Relevant bibliographies by topics / Fan simulator

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fan simulator'

Author: Grafiati
Published: 28 June 2021
Last updated: 5 February 2022

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Journal articles on the topic "Fan simulator"

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Sheikh-Mohamadi, Mohamad-Hossein, Nematollah Etemadi, and Mostafa Arab. "Correlation of Heat and Cold Tolerance in Iranian Tall Fescue Ecotypes with Reactive Oxygen Species Scavenging and Osmotic Adjustment." HortScience 53, no. 7 (July 2018): 1062–68. http://dx.doi.org/10.21273/hortsci13088-18.

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Excessive heat or cold usually reduces the growth and quality of turfgrass. Genetic variations along with efficient biochemical and physiological mechanisms can diversify the tolerance to heat and cold. This study examined the effects of heat and cold stress on several biochemical and physiological parameters in Iranian tall fescue ecotypes (Festuca arundinacea L.). The control group of plants was maintained under optimal temperatures, whereas other groups were exposed to heat or cold in a growth chamber. The experiment was designed as a split plot, with stress treatments as the main plots and ecotypes as subplots. Physiologically and biochemically, the results revealed that three ecotypes (‘FA1’, ‘FA3’, and ‘FA5’) of the eight ecotypes examined in this study had better abilities to survive the simulated heat and cold stress. Better tolerance to heat and cold in the ‘FA1’, ‘FA3’, and ‘FA5’ ecotypes were probably due to higher levels of enzymatic and nonenzymatic antioxidant activities, maintenance of lower levels of malondialdehyde (MDA) and hydrogen peroxide (H2O2), higher levels of proline and total nonstructural carbohydrates (TNC), along with a more efficient osmotic adjustment. Diamine oxidase (DAO) and polyamine oxidase (PAO) activities increased significantly in ‘FA1’, ‘FA3’, and ‘FA5’ ecotypes. In summary, the strength of tolerance among ecotypes can be ranked as ‘FA1’ > ‘FA3’ > ‘FA5’ > ‘FA2’ > ‘FA6’ > ‘FA4’ > ‘FA7’ > ‘FA8’ under heat stress and ‘FA5’> ‘FA1’ > ‘FA3’ > ‘FA2’ > ‘FA4’ > ‘FA6’ > ‘FA7’ > ‘FA8’ under cold stress.
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Kim, Myung-Il, and Seung-Hae Kim. "Development of a Fan Simulator Using Supercomputer." Journal of manufacturing engineering & technology 21, no. 5 (October 15, 2012): 805–13. http://dx.doi.org/10.7735/ksmte.2012.21.5.805.

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Nuckolls, W. E., and W. F. Ng. "Fan Noise Reduction From a Supersonic Inlet During Simulated Aircraft Approach." Journal of Engineering for Gas Turbines and Power 117, no. 2 (April 1, 1995): 237–44. http://dx.doi.org/10.1115/1.2814086.

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A series of experiments was conducted to investigate the radiation of fan noise from a supersonic inlet during a simulated aircraft approach. A scaled-down model of an axisymmetric, mixed-compression, supersonic inlet (P-inlet) was used in conjunction with a 10.4 cm (4.1 in) diameter turbofan engine simulator as the noise source. The tests were conducted at an outdoor facility under static conditions. The main goal of the experiment was to reduce the forward radiating fan noise by modifying the auxiliary inlet doors. The modified doors are designed to reduce the inlet distortion to the fan face. In addition, the new door design also uses a converging flow passage in order to take advantage of the noise attenuation due to the choking effect at the auxiliary door. The simulator was tested at 60 percent design speed in an attempt to match the simulator noise source to that of a real aircraft engine on approach. Both aerodynamic and acoustic measurements were taken in the experiments. The results show that when compared to the original design, the modified auxiliary inlet doors reduced the circumferential inlet distortion to the fan face by a factor of two. The key result is that the blade passing frequency tone has been decreased by an average of 6 dB in the forward sector for the modified door design. Results from the closed auxiliary inlet door case are also presented to provide additional comparisons.
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Balan, C. "Design Considerations of a Versatile Simulator for High-Bypass Turbofans." Journal of Engineering for Gas Turbines and Power 117, no. 1 (January 1, 1995): 31–37. http://dx.doi.org/10.1115/1.2812778.

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The continuing requirement for performance improvement of higher thrust turbofans is met by increased bypass ratios. The trend toward higher bypass ratios and relatively large-diameter low-pressure-ratio fans requires innovative design approaches, which include shorter inlets, slimmer nacelles, shorter fan ducts and exhaust systems, and possible elimination of thrust reverser. The success of this new generation of high-bypass ducted turbofans depends on understanding the acoustic impact from reduced treatment areas, inlet-fan coupling and operability, as well as overall system performance. To achieve these goals a versatile scale model propulsion simulator large enough to operate as a fan rig, yet small enough to be installed in a wind tunnel for evaluating overall acoustic, operability, and system performance, was developed. The criteria of designing such a simulator and its capabilities are discussed in this paper.
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Mitchell, Kenneth J. "SYLVER: Modelling the Impact of Silviculture on Yield, Lumber Value, and Economic Return." Forestry Chronicle 64, no. 2 (April 1, 1988): 127–31. http://dx.doi.org/10.5558/tfc64127b1-2.

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Intensive forest management requires an understanding of the effect that silvicultural treatments have on wood properties, standing yield, log quality, product value, and net present value. These needs are addressed by a system of models (SYLVER) which includes the Tree and Stand Simulator (TASS), Root Rot Simulator (ROTSIM), Sawmill Simulator (SAWSIM), and the new Financial Analysis System (FAN$Y). The latter will be used by field foresters to compare the merits of candidate treatments for specific stands. Key words: Silviculture, growth and yield, juvenile wood, log quality, end-product value, net present value, Pseudotsuga menziesii, Phellinus weirii, modelling, TASS, ROTSIM, SAWSIM, FAN$Y, SYLVER.
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Sullivan, T. J. "Aerodynamic Performance of a Scale-Model, Counterrotating Unducted Fan." Journal of Turbomachinery 112, no. 4 (October 1, 1990): 579–86. http://dx.doi.org/10.1115/1.2927696.

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The aerodynamic performance of a scale-model, counterrotating unducted fan has been determined and the results are discussed herein. Experimental investigations were conducted using the scale-model propulsor simulator and uniquely shaped fan blades designed by the General Electric Company under contract to NASA. The blades, designed for a high disk loading at Mach 0.72, 35,000 ft altitude max climb condition, are aft-mounted on the simulator in a “pusher” configuration. Data are compared with analytical predictions at the design point and show good agreement.
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Farfán, Ricardo Fabricio Muñoz, Telly Yarita Macías Zambrano, Vicente Paúl Zambrano Valencia, and Victor Manuel Delgado Sosa. "Design and construction of a cold production simulator system: chiller." International journal of physical sciences and engineering 3, no. 3 (November 25, 2019): 31–40. http://dx.doi.org/10.29332/ijpse.v3n3.367.

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The design and construction of a cold production system from the ice water submitted by a mechanical direct expansion system contributing to the development of knowledge in the area of air conditioning were carried out. Among the technical design parameters, a direct expansion system with cooling capacity of 9000 BTU/Hrs, R134 refrigerant gas to a turbine for the work of the Fan Coil of ½ Hp of force 220 V was selected, as was the fan motor of the cooling tower as fundamental means for heat transfer. The recirculation pumping system is carried out by pumps of 0.37 kW of power and a maximum flow of 40 l/min. For both the evaporator sump (cold) and the condenser sump (hot). The work stage is given in two independent circuits, the Fan Coil system is connected to the evaporator sump and the cooling tower, in turn, is connected to the condensation system for proper operation and achieve condensation temperatures of 35 ° C and in case of having water requirements in the cold sump, the tower is connected by means of an electromagnetic valve for its supply.
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Choi, Daehyun, Jaemoon Lee, and Sehong Min. "A Study on Analyzing the Operation Time of the Sprinkler Head near the Beam with Fire Simulation." Journal of the Korean Society of Hazard Mitigation 20, no. 1 (February 29, 2020): 265–72. http://dx.doi.org/10.9798/kosham.2020.20.1.265.

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In this study, the dangers surrounding vehicular fires were identified by means of statistical analysis of the national fire information system. The analysis was conducted on the operation time of the sprinkler fire extinguisher, which plays the most essential role during the initial fire extinguishing attempt, in case of a fire outbreak. A simulation was created using the application guidelines pertaining to a sprinkler head located close to a beam as provided in NFSC 103. The operation time of the sprinkler head was analyzed for the case of a parking lot fire where a fan was operated. Fire Dynamics Simulator was used as the simulation program. If the revised guidelines were applied to thesimulation, the sprinkler head located directly above the fire source was activated approximately 1 minin advance compared to the sprinkler head operating under current standards. Therefore, it was found that the revised guidelines were suitable and aided in early fire extinguishing attempts. In the case where a fan was operated along with the detector, during the outbreak of a fire, it was found that the operation of the sprinkler head located directly above the fire was delayed by two or more minutes compared to the simulated case where no fan was operated.
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Li, Min Xia, Xiu Hui Li, and Zhan Zhong Wang. "A Study of Airflow Organization in the Desert Environment Simulation Laboratory." Advanced Materials Research 171-172 (December 2010): 728–31. http://dx.doi.org/10.4028/www.scientific.net/amr.171-172.728.

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In this dissertation, the internal field of a laboratory of desert environment simulation was studied and analyzed. According to the sizes of the axial-fans and the laboratory, the numerical models of the fans and the laboratory were built with CAD and GAMBIT. The numerical simulation was carried out with commercial CFD software-Fluent and the k-ε model was established to research this project. The variation effect of the height of the solar simulator and the opening with exhaust hood on the flow field was also investigated. And the demand of different velocity outlet conditions could be met by changing fan rotational speed. From the results of the simulation and the experiment, it is shown that the method of numerical simulation coupling fan and laboratory model was feasible to the simulation of the laboratory.
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Wang, Ming Yung, and Hsiao Kang Ma. "Numerical Study of Solid Biomass Fuel in a Gasifier System." Advanced Materials Research 953-954 (June 2014): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.191.

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In this study, the gasification processes of different Taiwan’s agriculture wastes were studied by using software of Fire Dynamics Simulator (FDS), which developed by American National Institute of Standards and Technology (NIST), to build a model of downdraft fixed bed gasifier. Details of the operation condition for the Taiwan’s agriculture waste biomass fuel in the gasifier were obtained. They include traction fan speed, leakage air, internal temperature, moisture, and cold gas efficiency. The simulated results are found in small type fixed bed biomass gasifier under traction fan initial speed is 0.2m/s, the leakage air in the gasification area is less than 10% of the amount of wind quantity by traction fan and moisture content of solid biomass is limited at 10% ~ 20%(vol.) that temperature in gasification zone with steady supply fuel gas condition is near 850~900°C.
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Dissertations / Theses on the topic "Fan simulator"

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Kuřímský, Lukáš. "Zařízení pro automatizovaná testování řídicích jednotek plynových kotlů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442519.

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This diploma thesis deals with the design and implementation of a computer-controlled device for testing gas boiler control units, especially in the development phase. The reason for creating a test facility is the inadequacy of older test systems and the automation of existing testing. The test device in development consists of individual different cards. Each of the cards inserted into the motherboard performs its function in the system. Each of the cards has a special functionality which simulates the real conditions of the developed product. The basis of most cards is a microcontroller with a Cortex-M core, which communicates with the connected computer using the MODBUS protocol on the RS-485 communication interface. All cards on the bus are connected in parallel and behaves as a SLAVE, while the computer behaves as a MASTER and requests data or sends commands to the cards. The cards represent status switches (switching sensors), resistance and analog temperature sensors, PWM inputs and outputs (for simulation of feedback pumps or flow meters with pulse output). The cards also include a flame simulator, which reliably simulates the electrical properties of the flame and at the same time acts as a fan simulator. The input of the control unit is taken care of by the input card, which is intended for digital detection of the voltage presence in the range of 5 to 230 V DC and AC. Simultaneously, a card for connecting the power supply at zero voltage and disconnecting at zero current is created to supply the tested device with alternating voltage. A schematic diagram was designed or simulated for each card, then the function was verified and on this basis the whole card was created, including the microcontroller firmware. The most suitable solution and function of each card is carefully described and evaluated. All the requirements of the assignment within the work were met and the whole test equipment was manufactured and verified in four versions. In the future, the device is ready for the implementation of an automatic flame simulator and other improvements of individual module cards.
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Myre, David D. "Model fan passage flow simulation." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23962.

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Le, Roux Frederick Nicolaas. "The CFD simulation of an axial flow fan." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4344.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.
ENGLISH ABSTRACT: The purpose of this project is to investigate the method and accuracy of simulating axial ow fans with three-dimensional axisymmetric CFD models. Two models are evaluated and compared with experimental fan data. Veri cation data is obtained from a prototype fan tested in a facility conforming to the BS 848 standards. The ow eld over the blade surfaces is investigated further with a visualization experiment comprising of a stroboscope and wool tufts. Good correlation is found at medium to high ow rates and recommendations are made for simulation at lower ow rates as well as test guidelines at the fan test facility. The results and knowledge gained will be used to amend currently used actuator disc theory for axial ow fan simulation.
AFRIKAANSE OPSOMMING: Die doel van hierdie projek is om die metode en akkuraatheid om aksiaalvloeiwaaiers met drie-dimensionele BVM modelle te simuleer, te ondersoek. Twee modelle word geëvalueer en met eksperimentele waaiertoetse vergelyk. Veri- kasie data is verkry vanaf 'n prototipe waaier wat in 'n fasiliteit getoets is en wat aan die BS 848 standaarde voldoen. Die vloeiveld oor die lemoppervlaktes word ondersoek met 'n visualisering eksperiment wat uit 'n stroboskoop en wolletjies bestaan. Goeie korrelasie word gevind vir medium tot hoë massavloeie en aanbevelings word gemaak vir die simulasie by laer massavloeie met riglyne vir toetswerk in die toets-fasiliteit. Die resultate en kennis opgedoen sal gebruik word in die verbetering van huidige aksieskyfteorie vir numeriese aksiaalvloeiwaaier simulasies.
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Tapp, Eric A. "Development of a cascade simulation of fan-passage flow." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277234.

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Subramanya, Shreyasu. "Modelling and Simulation of Fan Performance using CFD Group." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-171106.

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Performance of vacuum cleaners are affected by factors such static pressure, airflow rate and efficiency. In this thesis work, attempt has been made to design a fan to meet the requirements of suction static pressure and air flow rate and in the process understand the fan design parameters that affect these performance parameters. Parametric study has been conducted for the same, by choosing six fan design parameters. Additionally, ways to increase the fan efficiency has been investigated during the parametric study. Computational Fluid Dynamics is used to visualize the flow inside the fan casing and further to simulate fan performance at an operational point. Steady state RANS and moving reference frames was used to model the turbulence in the fluid flow and rotation of the fan, respectively. Performance curve showing the relation between static suction pressure and mass flow rate is plotted for the base model is in proximity to the required performance. Parametric study was conducted on the six fan design parameters: Fan diameter, number of impeller blades, blade outlet angle, radius of the curve connecting inlet to outlet section of the fan, diffuser exit length and splitter blade length. The range for each parameter analysis was restricted so that static pressure values are around the required performance. Greater performance variation was found with design parameters: fan diameter, blade outlet angle, radius of the curve connecting inlet to outlet section of the fan and diffuser exit length. This variation at low mass flow rate can be majorly attributed to the randomness in the flow captured by entropy contours. At high mass flow rate, blockage in the flow visualized by pressure contours reasoned for the performance variation. Greater performance variation was not when design parameters such as number of blades and splitter blade length were varied. Larger variation of these parameters is required to see better variation.
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Abuelyaman, Eltayeb Salih. "Sequential circuits fault simulation using fan out stem based techniques." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184466.

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This dissertation describes a new simulation technique for an automatic test generation system, SCIRTSS version 4.0 (Sequential Circuit Test Sequence System). This test generation system is driven by the hardware compiler AHPL, a Hardware Programming Language, and an intelligent heuristic-based search for test vector generation. Using a fault-injection gate-level simulator and the generated test vector, all the faulty states of the circuit are simulated in parallel and the simulator is thus able to find all detected faults by a particular input sequence. The major objective of this research was to develop a faster replacement for the existing simulation process. The philosophy of divide and conquer is used in the development of the new simulation technique. Sequential networks are divided into combinational sub-networks, and, if necessary, the combinational sub-networks are further reduced into fan-out free regions. Thus, the problem is reduced to a relatively simple combinational one. In addition to the classical faults, the new simulator attempts to detect CMOS stuck-open faults. Several circuits were tested under SCIRTSS 4.0 using both the existing and the new simulation techniques. The results are listed in this paper to verify superiority of the new simulation technique.
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Seaton, M. Scot. "Performance measurements, flow visualization, and numerical simulation of a crossflow fan." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FSeaton.pdf.

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Thesis (M.S. in Aeronautical Engineering)--Naval Postgraduate School, March 2003.
Thesis advisor(s): Garth V. Hobson, Raymond P. Shreeve. Includes bibliographical references (p. 69-70). Also available online.
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Kummer, Joseph. "Simulation of the cross-flow fan and application to a propulsive airfoil concept." Related electronic resource: Current Research at SU : database of SU dissertations, recent titles available full text, 2006. http://proquest.umi.com/login?COPT=REJTPTU0NWQmSU5UPTAmVkVSPTI=&clientId=3739.

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Collins, Christopher C. "Preliminary investigation of the shock-boundary layer interaction in a simulated fan passage." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/28460.

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Golden, William L. "Static pressure measurements of the shock-boundary layer interaction in a simulated fan passage." Thesis, Monterey, California. Naval Postgraduate School, 1992. http://hdl.handle.net/10945/23778.

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Books on the topic "Fan simulator"

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Myre, David D. Model fan passage flow simulation. Monterey, Calif: Naval Postgraduate School, 1992.

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Fang zhen xi tong fen xi yu she ji. Beijing Shi: Guo fang gong ye chu ban she, 2010.

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Janus, J. Mark. Unsteady flowfield simulation of ducted prop-fan configurations. Washington, D. C: American Institute of Aeronautics and Astronautics, 1992.

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Kong jian huan jing jian mo yu ke shi hua fang zhen ji shu. Beijing: Guo fang gong ye chu ban she, 2012.

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Xi tong fang zhen. [Peking]: Guo fang gong ye chu ban she, 1985.

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Yuyang, You, and You Junsheng, eds. Chi xu zai he fei xing fang zhen ji shu yu gong cheng she ji: Sustained Acceleration Flight Simulation Technology and Engineering Design. Beijing: Guo fang gong ye chu ban she, 2013.

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Deckert, W. H. The lift-fan aircraft: Lessons learned. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1995.

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Fang zhen ke xue ji shu ji gong cheng. Beijing: Ke xue chu ban she, 2013.

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author, Yao Xinyu, ed. Lian xu xi tong fang zhen. Beijing: Guo fang ke ji da xue chu ban she, 2014.

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Chang di di zhen fan ying fen xi dao lun. Beijing Shi: Zhongguo tie dao chu ban she, 2010.

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Book chapters on the topic "Fan simulator"

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Kim, Myung-Il, Dong-Kyun Kim, Byung-Yeon Park, and Seung-Hae Kim. "Fan Simulator Using Supercomputer." In Lecture Notes in Electrical Engineering, 81–88. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-5076-0_9.

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Xu, Xian-wei, Jin-bao Xu, Yang Liu, Nan Hu, and JIan-xin Gao. "Saving Energy Control of Auxiliary Fan." In Advanced Research on Computer Education, Simulation and Modeling, 33–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21802-6_6.

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Kitagawa, K., H. Tatsuke, Y. Tsujimoto, and Y. Yoshida. "A Numerical Simulation of Cross Flow Fan." In Boundary Elements in Fluid Dynamics, 3–20. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2876-6_1.

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Sun, Tao, Yu Li, YueHan Xu, and ZhongYi Wang. "Numerical Simulation and Optimization of Centrifugal Fan." In Advances in Mechanical and Electronic Engineering, 311–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31507-7_51.

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Juanola-Parramon, Roser. "Far-infrared Interferometer Instrument Simulator (FIInS)." In A Far-Infrared Spectro-Spatial Space Interferometer, 73–99. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29400-1_4.

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Liu, Jialu, Yu Niu, and Yanhua Liu. "Optimal Design of Axial Flow Fan Using Numerical Simulation." In Environmental Science and Engineering, 1165–74. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-13-9528-4_118.

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Yi, Hua, Ji Jie, He Hanfeng, Jiang Aiguo, Han Chongwei, and Luo Chenglong. "Optimized Simulation for PV-TW System Using DC Fan." In Proceedings of ISES World Congress 2007 (Vol. I – Vol. V), 1617–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75997-3_332.

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Byrne, Aidan. "Medical Simulation: the Journey So Far." In Essential Simulation in Clinical Education, 11–25. Oxford, UK: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118748039.ch2.

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Juanola-Parramon, Roser. "Simulated Observations with FIInS." In A Far-Infrared Spectro-Spatial Space Interferometer, 127–41. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29400-1_6.

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Kim, Taedong, Byoung K. Choi, Keyhoon Ko, and Donghun Kang. "Gantt Chart Simulation for FAB Scheduling." In Communications in Computer and Information Science, 333–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45289-9_29.

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Conference papers on the topic "Fan simulator"

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Balan, Chellappa. "Design Considerations of a Versatile Simulator for High Bypass Turbofans." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-014.

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The continuing requirements for performance improvement of higher thrust turbofans is met by increased bypass ratios. The trend towards higher bypass ratios and relatively large diameter low pressure ratio fans require innovative design approaches which include shorter inlets, slimmer nacelles, shorter fan ducts and exhaust systems, and possible elimination of thrust reverser. The success of this new generation of high bypass ducted turbofans depends on understanding the acoustic impact from reduced treatment areas, inlet-fan coupling and operability, as well as overall system performance. To achieve these goals a versatile scale model propulsion simulator large enough to operate as a fan rig, yet small enough to be installed in a wind tunnel for evaluating overall acoustic, operability, and system performance was developed. The criteria of designing such a simulator and its capabilities are discussed in this paper.
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Chuang, H. Andrew, and Joseph M. Verdon. "A Nonlinear Numerical Simulator for Three-Dimensional Flows Through Vibrating Blade Rows." In ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/98-gt-018.

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The three-dimensional, multi-stage, unsteady, turbomachinery analysis, TURBO, has been extended to predict the aeroelastic and aeroacoustic response behaviors of a blade row operating within a cylindrical annular duct. In particular, a blade vibration capability has been incorporated so that the TURBO analysis can be applied over a solution domain that deforms with a vibratory blade motion. Also, unsteady far-field conditions have been implemented to render the computational inlet and exit boundaries transparent to outgoing unsteady disturbances and to allow for the prescription of incoming aerodynamic excitations. The modified TURBO analysis has been applied to predict unsteady subsonic and transonic flows. The intent is to partially validate this nonlinear analysis for blade flutter applications via numerical results for benchmark unsteady flows, and to demonstrate this analysis for a realistic fan rotor. For these purposes, we have considered unsteady subsonic flows through a 3D version of the 10th Standard Cascade and unsteady transonic flows through the first stage rotor of the NASA Lewis, Rotor 67 fan. Some general correlations between aeromechanical stabilities and fan operating characteristics will be presented.
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Zou, Jing, Zhanli Hu, Jianbao Gui, Junyan Rong, Yanming Li, and Hairong Zheng. "Geant4-Based Monte Carlo Simulator for Fan-and Cone-Beam X-ray CT." In 2010 4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE). IEEE, 2010. http://dx.doi.org/10.1109/icbbe.2010.5514746.

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Nuckolls, W. E., and W. F. Ng. "Fan Noise Reduction From a Supersonic Inlet During Simulated Aircraft Approach." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-279.

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A series of experiments was conducted to investigate the radiation of fan noise from a supersonic inlet during a simulated aircraft approach. A scaled-down model of an axisymmetric, mixed-compression, supersonic inlet (P-inlet) was used in conjunction with a 10.4 cm (4.1 in) diameter turbofan engine simulator as the noise source. The tests were conducted at an outdoor facility under static conditions. The main goal of the experiment was to reduce the forward radiating fan noise by modifying the auxiliary inlet doors. The modified doors are designed to reduce the inlet distortion to the fan face. In addition, the new door design also uses a converging flow passage in order to take advantage of the noise attenuation due to the choking effect at the auxiliary door. The simulator was tested at 60% design speed in an attempt to match the simulator noise source to that of a real aircraft engine on approach. Both aerodynamic and acoustic measurements were taken in the experiments. The results show that when compared to the original design, the modified auxiliary inlet doors reduced the circumferential inlet distortion to the fan face by a factor of two. The key result is that the blade passing frequency tone has been decreased by an average of 6 dB in the forward sector for the modified door design. Results from the closed auxiliary inlet door case are also presented to provide additional comparisons.
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Hughes, Christopher E., Gary G. Podboy, Richard P. Woodward, and Robert J. Jeracki. "The Effect of Bypass Nozzle Exit Area on Fan Aerodynamic Performance and Noise in a Model Turbofan Simulator." In ASME Turbo Expo 2005: Power for Land, Sea, and Air. ASMEDC, 2005. http://dx.doi.org/10.1115/gt2005-68573.

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The design of effective new technologies to reduce aircraft propulsion noise is dependent on identifying and understanding the noise sources and noise generation mechanisms in the modern turbofan engine, as well as determining their contribution to the overall aircraft noise signature. Therefore, a comprehensive aeroacoustic wind tunnel test program was conducted as part of the NASA Quiet Aircraft Technology program called the Fan Broadband Source Diagnostic Test. The test was performed in the anechoic NASA Glenn 9- by 15-Foot Low Speed Wind Tunnel using a 1/5 scale model turbofan simulator that representative of a current generation, medium pressure ratio high bypass turbofan engine. The investigation was focused on the simulated bypass section of the turbofan engine. The technical objectives of the test were not only to identify the noise sources within the model and determine their noise level, but also to investigate several component design technologies by evaluating their impact on the aerodynamic and acoustic performance as well as conducting detailed flow diagnostics within the research model to help in understanding the physics of the flowfield. This report will present details of the results obtained for one aspect of the test that investigated the effect of the bypass nozzle exit area on the bypass stage performance, specifically the fan and outlet guide vanes, or stators. The aerodynamic performance, farfield acoustics, and Laser Doppler Velocimeter measurements obtained for the fan and four different fixed-area bypass nozzles. The nozzles represented fixed engine operating lines encompassing the operating envelope of the turbofan engine from near stall to cruise, with a total change in area from the smallest to the largest nozzle of 12.9%. One nozzle exit area was selected as a baseline reference, and its area was 2% larger than the smallest nozzle and 10.9% smaller than the largest nozzle. The results will show that there are significant changes in aerodynamic performance and farfield acoustics as the nozzle area is increased. As the fan exit nozzle area was increased, the weight flow through the fan model increased between 7% and 9%, the fan and stage pressure dropped between 8% and 10%, and the adiabatic efficiencies increased between 2% and 3% — the magnitude of the change dependent on the fan speed. Results from force balance measurements made of fan and outlet guide vane thrust will show that as the nozzle exit area is increased the combined thrust of the fan and outlet guide vanes together also increases, between 2% and 3.5%. In terms of farfield acoustics, the overall sound power level produced by the fan model dropped between 1 and 3.5 dB as the nozzle exit area was increased, with the larger decrease in noise occurring near approach conditions and the smaller decrease near takeoff condition. Both fan tone and broadband levels are discussed. The amount of area the fan exit nozzle can be opened was limited, as the largest of the four nozzle designs encountered performance problems at full power takeoff conditions, at which point its performance was actually worse both in terms of lower aerodynamic performance and higher noise levels compared to the baseline nozzle. Finally, flow diagnostic results in the form of fan swirl angle survey data and Laser Doppler Velocimeter mean velocity and turbulence measurements obtained downstream of the fan within the wake will show that the noise of the fan module decreases as a result of lower swirl angles and lower turbulence levels within the wake as the fan exit nozzle area increases.
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Khaletskiy, Yuri, and Victor Mileshin. "Experimental Study of 700-mm Fan Model Noise at CIAM Anechoic Chamber." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-94454.

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The results of 700-mm fan model study in terms of acoustic response obtained at the CIAM C-3A test rig anechoic chamber are represented. The fan model is a bypass universal propulsion simulator UPS (bypass ratio 8.5, pressure ratio 1.54, fan tip speed 395 m/s, scaled factor k = 2.7) with one-stage fan and nacelle inside which hush kit may be installed. At the CIAM test rig C-3A acoustic investigation of the S-2 wide chord fan model was carried out. The results showed that at Runway and Flyover the S-2 fan model noise spectra practically did not differ from the noise spectra of single stage fan models with conventional blades. At Approach mode the S-2 fan model noise spectra radiated in front hemisphere contains several high level tonal components which could be identified as tonal noise at sum frequencies of rotor interaction with the first booster stage. It should be mentioned, that at Approach mode tonal noise at BPF practically does not exceed the broadband noise. The UPS noise matrices obtained allowed noise prediction of the hypothetical aircraft equipped with turbofan, the scaled fan model of which was tested.
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BOLDMAN, D., C. IEK, D. HWANG, R. JERACKI, and M. LARKIN. "Evaluation of panel code predictions with experimental results of inlet performance for a 17-inch ducted prop/fan simulator operating at Mach 0.2." In 27th Joint Propulsion Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-3354.

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Panindre, Prabodh, Sunil Kumar, Atulya Narendranath, Vinay Kanive Manjunath, Venkata Pushkar Chintaluri, and Vishal Prajapati. "Optimization of Positive Pressure Ventiliation Tactic for Wind Driven High Rise Fires." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62908.

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Positive Pressure Ventilation (PPV) is a firefighting tactic that can mitigate the spread of fire and the combustion products to improve the safety of firefighters and civilians in wind-driven high-rise fires than without PPV. The performance of a PPV tactic in wind-driven high-rise fires depends on various parameters that include wind speed, control of stairwell doors, number of fans, fan positions and placements, fire location etc. This paper describes the influence of these parameters on the efficacy of PPV operation that was studied by simulating wind-driven high-rise fire scenarios using computational fluid dynamics softwares Fluent 12.0 and NIST’s Fire dynamic simulator (FDS 5.0). The results obtained from Fluent and FDS found to be in close agreement with each other and have been used to optimize the PPV operation for better performance.
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Guoqi, Li, Lin Peifeng, Cui Baoling, Jin Yingzi, Hu Yongjun, and Lin Zhe. "Numerical Simulation on Flow Field of Bladeless Fan." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21770.

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With the advent of bladeless fan, technological revolutions begin to hit the industrial design world of fan. However, there is none of the developed methods on bladeless fan. To explore the excellent blowing performance of bladeless fan, numerical simulation on flow field of bladeless fan was carried out in this paper. Based on the simplified model of bladeless fan, the whole process that the airflow passes through the turbine from the inlet to the outlet slit and exit far field at last, were simulated. By comparing the flux of inlet and the flux of far outlet, the causes of flux increasing are analyzed. After analyzing static characteristics of the flow field, it shows that pressure difference is very obvious. The results obtained from velocity distribution and the characteristics of the pathlines near diffuser section and turbine, were described and analyzed. The results show that the internal flow field characteristics of bladeless fans, which we concern. The external flow field characteristics of bladeless fan was studied in the same way. And it is found that the velocity magnitude of the outlet slit and Coanda surface is much larger than other area and different positions play different roles. A general analysis on inside computational domain and outside computational domain, denotes the details about fluid motion. The research could offer reference to improvement of bladeless fan.
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Mawid, M. A., C. A. Arana, and B. Sekar. "Application of a Thermal-Hydraulic Management Model to Gas Turbine Combustors and Fuel Systems." In ASME 1999 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/99-gt-054.

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An advanced thermal management analysis tool, named Advanced Thermal Hydraulic Energy Network Analyzer (ATHENA), has been used to simulate a fuel system for gas turbine engines. The ATHENA tool was modified to account for JP-8/dodecane fuel properties. The JP-8/dodecane fuel thermodynamic properties were obtained from the SUPERTRAP property program. A series of tests of a fuel system simulator located at the Air Force Research Laboratory (AFRL)/Wright Patterson Air Force Base were conducted to characterize the steady state and dynamic behavior of the fuel system. Temperature, pressures and fuel flows for various fuel pump speeds, pressure rise and flow control valve stem positions (orifice areas), heat loads and engine fuel flows were measured. The predicted results were compared to the measured data and found to be in excellent agreement. This demonstrates the capability of the ATHENA tool to reproduce the experimental data and, consequently, its validity as an analysis tool that can be used to carry out analysis and design of fuel systems for advanced gas turbine engines. However, some key components in the fuel system simulator such as control components, which regulate the engine fuel flow based on predetermined parameters such as fan speed, compressor inlet and exit pressures and temperatures, combustor pressure, turbine temperature and power demand, were not simulated in the present investigation due to their complex interactions with other components functions. Efforts are currently underway to simulate the operation of the fuel system components with control as the engine fuel flow and power demands are varied.
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Reports on the topic "Fan simulator"

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Brito, Pedro, Júlio Costa, João Brito, and Pedro Figueiredo. Simulated Soccer Games Protocols: What we Know so far—A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, February 2021. http://dx.doi.org/10.37766/inplasy2021.2.0080.

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Castiglioni, Whitmaur, Alex Himmel, and Bryan Ramson. Simulation Studies Of Photon Signal Reconstruction In The DUNE Single Phase Far Detector With Xe Doping. Office of Scientific and Technical Information (OSTI), August 2019. http://dx.doi.org/10.2172/1614720.

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Clausen, Jay, Michael Musty, Anna Wagner, Susan Frankenstein, and Jason Dorvee. Modeling of a multi-month thermal IR study. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41060.

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Inconsistent and unacceptable probability of detection (PD) and false alarm rates (FAR) due to varying environmental conditions hamper buried object detection. A 4-month study evaluated the environmental parameters impacting standoff thermal infra-red(IR) detection of buried objects. Field observations were integrated into a model depicting the temporal and spatial thermal changes through a 1-week period utilizing a 15-minute time-step interval. The model illustrates the surface thermal observations obtained with a thermal IR camera contemporaneously with a 3-d presentation of subsurface soil temperatures obtained with 156 buried thermocouples. Precipitation events and subsequent soil moisture responses synchronized to the temperature data are also included in the model simulation. The simulation shows the temperature response of buried objects due to changes in incoming solar radiation, air/surface soil temperature changes, latent heat exchange between the objects and surrounding soil, and impacts due to precipitation/changes in soil moisture. Differences are noted between the thermal response of plastic and metal objects as well as depth of burial below the ground surface. Nearly identical environmental conditions on different days did not always elicit the same spatial thermal response.
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Malej, Matt, and Fengyan Shi. Suppressing the pressure-source instability in modeling deep-draft vessels with low under-keel clearance in FUNWAVE-TVD. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40639.

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This Coastal and Hydraulics Engineering Technical Note (CHETN) documents the development through verification and validation of three instability-suppressing mechanisms in FUNWAVE-TVD, a Boussinesq-type numerical wave model, when modeling deep-draft vessels with a low under-keel clearance (UKC). Many large commercial ports and channels (e.g., Houston Ship Channel, Galveston, US Army Corps of Engineers [USACE]) are traveled and affected by tens of thousands of commercial vessel passages per year. In a series of recent projects undertaken for the Galveston District (USACE), it was discovered that when deep-draft vessels are modeled using pressure-source mechanisms, they can suffer from model instabilities when low UKC is employed (e.g., vessel draft of 12 m¹ in a channel of 15 m or less of depth), rendering a simulation unstable and obsolete. As an increasingly large number of deep-draft vessels are put into service, this problem is becoming more severe. This presents an operational challenge when modeling large container-type vessels in busy shipping channels, as these often will come as close as 1 m to the bottom of the channel, or even touch the bottom. This behavior would subsequently exhibit a numerical discontinuity in a given model and could severely limit the sample size of modeled vessels. This CHETN outlines a robust approach to suppressing such instability without compromising the integrity of the far-field vessel wave/wake solution. The three methods developed in this study aim to suppress high-frequency spikes generated nearfield of a vessel. They are a shock-capturing method, a friction method, and a viscosity method, respectively. The tests show that the combined shock-capturing and friction method is the most effective method to suppress the local high-frequency noises, while not affecting the far-field solution. A strong test, in which the target draft is larger than the channel depth, shows that there are no high-frequency noises generated in the case of ship squat as long as the shock-capturing method is used.
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