Numerical Analysis and Optimization of Aerodynamic Noise of Automotive Air Conditioning Duct
Taking the automobile air-conditioning duct as the research object,the RNG model and LES model are used in Flu-ent to calculate the steady-state and transient state of the duct,the air volume at the outlet of the duct is tested and verified,and the acoustic analogy method is used to calculate the noise at the outlet of the duct.According to the results of the simulation analy-sis,the structure of air-conditioning duct is optimized by response surface method which took the corner radius of the air outlet 1 pipeline,the movement distance of the left and right pipe walls of the air outlet 2 pipeline as design variables,and considered the air volume ratio of the outlet 2 as the optimized purpose.the prototype and improvement duct are compared and analyzed.The re-sults show that compared with the original model,the air volume ratio of the optimized pipeline at outlet 2 has been increased from20.75%to25.25%,and the maximum noise reduction at the outlet is5.15dB.
Air Conditioning DuctAerodynamic NoiseComputational Fluid DynamicsResponse Surface Method
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