Numerical Simulation of Aerodynamic Noise in Vehicle Occupant Compartment in Wind-Rain Field
This study takes a car as the research object,and based on numerical simulation,discusses the sound pressure level of aerodynamic noise in the passenger compartment of the car under different rainfall conditions.The Realizable k-ε/LES turbulence model is used to simulate the single-phase flow field in the absence of rain,and discrete DPM is used to simulate the two-phase flow field in the presence of rain.The average input excitation of 1/3 octave of each subsystem on the body surface under different rainfall is obtained by using the FW-H method,and the sound pressure level of aerodynamic noise near the driver's ear is obtained by using the hybrid FE-SEA method.The simulation results show that in the 20-1000Hz frequency band,the sound pressure level at the driver's ear under the rainy condition is lower than that under the rainless condition at all central frequencies,the overall sound pressure level at the driver's ear under the light rain condition and the moderate rain condition is relatively close,and the overall sound pressure level at the driver's ear under the heavy rain condition is the lowest.
gas-liquid two-phase flowaerodynamic noise of passenger compartmentRealizable k-ε/LESDPMFE-SEAnumerical simulation
NETL
NSTL
万方数据
维普
