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M. Bujny, A.B. Jaworski, J. Rokicki, "Aerodynamic Shape Optimisation of a High Speed Train Locomotive using Adjoint Solver", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 39, 2014. doi:10.4203/ccp.104.39

Keywords: adjoint methods, gradient optimisation, high-speed trains, shape optimisation, mesh morphing, radial basis functions.

Summary

Computational fluid dynamics tools are routinely used in the analysis of high speed train aerodynamics. Shape optimisation methods can further improve the aerodynamic performance although the major limitation remains the computational cost. One may consider to limit the computational effort by reducing the accuracy of numerical model but this may affect the optimisation result. Another solution is to use gradient based optimisation together with a very efficient adjoint method. However, this requires an additional adjoint solver and parametrisation. In this paper a three-dimensional gradient based optimisation method is presented combined with a very efficient mesh parametrisation. The optimisation cost is limited to a few flow calculations by using a commercial adjoint solver for the gradient calculation. The performance of proposed optimisation approach is analysed using a numerical test case. It consists of the shape optimisation of a train locomotive with a pantograph using aerodynamic drag as a objective function.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 39 Aerodynamic Shape Optimisation of a High Speed Train Locomotive using Adjoint Solver M. Bujny, A.B. Jaworski and J. Rokicki Institute of Aeronautics and Applied Mechanics, Warsaw University of Technology, Poland doi:10.4203/ccp.104.39 purchase the full-text of this paper Full Bibliographic Reference for this paper M. Bujny, A.B. Jaworski, J. Rokicki, "Aerodynamic Shape Optimisation of a High Speed Train Locomotive using Adjoint Solver", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 39, 2014. doi:10.4203/ccp.104.39 Keywords: adjoint methods, gradient optimisation, high-speed trains, shape optimisation, mesh morphing, radial basis functions. Summary Computational fluid dynamics tools are routinely used in the analysis of high speed train aerodynamics. Shape optimisation methods can further improve the aerodynamic performance although the major limitation remains the computational cost. One may consider to limit the computational effort by reducing the accuracy of numerical model but this may affect the optimisation result. Another solution is to use gradient based optimisation together with a very efficient adjoint method. However, this requires an additional adjoint solver and parametrisation. In this paper a three-dimensional gradient based optimisation method is presented combined with a very efficient mesh parametrisation. The optimisation cost is limited to a few flow calculations by using a commercial adjoint solver for the gradient calculation. The performance of proposed optimisation approach is analysed using a numerical test case. It consists of the shape optimisation of a train locomotive with a pantograph using aerodynamic drag as a objective function. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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