Thematische Bibliographien / Ansys Steady State Thermal

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Auswahl der wissenschaftlichen Literatur zum Thema „Ansys Steady State Thermal“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 1. Februar 2022

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Zeitschriftenartikel zum Thema "Ansys Steady State Thermal"

Peng, Ying. „Research of Thermal Analysis Collaboratively Using ANSYS Workbench and SolidWorks Simulation“. Applied Mechanics and Materials 127 (Oktober 2011): 262–66. http://dx.doi.org/10.4028/www.scientific.net/amm.127.262.

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This paper introduces the basic theory of thermal analysis and the use of SolidWorks Simulation and ANSYS Workbench to complete the steady-state thermal analysis about related models, thus getting steady temperature distribution of the model. By comparing the differences between SolidWorks Simulation and ANSYS Workbench, we can finally work out the optimal method for product design and simulation .

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Chen, Kai Kang, Fu Ping Li und Yong Sheng Zhao. „FEA of Thermal Characteristic of Motorized Spindle Based on ANSYS Workbench“. Applied Mechanics and Materials 437 (Oktober 2013): 36–41. http://dx.doi.org/10.4028/www.scientific.net/amm.437.36.

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Thermal deformation of high-speed motorized spindle has an important effect on improving the machining accuracy. In this paper the thermal boundary conditions of thermal deformation, including the heat generation of the motor and bearing and heat transfer coefficient, are calculated to simulate the steady-state temperature field distribution, transient thermal analysis and thermal deformation in ANSYS Workbench. They provide theoretically the data for the thermal error compensation of the spindle system.

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Shi, Yan Yan, Lin Li, Xiang Feng Kong, Jin Hua Li und Hong Sun. „Study on the Steady State Thermal Analysis Method of Accessory Transmission System“. Applied Mechanics and Materials 198-199 (September 2012): 162–66. http://dx.doi.org/10.4028/www.scientific.net/amm.198-199.162.

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The mathematical model of steady state thermal analysis of accessory transmission system is built according to heat transfer theory, the governing equation functional of the steady state temperature field of accessory transmission system is derived on the basis of the variation principle, and the method to calculate the steady state temperature field of accessory transmission system is proposed with the finite element software ANSYS and its secondary switching language APDL. The result shows that the prediction of temperature field fit in with the heat flow law, then the correctness and validity of the proposed thermal analysis method is verified.

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Yuan, Hui Qun, und Chol Nam Ri. „Modal Analysis of Gear Considering Temperature Based on ANSYS“. Advanced Materials Research 482-484 (Februar 2012): 1209–12. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.1209.

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In this paper, regarding a spur gear as the object, the natural characteristics under thermal effect are calculated by using ANSYS. Firstly, taking the friction heat and convection heat as the thermal loads, the gear is analyzed under a steady state temperature. Secondly, taking the thermal stress into account, the natural frequencies are calculated. Comparing the natural frequencies between change and without change of temperature. The result of this study shows that the thermal stress produced by the variation of temperature is the main reason of natural frequency change.

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Muhi, Mohsin Obaid. „Effect of Sample Length on the Time Needed to Reach the Steady State Case“. Journal of University of Babylon for Engineering Sciences 27, Nr. 2 (28.05.2019): 171–82. http://dx.doi.org/10.29196/jubes.v27i2.2306.

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In this study, ANSYS-14 was used to study the effect of the length of the sample on the time needed to reach steady state (S.S.t) for the transient heat transfer. Three samples were studied in different lengths (15, 30 and 45 cm), 2 cm high, in addition to the selection of three materials with different thermal properties and applied to different lengths. One side of the three samples was exposed to a temperature at 100 ° C, while the other side was exposed to thermal load at 25 ° C and the sample was isolated from the top and bottom surfaces. The objective of this study is to determine the effect of the time reach to the steady state when changing the length of the sample exposed to constant thermal load and materials, depending on the distance from the hot face of all lengths at a number of points (3, 6, 9 and 12) cm. From the results of the time obtained numerically from the ANSYS-14 program, the time to reach the steady state was determined when the difference between the sample temperature reached with the previous grade of 0.001.The results indicated that the time required to reach the steady state (S.S.t) increases by increasing the length of the sample in the selected points when constant thermal diffusivity (α) ,where the time needed to reach the steady state of the copper material ranged between (879-1085) seconds at a length of 15 cm and (2112- 3005) seconds at length 30 cm and (2871-4937) seconds at a length of 45 cm as well as the results showed that the time required to reach the steady state increased with the thermal diffusivity decrease where the time required to reach the steady state of the copper of the highest thermal diffusivity ranged between (879-4937) seconds for all lengths while the time required to reach the steady state of the material of the lowest thermal diffusivity (hardboard) is between (168400-1078000) seconds.

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Wang, Jian Xin, und Tong Zhang. „Strength Analysis of Miniature Thermoacoustic Refrigerator Resonance Tube Based on ANSYS“. Advanced Materials Research 926-930 (Mai 2014): 2578–81. http://dx.doi.org/10.4028/www.scientific.net/amr.926-930.2578.

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Using fluid analysis software Fluent6.3 to numerical analysis of thermoacoustic refrigerator, and have a conclusion of the temperature distribution and pressure distribution of resonance tube when the refrigerator is stable. The temperature and pressure as the initial conditions applied in the refrigerator to thermal stress analysis, and find the stress distribution in the steady state resonance tube.

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Gabriel Kristian Tarigan, Ardyanta. „Designing new pot design using Ansys steady state thermal to reach 215 ka pot technology“. IOP Conference Series: Materials Science and Engineering 801 (03.06.2020): 012129. http://dx.doi.org/10.1088/1757-899x/801/1/012129.

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Lu, Chao. „Analysis on Thermal Fatigue Fracture on Engine Exhaust Manifold Based on ANSYS“. Advanced Materials Research 217-218 (März 2011): 1531–35. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1531.

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The thermal fatigue fracture of engine exhaust manifold will affect its service life and engine work, to prevent and resolve this problem, finite element analysis software ANSYS was used to establish a finite element model for exhaust manifold work environment, and calculate the steady-state temperature distribution under the thermal field. Through the thermal stress analysis of manifold, identified the region most prone to the generate thermal stress and fracture, conducted failure analysis, for the existing problems analyzed the reason of thermal fatigue fracture on exhaust manifold, and provided a reliable basis for the optimization of the exhaust manifold. The thermal fatigue failure of exhaust manifold got good improvement after the structure improvement.

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Nie, Xue Jun. „Spindle Thermal Analysis of CNC Milling Machine“. Advanced Materials Research 765-767 (September 2013): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.88.

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In this paper, the spindles thermal characteristics of CNC milling machine in steady state and transient state are analyzed by using ANSYS, the temperature field and thermal deformation field are obtained. After a number of tests are done in different working conditions, the temperature and thermal deformation changes of spindle are measured in every working condition. Combing the FEM analysis with tests results, the thermal deformation of spindle from starting to reach thermal balance on CNC milling machine is discussed, some suggestions are presented to improve the process precision of CNC milling machine.

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Liu, Liang, Zheng Lin Liu, Jun Wang und En Gao Peng. „Coupled Thermal-Structural Analysis of Mechanical Seal“. Advanced Materials Research 479-481 (Februar 2012): 1110–14. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.1110.

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Based on ANSYS software and combined with the theory trends on stern shaft seal performance, the steady-state thermal structure coupling and transient thermal structure coupling analysis of stern shaft mechanical seal had been carried on. It showed that the transient thermal structure coupling analysis was more close to the actual condition of stern shaft seal. The result of transient state analysis indicated the thermal-mechanical effect on seal face during starting, and showed that the contact area was decreased especially the temperture rise rapidly inside of the seal.

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Dissertationen zum Thema "Ansys Steady State Thermal"

Valluru, Srividya. „Steady state thermal stress analyses of two-dimensional and three-dimensional solid oxide fuel cells“. Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3887.

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Thesis (M.S.)--West Virginia University, 2005.
Title from document title page. Document formatted into pages; contains ix, 138 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 90-94).

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Němec, Petr. „Měnič pro BLDC motor“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442792.

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The goal of this Master thesis is to design a power convertor for BLDC motor 48V/2kW. Emphasis is placed on the small dimensions of the final printed circuit board. Therefore, power SMD transistors STL135N8F7AG are used in small packages PowerFlat 5x6. To reduce area of the PCB, electrolytic capacitors are mounted on a separate board, which is located above the main PCB. Small high-capacity 22F/100V ceramic capacitors are used in the DC-LINK as well. They are located as close as possible to the power SMD tranzistors. Control logic will be provided by microprocesor STM32G474RE. High resolution timer HRTIM1 is used. The first part of this thesis is devoted to the brief description of BLDC motor construction and driving. Next parts are focused on the design itself.

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Ferroni, Paolo Ph D. Massachusetts Institute of Technology. „Steady state thermal hydraulic analysis of hydride fueled BWRs“. Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/41263.

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Includes bibliographical references (p. 205-208).
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2006.
(cont.) Since the results obtained in the main body of the analysis account only for thermal-hydraulic constraints, an estimate of the power reduction due to the application of neutronic constraints is also performed. This investigation, focused only on the "New Core" cases, is coupled with an increase of the thickness of the gap separating adjacent bundles from 2 to 5 mm. Under these more conservative conditions, the power gain percentages are lower, ranging between 24% and 43% (depending on the discharge burnup considered acceptable) for the upper pressure drop limit, and between 17% and 32% for the lower pressure drop limit.
(cont.) The benefits of the latter approach are evident since the space occupied by the bypass channel for cruciform control rod insertion becomes available for new fuel and a higher power can be achieved. The core power is constrained by applying thermal-hydraulic limits that, if exceeded, may induce failure mechanisms. These limits concern Minimum Critical Power Ratio (MCPR), core pressure drop, fuel average and centerline temperature, cladding outer temperature and flow-induced vibrations. To limit thermal-hydraulic instability phenomena, core power and coolant flow are constrained by fixing their ratio to a constant value. In particular, each BWR/5 core has been analyzed twice, each time with a different pressure drop limit: a lower limit corresponding to the pressure drop of the reference core and an upper limit 50% larger. It has been demonstrated that, in absence of neutronic constraints and with the maximum allowed pressure drop fixed at the upper limit, the implementation of the hydride fuel yields power gain percentages, with respect to oxide cores chosen as reference, of the order of 23% when its implementation is performed following the "Backfit" approach and even higher (50-70%) when greater design freedom is allowed in the core design, i.e. in the "New Core" approach. Should the maximum allowed pressure drop be fixed at the lower limit, the power gain percentage of the "Backfit" approach would decrease to 17%, while that of the "New Core" approach would remain unchanged, i.e. 50-70%.
This thesis contributes to the Hydride Fuel Project, a collaborative effort between UC Berkeley and MIT aimed at investigating the potential benefits of hydride fuel use in Light Water Reactors (LWRs). Considerable work has already been accomplished on hydride fueled Pressurized Water Reactor (PWR) cores. This thesis extends the techniques used in the PWR analysis to examine the potential power benefits resulting from the implementation of the hydride fuel in Boiling Water Reactors (BWRs). This work is the first step towards the achievement of a complete understanding of the economic implications that may derive from the use of this new fuel in BWR applications. It is a whole core steady-state analysis aimed at comparing the power performance of hydride fueled BWR cores with those of typical oxide-fueled cores, when only thermal-hydraulic constraints are applied. The integration of these results with those deriving from a transient analysis and separate neutronic and fuel performance studies will provide the data required to build a complete economic model, able to identify geometries offering the lowest cost of electricity and thus to provide a fair basis for comparing the performance of hydride and oxide fuels. Core design is accomplished for two types of reactors: one smaller, a BWR/5, which is representative of existing reactors, and one larger, the ESBWR, which represents the future generation of BWRs. For both, the core design is accomplished in two ways: a "Backfit" approach, in which the ex-bundle core structure is identical to that of the two reference oxide cores, and a "New Core" approach, in which the control rods are inserted into the bundles in the form of control fingers and the gap between adjacent bundles is fixed optimistically at 2 mm.
by Paolo Ferroni.
S.M.

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Huning, Alexander. „A steady state thermal hydraulic analysis method for prismatic gas reactors“. Thesis, Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52196.

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A new methodology for the accurate and efficient determination of steady state thermal hydraulic parameters for prismatic high temperature gas reactors is developed. Two conceptual reactor designs under investigation by the nuclear industry include the General Atomics GT-MHR and the Department of Energy MHTGR-350. Both reactors use the same hexagonal prismatic block, TRISO fuel compact, and circular coolant channel array design. Steady state temperature, pressure, and mass flow distributions are determined for the base reference designs and also for a range of values of the important parameters. Core temperature distributions are obtained with reduced computational cost over more highly detailed computational fluid dynamics codes by using efficient, correlations and first-principles-based approaches for the relevant thermal fluid and thermal transport phenomena. Full core 3-D heat conduction calculations are performed at the individual fuel pin and lattice assembly block levels. The fuel compact is treated as a homogeneous medium with heat generation. A simplified 1-D fluid model is developed to predict convective heat removal rates from solid core nodes. Downstream fluid properties are determined by performing a channel energy balance down the axial node length. Channel exit pressures are then compared and inlet mass flows are adjusted until a uniform outlet pressure is reached. Bypass gaps between assembly blocks as well as coolant channels are modeled. Finite volume discretization of energy, and momentum conservation equations are then formed and explicitly integrated in time. Iterations are performed until all local core temperatures stabilize and global convective heat removal matches heat generation. Several important observations were made based on the steady state analyses for the MHTGR and GT-MHR. Slight temperature variation in the radial direction was observed for uniform radial powers. Bottom-peaked axial power distributions had slightly higher peak temperatures but lower core average temperatures compared to top and center-peaked power distributions. The same trend appeared for large bypass gap sizes cases compared to smaller gap widths. For all cases, peak temperatures were below expected normal operational limits for TRISO fuels. Bypass gap flow for a 3 mm gap width was predicted to be between 10 and 11% for both reactor designs. Single assembly hydrodynamic and temperature results compared favorably with those available in the literature for similar prismatic HTGR thermal hydraulic, computational fluid dynamics analyses. The method developed here enables detailed local and core wide thermal analysis with minimal computational effort, enabling advanced coupled analyses of high temperature reactors with thermal feedback. The steady state numerical scheme also offers a potential for select transient scenario modeling and a wide variety of design optimization studies.

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Wiser, Travis Sloan. „Steady state heat transfer characterization of a liquid metal thermal switch“. Online access for everyone, 2005. http://www.dissertations.wsu.edu/Thesis/Summer2005/T%5FWiser%5F062205.pdf.

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Hioe, Yunior. „Mold thermal design and quasi steady state cycle time analysis in injection molding“. Connect to resource, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1141840509.

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Marshallsay, P. G. „A methodology for modelling the steady-state thermal performance of air conditioning systems /“. Title page, contents and abstract only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phm3692.pdf.

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Madrid, Lozano Francesc. „Thermal Conductivity and Specific Heat Measurements for Power Electronics Packaging Materials. Effective Thermal Conductivity Steady State and Transient Thermal Parameter Identification Methods“. Doctoral thesis, Universitat Autònoma de Barcelona, 2005. http://hdl.handle.net/10803/5348.

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Derakhshan, Jamal Jon. „Innovations Involving Balanced Steady State Free Precession MRI“. Cleveland, Ohio : Case Western Reserve University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=case1247256364.

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Thesis (Ph.D.)--Case Western Reserve University, 2009
Title from PDF (viewed on 19 August 2009) Department of Biomedical Engineering Includes abstract Includes bibliographical references Available online via the OhioLINK ETD Center

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Lindén, Ronja, und Henrik Samuelsson. „Thermal analysis and design improvement of light module fixture“. Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-30485.

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Introduction One of the products made by SAAB Avionics Systems in Jönköping was in need of a better cooling solution. The product, a Head-Up Display, holds a LED that was overheating when run at desired input power. The purpose of this thesis was to identify the design weaknesses in the current solution regarding heat dissipation and produce new design proposals that fulfill the requirements. The parts analyzed consist of a LED light source, adjustment plates and a heat sink. The adjustment plates and heat sink where covered in a surface treatment. Theoretical framework A simulation of a finite element model was set up of the current solution in order to identify the influence of the different parts and their thermal properties. The simulation was set up as a steady state thermal model. The FEM and steady state equations used during this are mentioned and shortly explained. The state of modern research was found in order to find new innovative ways of solving the heat problem. Method In order to understand the current solution, experimentswere carried out. Interviews were used in order to get the correct information easily. A literature study was preformed to understand the different theories. Reverse engineering was applied to get a detailed understanding of the functionality both mechanically and thermally. Brainstorming was used to generate new solutions, which was followed by a feasibility evaluation and Pugh’s method to sort out the best concepts. Implementation and Result Based on the simulations it can be concluded that some of the developed solutions pass the requirements and can be implemented right away. Some need some more work in order to fully pass the demands. Conclusions The thermal flow was greatly affected by the properties of the aluminum in the adjustment plates and heat sink, though there was not much room for thickness reduction. However, the oxide layer and the surface roughness also had a great impact on the high junction temperature. The requirements where therefore met when adjustment plates and interfaces were removed, to lower the amount of oxide and air between the LED and the heat sink. But the oxide layers needed to be thinner and the surface roughness needed to be reduced in order to meet requirements. If the oxide layers need to stay at current thickness or the surface roughness cannot be changed, the heat sink needs to be redesigned. The recommended concepts were smaller than the current solution. If this space is utilized with a bigger heat sink, the goals can be met with greater ease. There is also room for improvement when it comes to heat sink heat spreader pattern. Discussion The discussion covers what knowledge which was needed to write this thesis and how different problems that occurred along its path were solved. Sustainability in different ways was also discussed.

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Bücher zum Thema "Ansys Steady State Thermal"

Freed, Alan David. Steady-state and transient zener parameters in viscoplasticity: Drag strength versus yield strength. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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Chandra, G. Sachin. Measurement of thermal conductivity of liquids at temperatures and pressures along the saturation line using a steady state a.c. hot wire technique. Birmingham: University of Birmingham, 1990.

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P, Walker K., und United States. National Aeronautics and Space Administration., Hrsg. Steady-state and transient zener parameters in viscoplasticity: Drag strength versus yield strength. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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Integrated Advanced Microwave Sounding Unit-A (AMSU-A), engineering test report, AMSU EOS A1 thermal balance test correlation: Contract no. NAS 5-32314. [Washington, DC: National Aeronautics and Space Administration, 1998.

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Thermal-structural finite element analysis using linear flux formulation. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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Pramote, Dechaumphai, Wieting A. R und Langley Research Center, Hrsg. Thermal-structural finite element analysis using linear flux formulation. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1990.

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J, Petrus G., Krauss T. M und United States. National Aeronautics and Space Administration., Hrsg. Modeling of thermal barrier coatings: Final report. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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A, Berna Gary, und U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Technology., Hrsg. FRAPCON-3: A computer code for the calculation of steady state thermal-mechanical behavior of oxide fuel rods for high burnup. Wasington, DC: The Commission, 1997.

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Technical Committee ISO/TC 38, Textiles. und International Organization for Standardization, Hrsg. Textiles: Physiological effects : measurement of thermal and water-vapour resistance under steady-state conditions : sweating guarded-hotplate test = Textiles : effets physiologique : mesurage de la résistance thermique et de la résistance à la vapour d'eau en régime stationnaire : essai de la plaque chaude gardée transpirante. Genève, Switzerland: International Organization for Standardization, 1993.

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Buchteile zum Thema "Ansys Steady State Thermal"

An, Chen, Menglan Duan, Segen F. Estefen und Jian Su. „Steady-State Thermal Analysis“. In Structural and Thermal Analyses of Deepwater Pipes, 183–90. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53540-7_13.

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Koniorczyk, Piotr, und Janusz Zmywaczyk. „Two-Dimensional, Steady-State Conduction“. In Encyclopedia of Thermal Stresses, 6260–77. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_418.

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Trojan, Marcin. „One-Dimensional, Steady-State Heat Conduction“. In Encyclopedia of Thermal Stresses, 3483–98. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_401.

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Brock, Louis, und Haralambos Georgiadis. „Rapid Sliding Contact: Elastodynamic Steady State“. In Encyclopedia of Thermal Stresses, 4102–8. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_689.

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Koniorczyk, Piotr, und Janusz Zmywaczyk. „Two-Dimensional, Steady-State Conduction: Tables“. In Encyclopedia of Thermal Stresses, 6277. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_2003.

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Frąckowiak, Andrzej, und Michał Ciałkowski. „Green’s Functions in Steady-State Heat Conduction“. In Encyclopedia of Thermal Stresses, 2053–61. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_387.

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Keer, Leon M., und Noah Weiss. „Steady State Heat Flow into Concentrated Contact“. In Encyclopedia of Thermal Stresses, 4559–64. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_138.

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Keer, Leon M., und Noah Weiss. „Steady State Heat Flow and Isolated Crack“. In Encyclopedia of Thermal Stresses, 4553–59. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_153.

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An, Chen, Menglan Duan, Segen F. Estefen und Jian Su. „Steady-State Analysis of Heavy Oil Transportation“. In Structural and Thermal Analyses of Deepwater Pipes, 191–96. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53540-7_14.

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Mahadevan-Jansen, Anita, und Steven C. Gebhart. „Steady State Fluorescence Spectroscopy for Medical Diagnosis“. In Optical-Thermal Response of Laser-Irradiated Tissue, 761–98. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8831-4_20.

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Konferenzberichte zum Thema "Ansys Steady State Thermal"

Mueller, Andre, Christian Buennagel, Shafiul Monir, Andrew Sharp, Yuriy Vagapov und Alecksey Anuchin. „Numerical Design and Optimisation of a Novel Heatsink using ANSYS Steady-State Thermal Analysis“. In 2020 27th International Workshop on Electric Drives: MPEI Department of Electric Drives 90th Anniversary (IWED). IEEE, 2020. http://dx.doi.org/10.1109/iwed48848.2020.9069568.

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Batchu, Suresh, und S. Kishore Kumar. „Steady State Thermal Analysis of an Afterburner Liner“. In ASME 2013 Gas Turbine India Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gtindia2013-3615.

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Military aero engines employ afterburner system for increasing the reheat thrust required during combat and takeoff. During reheat the gas temperature in the afterburner is of the order of 2100K.The afterburner liner has to be cooled with the available bypass air to maintain metal temperature within allowable limits. The liner has cooling rings at the rear to cool the liner with tangential film cooling. This paper discusses the methodology of afterburner liner metal temperature prediction and comparison with measured metal temperature during aero engine testing at reheat condition. All the modes of heat transfer are considered for thermal analysis, radiation due to higher level of gas temperature during reheat, conduction due to presence of low conductivity thermal barrier coating and convection due to higher gas velocities are considered. At different steady state reheat conditions metal temperature are predicted and compared with measured data during aero engine testing. The predicted skin temperatures and measured temperatures are in good agreement. Empirical correlations are used for estimating the heat loads coming on the liner and adiabatic film temperature near screech holes and cooling rings. Metal temperature and thermal loads coming onto the liner are predicted with 1D code. The estimated thermal loads are applied on 3D FE model to obtain nodal temperature distribution. The thermal Analysis is carried using ANSYS software in which thermal barrier coating is also modeled. The parameters like gas temperature, thermal barrier coating thickness, coating conductivity, and coolant mass flow distribution are considered for carrying out a sensitivity analysis of liner metal temperature.

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Li, Linsen, Haomin Yuan und Kan Wang. „The Modelling and Coupling Methodology of ANSYS CFX Using Porous Media for PB-AHTR“. In 2013 21st International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icone21-16687.

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This paper introduces a first-principle steady-state coupling methodology using the Monte Carlo Code RMC and the CFD code CFX which can be used for the analysis of small and medium reactors. The RMC code is used for neutronics calculation while CFX is used for Thermal-Hydraulics (T-H) calculation. A Pebble Bed-Advanced High Temperature Reactor (PB-AHTR) core is modeled using this method. The porous media is used in the CFX model to simulate the pebble bed structure in PB-AHTR. This research concludes that the steady-state coupled calculation using RMC and CFX is feasible and can obtain stable results within a few iterations.

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Rajiyah, Harindra, Louis P. Inzinna, Gerald G. Trantina, Robert M. Orenstein und Martin B. Cutrone. „Thermal Shock Analysis and Testing of Simulated Ceramic Components for Gas Turbine Applications“. In ASME 1995 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/95-gt-308.

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A ceramic gas seal for a utility gas turbine was designed and analyzed using ANSYS and CARES/LIFE. SN-88 silicon nitride was selected as the candidate material. The objective was to validate the failure prediction methodology using rectangular plates which were thermally shocked in a fluidized bed. The failure prediction methodology would then be applied to the representative component geometry. Refined ANSYS finite element modeling of both the plate and component geometries was undertaken. The CARES/LIFE reliability analysis of the component geometry for fast fracture was performed for two cases: I) steady-state thermo-mechanical loads during normal gas turbine operation and II) transient thermal shock loading during a turbine trip. Thermal shock testing of alumina disks were performed in order to gain confidence in the testing and analysis procedures. Both notched and unnotched SN88 plates were then tested. Failure modes were identified through flexure tests and data censoring was performed using SAS. Weibull modulus was assumed to be invariant with temperature and the scale parameter was assumed to vary through a scaling variable such that multiple data could be pooled.

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Brilliant, Howard M., und Anil K. Tolpadi. „An Improved Analytical Approach to Steam Turbine Heat Transfer“. In ASME 2004 Power Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/power2004-52002.

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Improvements to the design of advanced steam turbines require an improved understanding of the heat transfer within the various components of the unit. Physics-based ANSYS models for typical high pressure and intermediate pressure units have been developed. The boundary conditions were derived from full-load, steady state flow analyses, steam turbine performance code outputs and computational fluid dynamics (CFD) analyses to develop normalized (non-dimensional) local flow conditions, with the normalizing parameters based on key cycle parameters. These normalized local flow conditions and cycle parameters were then used to define local transient boundary temperatures and heat transfer coefficients for input to the thermal ANSYS model. Transient analyses of components were performed. The results were compared with temperature measurements taken during the operating cycle of an operational steam turbine to validate and improve the methodology and were applied to structural models of the components to predict their thermal growth and the net impact on the clearance between the rotor and diaphragms and other secondary flow paths in the steam turbine, including seals.

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Lück, Hannes, Michael Schäfer und Heinz-Peter Schiffer. „Simulation of Thermal Fluid-Structure Interaction in Blade-Disc Configuration of an Aircraft Turbine Model“. In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-26316.

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This paper describes the impact of structural deformations on interstage cavity flow dynamics by adopting thermal fluid-structure interaction methods. These coupled numerical approaches solve the fluid-solid heat transfer in conjunction with the geometrical deformation due to mismatched centrifugal and thermal expansion of rotating and stationary turbine discs. Especially the changing clearances at the interstage labyrinth seal, at the rotor blade tips and at the rotor stator rim seals can be captured to calculate the correct flow physics at these locations. A manual explicit coupling approach in ANSYS is utilized that couples the CFX CHT solver with the FE solver Mechanical. The validation of a 3D sector model with experimental data shows improvements in predicting the metal temperature of the rotating walls but also disclose problems with the overheated stationary parts, mainly due to the utilization of steady state mixing planes. Additionally, a surrogate 2D model of the 3D model is introduced to compare the explicit coupling approach with an implicit approach exploiting the ANSYS MFX interface between the fluid and the solid domain. Thereby, the manual coupling approach reveals to be much more efficient for the examined thermal fluid-structure interaction.

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Buonomo, Bernardo, Furio Cascetta, Alessandra Diana, Oronzio Manca und Sergio Nardini. „Numerical Investigation on Thermal and Fluid Dynamic Analysis of a Solar Chimney in a Building Façade“. In ASME 2019 Heat Transfer Summer Conference collocated with the ASME 2019 13th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ht2019-3612.

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Abstract Solar chimney is a system to produce energy and it has several applications, such as production of electricity, buildings ventilation, heating and cooling. In this paper, a numerical investigation on a prototypal solar chimney system integrated in a south facade of a building is presented. The chimney is 4.0 m high, 1.5 m wide whereas the thickness at the inlet the channel has a gap equal to 0.34 m and at the outlet it is 0.20 m. The chimney consists of a converging channel with one vertical wall and one inclined of 2°. The analysis is carried out on a three-dimensional model in airflow and the governing equations are given in terms of k-ε turbulence model. The problem is solved by means of the commercial code Ansys-Fluent. Simulations are carried out considering the solar irradiance for assigned geographical location and for a daily distribution. Further, comparison between steady state and transient regimes is examined and discussed. Results are given in terms of wall temperature distributions, air velocity and temperature fields and transversal profiles. Performances are better when heat flux is higher and sun is in front of chimney and a low-emissivity glass improves solar chimney achievements. Analysis in transient regimes confirm results obtained in steady state regime.

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McMasters, Robert L., Filippo de Monte, Giampaolo D'Alessandro und James V. Beck. „Verification of ANSYS and Matlab Conduction Results Using Analytical Solutions“. In ASME 2020 Heat Transfer Summer Conference collocated with the ASME 2020 Fluids Engineering Division Summer Meeting and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ht2020-8970.

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Abstract A two-dimensional transient thermal conduction problem is examined and numerical solutions to the problem generated by ANSYS and Matlab, employing the finite element method, are compared against an analytical solution. Various different grid densities and time-step combinations are used in the numerical solutions, including some as recommended by default in the ANSYS software, including coarse, medium and fine spatial grids. The transient temperature solutions from the analytical and numerical schemes are compared at four specific locations on the body and time-dependent error curves are generated for each point. Additionally, tabular values of each solution are presented for a more detailed comparison. The errors found in the numerical solutions by comparing them directly with the analytical solution vary depending primarily on the time step size used. The errors are much larger if calculated using the analytical solution at a given time as a basis of the comparison between the two solutions as opposed to using the steady-state temperature as a basis. The largest errors appear in the early time steps of the problem, which is typically the regime wherein the largest errors occur in mathematical solutions to transient conduction problems. Conversely, errors at larger values of dimensionless time are extremely small and the numerical solutions agree within one tenth of one percent of the analytical solutions at even the worst locations. In addition to difficulties during the early time values of the problem, temperatures calculated on convective boundaries or prescribed-heat-flux boundaries are locations generating larger-magnitude errors. Corners are particularly difficult locations and require finer gridding and finer time steps in order to generate a very precise solution from a numerical code. These regions are compared, using several grid densities, against the analytical solutions. The analytical solutions are, in turn, intrinsically verified to eight significant digits by comparing similar analytical solutions against one another at very small values of dimensionless time. The solution developed using the Matlab differential equation solver was found to have errors of a similar magnitude to those generated using ANSYS. Two different test cases are examined for the various numerical solutions using the selected grid densities. The first case involves steady heating on a portion of one surface for a long duration, up to a dimensionless time of 30. The second test case involves constant heating for a dimensionless time of one, immediately followed by an insulated condition on that same surface for another duration of one dimensionless time unit. Although the errors at large times were extremely small, the errors found within the short duration test were more significant.

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Alfaro-Ayala, J. A., A. Gallegos-Mun˜oz, A. Olivares-Arriaga, A. Zaleta-Aguilar und J. J. Vazquez Martinez. „Thermal-Structural Analysis of the Super-Heater Tubes of a Unit of 158 MW“. In ASME 2011 Power Conference collocated with JSME ICOPE 2011. ASMEDC, 2011. http://dx.doi.org/10.1115/power2011-55124.

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The thermal-structural analysis of the super-heater tubes for a 158 MW unit, applying FLUENT® (CFD) and ANSYS® (FEA), is presented. The analysis includes the spacers (union piece between tubes), welding and tubes. The failures of these elements are related with the operation of the unit and the selection of the weld and materials involved in the affected zone. The distribution of temperature in each metal depends of the thermal conductivity and coefficient of thermal expansion, provoking stress concentration in the rigid zones. The CFD study considers a three-dimensional model where the conjugate heat transfer, including internal flow (steam) and external flow (gases), was analyzed to full load of the unit in steady state. In the FEA study, the thermal-structural stresses were analyzed considering the temperature distribution obtained from the CFD study. The results obtained show that the spacer is of greater temperature than the tubes, provoking gradients of temperature through tube walls, spacers and welds. The highest stress located on the interior tube wall (on the direction of plane where the spacer is welded) is attributed to the different thermal dilatation and pressure expansion of the tube, spacer and weld. The study includes the analysis of some geometries of the union piece (spacer) to release the thermal-structural stresses.

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Talimi, V., Y. S. Muzychka und S. Kocabiyik. „A Numerical Study on Shear Stress and Heat Transfer of Segmented Flow Between Parallel Plates“. In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58237.

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The shear stress and heat transfer of moving liquid slugs between two parallel plates are studied numerically. The problem is solved initially as a steady state problem for the velocity field and shear stress, and then, the thermal problem is solved. The thermal boundary condition is constant wall temperature. The fluid properties are assumed to be constant. The finite volume method is applied using the ANSYS Fluent software package. The results show good agreement with the published literature. Effects of different interface shapes (contact angles) on wall shear stress and heat transfer is discussed. Dimensionless heat transfer plots are also presented.

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Berichte der Organisationen zum Thema "Ansys Steady State Thermal"

Feldman, E. Fundamental approach to TRIGA steady-state thermal-hydraulic CHF analysis. Office of Scientific and Technical Information (OSTI), März 2008. http://dx.doi.org/10.2172/929269.

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Yoder, G. L., J. J. Carbajo, D. G. Morris und W. R. Nelson. Update to advanced neutron source steady-state thermal-hydraulic report. Office of Scientific and Technical Information (OSTI), Mai 1996. http://dx.doi.org/10.2172/283708.

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Licht, J. R., A. Bergeron, B. Dionne, G. Van den Branden, S. Kalcheva, E. Sikik und E. Koonen. Steady-State Thermal-Hydraulics Analyses for the Conversion of the BR2 Reactor to LEU. Office of Scientific and Technical Information (OSTI), Dezember 2015. http://dx.doi.org/10.2172/1240155.

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Vilim, R. B., und R. N. Hill. The steady-state thermal-hydraulic performance of 3500 MWth metal and oxide fueled LMRs. Office of Scientific and Technical Information (OSTI), März 1989. http://dx.doi.org/10.2172/6114932.

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Morris, D. G., N. C. Chen, W. R. Nelson und G. L. Yoder. Description of TASHA: Thermal Analysis of Steady-State-Heat Transfer for the Advanced Neutron Source Reactor. Office of Scientific and Technical Information (OSTI), Oktober 1996. http://dx.doi.org/10.2172/454005.

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Hayes, S. L. SAFE: A computer code for the steady-state and transient thermal analysis of LMR fuel elements. Office of Scientific and Technical Information (OSTI), Dezember 1993. http://dx.doi.org/10.2172/140916.

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Wharry, Janelle, und Won Sik Yang. Steady-State Thermal-Hydraulic Analysis and Bowing Reactivity Evaluation Methods Based on Neutron and Gamma Transport Calculations. Office of Scientific and Technical Information (OSTI), Dezember 2018. http://dx.doi.org/10.2172/1493700.

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Olson, Arne P., Benoit Dionne, John G. Stevens, S. Kalcheva, G. Van den Branden und E. Koonen. Steady-state thermal-hydraulics feasibility study for the conversion of the BR2 reactor to LEU. Revision 0. Office of Scientific and Technical Information (OSTI), November 2011. http://dx.doi.org/10.2172/1214238.

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Dunn, Floyd E., Lin-wen Hu und Erik Wilson. The STAT7 Code for Statistical Propagation of Uncertainties In Steady-State Thermal Hydraulics Analysis of Plate-Fueled Reactors. Office of Scientific and Technical Information (OSTI), Dezember 2016. http://dx.doi.org/10.2172/1349053.

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