Numerical Simulation Study on Noise of Integrated Water Tank in Automobiles
Aiming at the mechanism of water flow rolling noise in the integrated water tank under normal working conditions,the acoustic Lighthill analogy theory and Computational fluid dynamics(CFD)flow field coupling were used to conduct numerical simulation research on the motor side of the water tank.This article u-ses SST(Menter)K-Omega to perform steady flow analysis on the internal structure of the water tank before and after optimization,as well as unsteady solution using a separated vortex model.The internal pressure and velocity cloud map of the water tank and the impeller pulsation pressure cloud map are output,and then used as input for acoustic finite element and infinite element numerical calculations for direct frequency response analysis.Different modes of water flow noise are compared to analyze the changes in the internal sound pressure level of the water tank.The results show that the rolling sound of the coolant is mainly concentrated in the range of 50-500 Hz,transmitted through the box,and a significant eddy current phenomenon is formed at the internal water tank baffle.The sound pressure level distribution is relatively large,and the overall noise characteristic curve be-longs to the broadband noise.Optimize the channel plate model to reduce water tank noise by 3.65dB and reduce eddy current intensity.The research results provide a lot of theoretical basis for the design and performance im-provement of automotive water tanks.
Integrated water tankLighthill sound analogyFinite elementsUnlimited yuanFlow noise
万方数据
维普
