机械科学与技术2017，Vol.36Issue(5)：665-669,5.DOI:10.13433/j.cnki.1003-8728.2017.0502
共振式消声器声学性能三维时域计算及分析
Acoustic Performance Analysis of Resonant Muffler based on Three-dimensional Time-domain Computation
摘要
Abstract
The resonant muffler is an important measure to improve the intake and exhaust noise.The interaction between the flow and the sound is significant.The acoustic performance of resonant muffler was calculated with the three-dimensional time domain impulse method,which is based on the computational fluid dynamics (CFD) simulation.The CFD simulation results were verified by experimental results.The acoustic performances varying with different flow rates and temperature were analyzed.The results show that the peak at the resonance frequency declines and the transmission loss at the pass frequency moves gradually close to the resonance peak along with the increasing flow rate.Besides,the frequency characteristics shift to the higher frequency and the overall noise reduction effect declines.The resonance frequency shifts to the higher frequency,and the peak decreases with the temperature increase.Both the flow and temperature has more obvious effect on low frequency transmission loss than high frequency.关键词
计算流体力学/消声器/传递损失/流速/温度Key words
computational fluid dynamics/muffler/transmission loss/flow velocity/temperature分类
通用工业技术引用本文复制引用
田赛龙,毕凤荣,景亚兵,姚昱儒,杨晓,刘建飞..共振式消声器声学性能三维时域计算及分析[J].机械科学与技术,2017,36(5):665-669,5.基金项目
国家科技支撑计划项目(2015BAF07B04)资助 （2015BAF07B04）
