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N. Kin¹, R. Deiterding¹ and C. Wagner²

¹Engineering and the Environment, University of Southampton, United Kingdom
²Institute for Aerodynamics and Flow Technology, German Aerospace Center, Goettingen, Germany

doi:10.4203/ccp.110.60

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N. Kin, R. Deiterding, C. Wagner, "Large Eddy Simulations of Side Flows past a Generic Model of a High-Speed-Train using a Finite Volume and a Lattice Boltzmann Method", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 60, 2016. doi:10.4203/ccp.110.60

Keywords: large eddy simulation, finite volume method, lattice Boltzmann method, high speed train, sphere, cross wind effects.

Summary

In the research, reported in this paper, large eddy simulations (LES) of the flow around a simplified model of the concept high-speed Next Generation Train (NGT) of the German Aerospace Center are performed using a lattice Boltzmann method (LBM) and a second order accurate finite volume method. The objective is to identify and compare the performance of both approaches with respect of the prediction of cross wind effects. In order to access the accuracy of both methods, simulations of the flow around a sphere are performed for Re=10⁴ prior to the LES of the flow around the generic NGT train with a yaw angle of thirty degrees and a Reynolds number of 2.1x10⁵. For all considered flow cases, the results are analysed with respect to instantaneous flow fields and the induced aerodynamic. The comparison reveals that the computational requirements for the LES with the LBM are lower while the LES with the FVM is more accurate in predicting the aerodynamic forces.

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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: 110 PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 60 Large Eddy Simulations of Side Flows past a Generic Model of a High-Speed-Train using a Finite Volume and a Lattice Boltzmann Method N. Kin¹, R. Deiterding¹ and C. Wagner² ¹Engineering and the Environment, University of Southampton, United Kingdom ²Institute for Aerodynamics and Flow Technology, German Aerospace Center, Goettingen, Germany doi:10.4203/ccp.110.60 purchase the full-text of this paper Full Bibliographic Reference for this paper N. Kin, R. Deiterding, C. Wagner, "Large Eddy Simulations of Side Flows past a Generic Model of a High-Speed-Train using a Finite Volume and a Lattice Boltzmann Method", in J. Pombo, (Editor), "Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 60, 2016. doi:10.4203/ccp.110.60 Keywords: large eddy simulation, finite volume method, lattice Boltzmann method, high speed train, sphere, cross wind effects. Summary In the research, reported in this paper, large eddy simulations (LES) of the flow around a simplified model of the concept high-speed Next Generation Train (NGT) of the German Aerospace Center are performed using a lattice Boltzmann method (LBM) and a second order accurate finite volume method. The objective is to identify and compare the performance of both approaches with respect of the prediction of cross wind effects. In order to access the accuracy of both methods, simulations of the flow around a sphere are performed for Re=10⁴ prior to the LES of the flow around the generic NGT train with a yaw angle of thirty degrees and a Reynolds number of 2.1x10⁵. For all considered flow cases, the results are analysed with respect to instantaneous flow fields and the induced aerodynamic. The comparison reveals that the computational requirements for the LES with the LBM are lower while the LES with the FVM is more accurate in predicting the aerodynamic forces. purchase the full-text of this paper (price £22) 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 £85 +P&P)
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