Relevant bibliographies by topics / Combined CFD-Experiment

Academic literature on the topic 'Combined CFD-Experiment'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Combined CFD-Experiment"

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Xie, Changxiong, Heng Su, Jun Yang, and Zhongjing He. "Design and Analysis of Combined Valve Spool with Linear Flow Coefficient." Journal of Engineering 2022 (June 13, 2022): 1–7. http://dx.doi.org/10.1155/2022/6006810.

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The orifice flow model is generally established based on the turbulent state, and the flow discharge is considered to be a constant value. In fact, the flow discharge has obvious nonlinearity under the condition of small opening and small pressure difference of the valve port, which makes the electro-hydraulic servo system more difficult to control. In order to improve the nonlinearity of the flow discharge, the paper designed different spool profile, such as the arc combined spool profile, the power curve combined spool profile, the index curve combined spool profile, and the mixed curve combined spool profile, and analyzed the flow discharge through CFD simulation and experiment. The results show that the flow discharge of the mixed curve combined spool is more linear and the residual sum of squares is the smallest, which is 2.56 × 10−3 under CFD numerical simulation and 3.26 × 10−4 under experiment. The combined spool has better linear characteristics, which can improve the control performance of the electro-hydraulic servo valve.
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Li, Hui Yuan, Ming Xu, and Chao Wu. "Flow Field Analysis and Experiment Study on Air Losing of Hydraulic Retarder." Advanced Materials Research 378-379 (October 2011): 94–97. http://dx.doi.org/10.4028/www.scientific.net/amr.378-379.94.

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Based on application characteristic of hydraulic retarder in combined braking, the generant mechanism of air losing is analyzed, by adding baffle-plate setting, air losing is reduced. Using CFD technology, the ameliorative hydraulic retarder is studied contrastively, and the results are in good agreement with the experiment.
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Feng, Jing-an, Xiao-qi Tang, Wei-bing Wang, Rui Ying, and Ting Zhang. "A Combined Method in Parameters Optimization of Hydrocyclone." Mathematical Problems in Engineering 2016 (2016): 1–13. http://dx.doi.org/10.1155/2016/9209362.

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To achieve efficient separation of calcium hydroxide and impurities in carbide slag by using hydrocyclone, the physical granularity property of carbide slag, hydrocyclone operation parameters for slurry concentration, and the slurry velocity inlet are designed to be optimized. The optimization methods are combined with the Design of Experiment (DOE) method and the Computational Fluid Dynamics (CFD) method. Based on Design Expert software, the central composite design (CCD) with three factors and five levels amounting to five groups of 20 test responses was constructed, and the experiments were performed by numerical simulation software FLUENT. Through the analysis of variance deduced from numerical simulation experiment results, the regression equations of pressure drop, overflow concentration, purity, and separation efficiencies of two solid phases were, respectively, obtained. The influences of factors were analyzed by the responses, respectively. Finally, optimized results were obtained by the multiobjective optimization method through the Design Expert software. Based on the optimized conditions, the validation test by numerical simulation and separation experiment were separately proceeded. The results proved that the combined method could be efficiently used in studying the hydrocyclone and it has a good performance in application engineering.
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Park, Donggeun, and Jong-Hyeon Lee. "Feasibility Evaluation of Computational Fluid Dynamics Approach for Inhalation Exposure Assessment: Case Study for Biocide Spray." Applied Sciences 11, no. 2 (January 11, 2021): 634. http://dx.doi.org/10.3390/app11020634.

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Consumer products contain chemical substances that threaten human health. The zero-dimensional modeling methods and experimental methods have been used to estimate the inhalation exposure concentration of consumer products. The model and measurement methods have a spatial property problem and time/cost-consuming problem, respectively. For solving the problems due to the conventional methodology, this study investigated the feasibility of applying computational fluid dynamics (CFD) for the evaluation of inhalation exposure by comparing the experiment results and the zero-dimensional results with CFD results. To calculate the aerosol concentration, the CFD was performed by combined the 3D Reynolds averaged Navier–Stokes equations and a discrete phased model using ANSYS FLUENT. As a result of comparing the three methodologies performed under the same simulation/experimental conditions, we found that the zero-dimensional spray model shows an approximately five times underestimated inhalation exposure concentration when compared with the CFD results and measurement results in near field. Additionally, the results of the measured concentration of aerosols at five locations and the CFD results at the same location were compared to show the possibility of evaluating inhalation exposure at various locations using CFD instead of the experimental method. The CFD results according to measurement positions can rationally predict the measurement results with low error. In conclusion, in the field of exposure science, a guideline for exposure evaluation using CFD, was found that complements the shortcomings of the conventional methodology, the zero-dimensional spray model and measurement method.
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Park, Donggeun, and Jong-Hyeon Lee. "Feasibility Evaluation of Computational Fluid Dynamics Approach for Inhalation Exposure Assessment: Case Study for Biocide Spray." Applied Sciences 11, no. 2 (January 11, 2021): 634. http://dx.doi.org/10.3390/app11020634.

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Consumer products contain chemical substances that threaten human health. The zero-dimensional modeling methods and experimental methods have been used to estimate the inhalation exposure concentration of consumer products. The model and measurement methods have a spatial property problem and time/cost-consuming problem, respectively. For solving the problems due to the conventional methodology, this study investigated the feasibility of applying computational fluid dynamics (CFD) for the evaluation of inhalation exposure by comparing the experiment results and the zero-dimensional results with CFD results. To calculate the aerosol concentration, the CFD was performed by combined the 3D Reynolds averaged Navier–Stokes equations and a discrete phased model using ANSYS FLUENT. As a result of comparing the three methodologies performed under the same simulation/experimental conditions, we found that the zero-dimensional spray model shows an approximately five times underestimated inhalation exposure concentration when compared with the CFD results and measurement results in near field. Additionally, the results of the measured concentration of aerosols at five locations and the CFD results at the same location were compared to show the possibility of evaluating inhalation exposure at various locations using CFD instead of the experimental method. The CFD results according to measurement positions can rationally predict the measurement results with low error. In conclusion, in the field of exposure science, a guideline for exposure evaluation using CFD, was found that complements the shortcomings of the conventional methodology, the zero-dimensional spray model and measurement method.
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Meng, Jin Long, and Zhao Qin Yin. "Numerical Simulation on the Parallel Combined Nozzles of Mini/Micro Gas Flow Standard Device." Advanced Materials Research 472-475 (February 2012): 2000–2003. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2000.

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The flow characteristics in mini/micro sonic nozzles have been studied in this paper using the computational fluid dynamics (CFD) method. The result shows that the flow rate of the parallel combined nozzles is not equal to but smaller than that of the sum of the nozzles. The reason is the each effect of the air after nozzles, which changes the flow field parameters .The more number of the parallel combined nozzles, the bigger error exits between actual flow rate and that of the sum of the nozzles. The result is consistent to the experiment. The study also shows the smaller of the nozzle’s diameter, the bigger error exits.
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Long, Christopher A., Alan B. Turner, Guven Kais, Kok M. Tham, and John A. Verdicchio. "Measurement and CFD Prediction of the Flow Within an HP Compressor Drive Cone." Journal of Turbomachinery 125, no. 1 (January 1, 2003): 165–72. http://dx.doi.org/10.1115/1.1516195.

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In some gas turbine aeroengines, the HP compressor is driven by the H.P. turbine through a conical shaft or drive cone. This drive cone is enclosed by a stationary surface that forms the supporting material for the combustion chambers. Air used to cool the turbine blades is directed into the space around the drive cone, and a major concern to an engine designer is the temperature rise in this air due to frictional dissipation and heat transfer. This paper presents results from a combined experimental and CFD investigation into the flow within an engine representative HP compressor drive cone cavity. The experimental results show similarities in flow structure to that found in classic rotor-stator systems. Both 2-D and 3-D CFD simulations were carried out using the FLUENT/UNS code. The 3-D model which included the actual compressor blade tip clearance gave the best agreement with the experimental data. However, the computational resource required to run the 3-D model limits its practical use. The 2-D CFD model, however, was found to give good agreement with experiment, providing care was exercised in selecting an appropriate value of initial tangential velocity.
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Tang, Yi, Jing Xie, Chen Miao, Jin Feng Wang, and Yi Zheng. "Theoretical Study and CFD Simulation of Airflow Distribution through a Cold Store." Applied Mechanics and Materials 170-173 (May 2012): 3543–49. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3543.

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Recently, the quantity of the cold store has been increased quickly. It is a key point to improve the uniformity of airflow field to the cold store. In this paper, a model of simulating cold store by computational fluid dynamics (CFD) was introduced. Simple algorithm combined with Boussineq assumption was used and turbulent equation combined with standard wall function was applied to define the flow of air in the cold store. Both the structured mesh and unstructured mesh to cold store model were simulated. The simulation methods of airflow in a cold store between three-dimension (3D) technology and two-dimension (2D) technology were also discussed. The experiment was validated and proved that unstructured grid was in better agreement with the result of experiments and it was gotten that the three-dimension (3D) technology had a higher accuracy in simulation of airflow distribution. The airflow distribution in the vertical plane and horizontal plane in cold store were gotten, respectively.
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Guntur, Srinivas, Niels N. Sørensen, and Scott Schreck. "Dynamic Stall on Rotating Airfoils: A Look at the N-Sequence Data from the NREL Phase VI Experiment." Key Engineering Materials 569-570 (July 2013): 611–19. http://dx.doi.org/10.4028/www.scientific.net/kem.569-570.611.

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This paper presents an investigation on the combined effect of dynamic stall and rotational augmentation on wind turbine blades. Dynamic stall and rotational augmentation have previously been studied independently. The NREL Phase VI experiment was one large scale experiment that recorded 3D measurements on rotating and pitching airfoils, and using some these data the behaviour of the unsteady CL-α polars under the influence of rotation is investigated. Unsteady DES CFD computations of the Phase VI rotor in axial operation and continuous pitching conditions (reproducing conditions similar to the N-sequence experiments) for select cases have also been carried out using the in-house flow solver EllipSys3D. The resulting set of CL-α curves for the airfoils in rotation operating at various values of the frequency, the mean, and the amplitude of the angle of attack resulting from the CFD computations as well as those from the experiments are presented and discussed. Qualitative differences between dynamic stall occurrence on rotating and stationary airfoils are highlighted, procedures employed to extract the mean angle of attack from the available experimental data are discussed, and comments are made on the application of dynamic stall models in conjunction with 3D augmentation models on the rotating wind turbine blades.
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Park, Jung Ha, Seol Hui Park, Jung Hoon Ju, and Jin Chul Park. "An Experiment and CFD Simulation for the Application of a Wind Power System Combined with Exhaust in Super High-Rise Apartment Buildings." Journal of Asian Architecture and Building Engineering 13, no. 2 (May 2014): 459–65. http://dx.doi.org/10.3130/jaabe.13.459.

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Books on the topic "Combined CFD-Experiment"

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Eimanis, Mārcis. Usage of Double-Helical Propulsion Principle in Underwater Vehicles. RTU Press, 2022. http://dx.doi.org/10.7250/9789934227370.

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The Thesis describes a new underwater vehicle propulsion type developed by the author. Flow and vehicle interaction dynamics are studied, and factors impacting the flow, control methods and the ability to move in other media (in addition to fluid) are reviewed. A geometry of the propulsion system was created by studying its hydrodynamic properties using special CFD software. A mathematical model for the control system was created. The dynamics of the underwater vehicle were modelled with the multibody dynamics modelling software MSC Adams, using the developed control system and the water resistance model developed with CFD software. Flow dynamics were combined with multibody mechanism dynamics using the metamodeling and numerical experiment approach. Numerical experiments in bulk or granular media were performed using the discrete element method, simulating the vehicle movement using the EDEM software. Within the framework of the Thesis, a prototype of the model was also created for observing the model behaviour in real-life conditions. High-quality and good fit results were obtained from the mathematical model and the physical prototype dynamics, proving the performance of both the new propulsion principle and the control system.
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Conference papers on the topic "Combined CFD-Experiment"

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Babic´, Miroslav, Ivo Kljenak, Matjazˇ Leskovar, and Borut Mavko. "Simulation of TOSQAN 101 Containment Spray Test With Combined Eulerian CFD and Droplet-Tracking Modelling." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48225.

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The purposes of containment spray system operation during a severe accident in a light water reactor (LWR) nuclear power plant (NPP) are to depressurize the containment by steam condensation on spray droplets, to reduce the risk of hydrogen burning by mixing the containment atmosphere, and to collect radioactive aerosols from the containment atmosphere. While the depressurization may be predicted fairly well using lumped-parameter codes, the prediction of mixing and collection of aerosols requires a local description of transport phenomena. In the present work, modelling of sprays on local instantenous scale is presented and the Design of Experiment (DOE) method is used to assess the influence of boundary conditions on the simulation results. The TOSQAN 101 spray test, which was used for a benchmarking exercise within the EU Severe accident research network of excellence (SARNET), was simulated, and simulation results were compared to experimental data. The modelling approach is based on a Lagrangian description of the dispersed liquid phase (droplets), an Eulerian approach for the description of the continuous gas phase, and a two-way interaction between the phases. The simulations are performed using a combination of the computational fluid dynamics (CFD) code CFX4.4, which solves the gas transport equations, and of a newly proposed dedicated Lagrangian droplet-tracking code. The intent of the presented work is to assess the modeling of sprays and liquid on the wall in the presented approach with the emphasis on the heat and mass transfer between liquid and gas phase. The simulation-experiment comparison of available global and local variables demonstrates that the proposed approach is suitable for prediction of global variables evolution and of the non-homogenous structure of the atmosphere. The boundary condition steady-state sensitivity study is performed and shows that the global variables are mostly affected by the wall temperature boundary condition.
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Liu, Yang, Yihao Zheng, John Pitre, William Weitzel, Joseph Bull, and Albert Shih. "Manufacturing and Computational Fluid Dynamics Modeling of a Patient-Specific Fistula Model." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-3002.

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Arteriovenous fistula is the joining of an artery to a vein to create vascular access for dialysis. The failure or maturation of fistula is affected by the vessel wall shear stress (WSS), which is difficult to measure in clinic. A computational fluid dynamics (CFD) model was built to estimate WSS of a patient-specific fistula model. To validate this model, a silicone phantom was manufactured and used to carry out a particle imaging velocimetry (PIV) experiment. The flow field from the PIV experiment shows a good agreement with the CFD model. From the CFD model, the highest WSS (40 Pa) happens near the anastomosis. WSS in the vein is larger than that in the artery. WSS on the outer venous wall is larger than that on the inner wall. The combined technique of additive manufacturing, silicone molding, and CFD is an effective tool to understand the maturation mechanism of a fistula.
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Pointer, W. David, Mark W. Wendel, Jason M. Crye, Arthur E. Ruggles, David K. Felde, Philip A. Jalouk, Graydon L. Yoder, and John R. Haines. "Scaled Experiments and CFD Simulations Supporting the Design of the Spallation Neutron Source Mercury Target." In ASME 2000 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2000. http://dx.doi.org/10.1115/imece2000-2081.

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Abstract A combination of experimental and computational methods is necessary to adequately characterize the flow patterns in the liquid mercury target of the Spallation Neutron Source (SNS). Since liquid mercury is completely opaque and corrosive to many materials, the use of liquid mercury as the working fluid makes complete characterization of the flow field by experiment difficult. Furthermore, flow asymmetries and quasi-periodic instabilities that are observed in early target flow experiments are difficult to capture in computational fluid dynamics (CFD) simulations of the system. Therefore, an experimental program using several scaled experiments is combined with CFD simulation for the design and development of the SNS mercury target.
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Gao, Hong, Wanlai Lin, and Fangming Ye. "An Investigation of the Flow and Global Performance in a Water-Jet Axial Flow Pump Based on CFD and Inverse Design Method." In ASME 2005 Fluids Engineering Division Summer Meeting. ASMEDC, 2005. http://dx.doi.org/10.1115/fedsm2005-77116.

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A new inverse design method based on non-constant distribution of circulation and axial velocity along the radial direction is used to design a pump impeller and a stator. The radial distribution of axial velocity at the design flow rate is calculated when an empirical radial distribution of circulation is given. CFD modeling of the global performance and the detailed flow field is performed using TASCflow software. A standard k-ε turbulence model combined with standard wall functions is used. A special mixing plane approach is employed to simulate the rotator-stator coupling flow field. The global performances of the water-jet pump, the radial distribution of velocity components at the exit of the impeller are also measured. Good agreement of the global performance, such as the pressure rise, the power and the efficiency, between CFD and experiment is obtained. The detailed velocity fields from inviscid analysis, CFD and experiment are compared and investigated.
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Chen, Liu, Cao Yipeng, Sun Wenjian, Zhang Wenping, Ming Pingjian, and Lin Guang. "Study on the Simulation Method of Compressor Aerodynamic Noise Based on CFD and IBEM." In ASME 2016 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/icef2016-9420.

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Turbocharger compressor aerodynamic noise has been one of the major noise sources of diesel engine. It is necessary to study the characteristics of turbocharger fluid flow and radiation noise for its effective noise control. In this paper, a new for predicting compressor aerodynamic noise is presented, which combined the computational fluid dynamic (CFD) and indirect boundary element method (IBEM). The unsteady viscous flow in compressor was simulated based on the finite volume method. In addition, the periodic pressure fluctuation of the rotor inlet and blades were used to compressor radiation noise field simulation by indirect boundary element method. In order to prove the feasibility of numerical simulation, the acoustics experimental device for compressor aerodynamic noise experiment was built and the sound pressure of turbocharger were tested. The trend of simulation results and amplitude level in blade passing frequency (BPF) coincide with the experiment results. It indicates that the coupling method is more effective and accurate in turbocharger noise prediction.
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Long, Christopher A., Alan B. Turner, Guven Kais, Kok M. Tham, and John A. Verdicchio. "Measurement and CFD Prediction of the Flow Within an H.P. Compressor Drive Cone." In ASME Turbo Expo 2002: Power for Land, Sea, and Air. ASMEDC, 2002. http://dx.doi.org/10.1115/gt2002-30239.

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In some gas turbine aeroengines, the H.P. compressor is driven by the H.P. turbine through a conical shaft or drive cone. This drive cone is enclosed by a stationary surface that forms the supporting material for the combustion chambers. Air used to cool the turbine blades is directed into the space around the drive cone, and a major concern to an engine designer is the temperature rise in this air due to frictional dissipation and heat transfer. This paper presents results from a combined experimental and CFD investigation into the flow within an engine representative H.P. compressor drive cone cavity. The experimental results show similarities in flow structure to that found in classic rotor-stator systems. Both 2D and 3D CFD simulations were carried out using the FLUENT/UNS code. The 3D model which included the actual compressor blade tip clearance gave the best agreement with the experimental data. However, the computational resource required to run the 3D model limits its practical use. The 2D CFD model, however, was found to give good agreement with experiment, providing care was exercised in selecting an appropriate value of initial tangential velocity.
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Korivi, Vamshi M., Su K. Cho, and Amer A. Amer. "Port DOE With Parametric Modeling and CFD." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98522.

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Port design is an integral part of a combustion system. For a spark-ignited engine, it impacts both in-cylinder charge motion and performance potential. While turbulence intensity and air-mixture quality affect dilution tolerance and fuel economy as a result, breathing ability affects wide open throttle performance. Traditional approaches deploy experimental techniques to reach a target balance between the charge motion and breathing capacity. Such techniques do not necessarily result in an optimized solution. Unrelenting development of Computational Fluid Dynamics (CFD) tools, Design of Experiment (DOE) and optimization techniques combined with increased computational power led to the development of new methodologies over the past decade. Such advancements have the potential to deliver optimized solutions. Recent releases of engineering CAD packages, like CATIA V5 and Pro-Engineer, enable both parametric modeling and associative design update. This paper demonstrates a coupling process between CFD analysis and engineering CAD software using process integration and design optimization software (PIDO). CATIA V5, ICEM-CFD meshing tool and FLUENT-UNS CFD code were integrated to run through many port designs using ISIGHT. The automatic coupling was aimed at optimizing the port layout for a certain cost function such as flow restriction or charge motion, subject to manufacturing and packaging constraints. Accomplishing this task necessitates running the executables of various software using macros and scripts. This integrating methodology utilized best design practices for an intake port, and numerous numerical experiments were attempted. This methodology was demonstrated on a V-engine intake port with geometric, manufacturing and packaging constraints. In order to prove the methodology described, two distinct designs were attempted, the first of which demonstrated high flow at the expense of charge motion, while the other targeted tumble charge motion to the detriment of flow. Both concepts were prototyped and evaluated on the flow bench. Good correlation between simulation and test results was demonstrated in this study. It was concluded that this process could be reliably adopted in a production environment with reasonable amount of turn around time.
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Salary, Roozbeh (Ross), Jack P. Lombardi, Darshana L. Weerawarne, Prahalada K. Rao, and Mark D. Poliks. "A Computational Fluid Dynamics (CFD) Study of Material Transport and Deposition in Aerosol Jet Printing (AJP) Process." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87647.

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The objective of this work is to forward a 3D computational fluid dynamics (CFD) model to explain the aerodynamics behind aerosol transport and deposition in aerosol jet printing (AJP). The CFD model allows for: (i) mapping of velocity fields as well as particle trajectories; and (ii) investigation of post-deposition phenomena of sticking, rebounding, spreading, and splashing. The complex geometry of the deposition head was modeled in the ANSYS-Fluent environment, based on a patented design as well as accurate measurements, obtained from 3D X-ray CT imaging. The entire volume of the geometry was subsequently meshed, using a mixture of smooth and soft quadrilateral elements, with consideration of layers of inflation to obtain an accurate solution near the walls. A combined approach — based on the density-based and pressure-based Navier-Stokes formation — was adopted to obtain steady-state solutions and to bring the conservation imbalances below a specified linearization tolerance (10−6). Turbulence was modeled, using the realizable k-ε viscose model with scalable wall functions. A coupled two-phase flow model was set up to track a large number of injected particles. The boundary conditions were defined based on experimental sensor data. A single-factor factorial experiment was conducted to investigate the influence of sheath gas flow rate (ShGFR) on line morphology, and also validate the CFD model.
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Daqing, Zhou, Zheng Yuan, and Xinfeng Ge. "CFD Simulation of the Whole Pump Station Inlet Flow Field." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55235.

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Wu-Hao-Gou pump station is one of many pump stations being going to build in order to meet the increasing need of water supply in the Shanghai city. Owing to limited building site, large discharge and multi water outlet direction, the design and arrangement of hydraulic structure become more difficult than usual pump station. In the paper, CFD method is used to simulate the whole inlet flow field and improve hydraulic performance of the pump station. Firstly, the whole hydraulic structure geometric model, combined by Penstock, transition passage, diversion channel, fore bay, suction bay and suction pipe, is built and subdivided with unstructured mesh. Secondly, inlet flow field of the original pump station scheme is simulated and analyzed with the SIMPLEC algorithm, the realizable k-ε turbulence model and the symmetric boundary hypothesis on the free surface. Thirdly, the better scheme is calculated with the same numerical method after taking some effective measurements. Lastly, the better scheme is simulated with the VOF model, as well as the numerical results are compared with the above symmetric boundary hypothesis model to reveal the fact that the main flow character is similar but some flow details differ between the two free surface model. Then, the physical model experiment will be performed to verify the better scheme in the next step.
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Lu, K., M. Rezasoltani, M. T. Schobeiri, and J. C. Han. "A Combined Numerical and Experimental Study of the Effect of Non-Axisymmetric Contouring on Performance and Film Cooling Behavior of a Rotating Turbine Endwall." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25659.

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Applying a new non-axisymmetric endwall contouring technology introduced by Turbomachinery Performance and Flow Research Laboratory (TPFL) at Texas A&M University to the second rotor row of a three-stage research turbine, has shown that for a single rotor row a major turbine efficiency improvement can be achieved [1]. Motivated by these results, comprehensive numerical and experimental investigations on the TPFL research turbine were conducted to determine the impact of the endwall contouring on film cooling effectiveness. For this investigation, the first rotor row directly subjected to the purge flow injection was chosen to which the new contouring technology was applied. Performing an extensive RANS simulation by using the boundary conditions from the experiments, aerodynamics, performance and film cooling effectiveness studies were performed by varying the injection blowing ratio and turbine rotational speed. Performance measurements were carried out within a rotational speed range of 1800 to 3000 RPM. The corresponding CFD simulations were carried out for four rotational speeds, 2000, 2400, 2600, and 3000 rpm. Comparison of the RANS aerodynamics simulation with experiments reveals noticeable differences. Considering the film cooling effectiveness, major differences between experiment and numerical results were observed and discussed in the paper.
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