涡轮增压器进气口消声器设计与性能评估  

Design and Performance Evaluation of Muffler at Turbocharger Inlet

作　　者：李恒[1] 郝志勇[1] 

机构地区：[1]浙江大学能源工程学系,杭州310027

出　　处：《汽车工程》2015年第4期435-439,共5页Automotive Engineering

基　　金："十二五"国家科技支撑计划重点项目(2011BAE22B05)资助

摘　　要：道路试验测得了某小型汽油车进气管口、车内驾驶员右耳处声压频谱，确定其2．6～3．0kHz频段噪声源为增压器。结合有限元法设计了压气机进气口消声器，并计算了其无流条件下的传递损失，用两负载法实验加以验证，两者结果相吻合；1．8～3．3kHz频率范围内，传递损失平均达25dB以上。最后对比了安装消声器前后进气管口和车内噪声的声压频谱，结果表明：消声器在目标频段具有理想的消声性能，有效降低了因增压器噪声引起的车内异响。The sound pressure spectra of intake noise and interior noise at driver＇ s right ear of a compact gasoline vehicle are measured in a road test with the source of noise at the frequency range of 2.6 - 3.0kHz located at turbocharger. The muffler at compressor inlet is designed with its transmission loss without flow evaluated by finite element analysis and verified by experiments based on two-load method, with both results agree well with each oth- er. In the frequency range of 1.8 to 3.3kHz, the average transmission loss reaches over 25dB. Finally the sound pressure spectra of intake noise and vehicle interior noise with and without muffler are compared and the results indicate that the muffler designed has ideal noise attenuation performance in objective frequency range and can effectively reduce abnormal vehicle interior noise caused by turbocharger.

关 键 词：涡轮增压器 消声器 有限元法 两负载法 传递损失 

分 类 号：U464.13[机械工程—车辆工程]