Analysis and Optimization of Automotive HVAC Duct Noise Characteristics
With the development of new energy vehicles,the problem of automobile HVAC(Heating Ven-tilation and Air Conditioning)noise in automobiles is becoming increasingly prominent.In order to investigate the sources of HVAC duct noise and the factors influencing the distribution characteristics of the sound field,numerical simulation methods were used to analyze the internal flow field and external sound field of the HVAC duct.The distribution characteristics of different noise sources in the HVAC duct and the contribution to the to-tal noise were discussed.On this basis,the original HVAC duct was structurally optimized,and the flow distri-bution and external noise level before and after optimization were compared.The results show that the reasona-ble improvement of duct transition curvature and structural projection is beneficial to enhance the uniformity of flow distribution of each duct and reduce the duct noise level.The results of this study can provide a certain ref-erence and guidance for the design optimization of HVAC ducts.
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