摘要
为降低空压机的高压排气放空气流噪声,给出了节流降压板、片式消声通道及小孔喷注层的消声性能经验公式计算方法,设计了一款适用于排气放空气流的复合消声器。在Virtual. Lab中建立了复合消声器的声学有限元模型,开展了消声器的传递损失性能分析。仿真结果表明:声学有限元仿真与经验公式计算的传递损失结果较为接近;所设计的高压排气放空复合消声器在20 Hz^3 000 Hz宽频段内具有理想的消声效果,平均消声量可达57 dB。
To reduce the high-pressure jet-exhaust gas flow noise of air compressors,the empirical formula methods for analyzing the sound elimination performances of the throttle injection and the dissipative silencers with absorbent plates and small apertures spray are given.A composite muffler for jet-exhaust gas flow is designed.Its acoustic finite element model is built in the Virtural.Lab to simulate the transmission loss performance of the muffler.The simulation result indicates that the empirical formula calculation results are close to the simulation results.A desirable broadband acoustic attenuation in a wide range of 20 Hz-3 000 Hz can be obtained.The average amount of noise elimination of the jet-exhaust composite muffler is 57 dB.
作者
温华兵
李晓亮
吴晓佳
WEN Huabing;LI Xiaoliang;WU Xiaojia(School of Energy and Power,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu China)
出处
《噪声与振动控制》
CSCD
2018年第5期230-233,共4页
Noise and Vibration Control
基金
船用低速机工程研制项目资助(CDGC01-KT0607)
关键词
声学
消声器
声学性能
传递损失
传递导纳法
气流噪声
acoustics
muffler
acoustic performance
transmission loss
transfer relation admittance method
gas flow noise
