CAJ | 학술논문

基于Sysnoise和Fluent软件对管路消声元件的性能进行三维数值模拟。提出一种阻抗结合的管路消声器结构，给出了气相和气液两相条件下的管路消声器性能计算方法，预测了消声器的传递损失和流阻损失特性，通过实验测试验证了模拟分析的结果。结果显示在低频范围的数值模拟结果与实验结果能较好地吻合，均匀混入的液体使排气消声器降噪的频率往高频移动，中高频降噪效果明显变差；滞留在壁面的液体使消声器低频降噪效果明显提升。
기우Sysnoise화Fluent연건대관로소성원건적성능진행삼유수치모의。제출일충조항결합적관로소성기결구，급출료기상화기액량상조건하적관로소성기성능계산방법，예측료소성기적전체손실화류조손실특성，통과실험측시험증료모의분석적결과。결과현시재저빈범위적수치모의결과여실험결과능교호지문합，균균혼입적액체사배기소성기강조적빈솔왕고빈이동，중고빈강조효과명현변차；체류재벽면적액체사소성기저빈강조효과명현제승。
Numerical simulations were performed based on Sysnoise and Fluent software for the performance of a muffler in an exhaust pipe.A silencer structure with impedances combined was proposed,and a calculation method for performance of a muffler under the conditions of gas flow and two-phase flow of gas and liquid was presented to predict the transmission loss and flow resistance loss features of a muffler.The simulation analysis results were validated with test data.It was shown that the numerical simulation results agree well with test data in a lower frequency range;uniform mixure of gas and liquid makes the noise reduction frequency of the exhaust muffler higher,thus the performance of the muffler becomes worse in medium-lower frequency range;liquid help up on the inner wall surfance of the muffler makes its denoising effect increase obviously in a lower frenquency range.