Large eddy simulations of side flow past a generic model of a high-speed train

Kin, Natalia, Deiterding, Ralf and Wagner, Claus (2016) Large eddy simulations of side flow past a generic model of a high-speed train. In, Dillmann, Andreas (ed.) New Results in Numerical and Experimental Fluid Mechanics X. (Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 132) Berlin, DE. Springer, pp. 421-431. (doi:10.1007/978-3-319-27279-5_37).

Record type: Book Section

Abstract

Computational fluid dynamics (CFD) has been utilized to investigate straight and side flow over a simplified model of the concept high-speed Next Generation Train of the DLR. Large eddy simulation (LES) with a finite volume method for unstructured grids and a lattice Boltzmann method (LBM) were performed to compare the results. The Reynolds number of the flow was Re=2.1×10^5 and the investigated yaw angle was 30 degrees. The flow fields and the aerodynamic forces predicted with these two different methods are compared for the validation case of the flow past a sphere and the flow around the generic train model. Both approaches yield similar force predictions and exhibit different strengths and weaknesses throughout the computational process which are discussed.

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