论文信息 - Effect of Turbulence Model on Simulation of Vehicle Aerodynamic Characteristics Based on XFlow

Effect of Turbulence Model on Simulation of Vehicle Aerodynamic Characteristics Based on XFlow

The stability, comfort and safety of vehicles depend largely on the aerodynamic characteristics of the vehicle in high speed. As the turbulence model plays a decisive factor in the numerical simulation of aerodynamic characteristics, a simulation analysis of Ahmed model with a slant angle of is carried out by the XFlow software. Then the paper presents the changes of aerodynamic parameters relative to the experimental values with four turbulence models: Spalart-Allmaras model, WALE model, Dynamic Smagorinsky model and Smagorinsky model. It is found that the result of simulation with Smagorinsky model is in good agreement with experimental value, and the simulation of the wake vortex separation is consistent with the actual phenomenon. The Smagorinsky turbulence model has a good simulation precision.

[1] Rainer Grauer,et al. Conditional Eulerian and Lagrangian velocity increment statistics of fully developed turbulent flow , 2011 .

[2] Anton Fuchs,et al. Experiments and numerical simulations on the aerodynamics of the Ahmed body , 2011 .

[3] Yan Zhou,et al. Turbulent near wake of an Ahmed vehicle model , 2013 .

[4] Federico Cheli,et al. Admittance function to evaluate aerodynamic loads on vehicles: Experimental data and numerical model , 2013 .

[5] Sinisa Krajnovic,et al. An efficient very large eddy simulation model for simulation of turbulent flow , 2013 .

[6] Arun R. Srinivasa,et al. A model for tracking inertial particles in a lattice Boltzmann turbulent flow simulation , 2013 .