噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2014年
3期
195-197
,共3页
苏胜利%汪利%卢兆刚%鲁民月
囌勝利%汪利%盧兆剛%魯民月
소성리%왕리%로조강%로민월
声学%抗性消声器%传递损失%压力损失%CFD%数值模拟
聲學%抗性消聲器%傳遞損失%壓力損失%CFD%數值模擬
성학%항성소성기%전체손실%압력손실%CFD%수치모의
acoustics%reactive silencer%transmission loss%pressure loss%CFD%numerical simulation
使用二维轴对称时域CFD法计算双级膨胀腔消声器在无流和有流条件下的声衰减性能,并与实测结果进行比较。由于时域方法在计算中可以考虑复杂气流流动和介质粘性的影响,因而可以比较准确地预测双级膨胀腔消声器的传递损失。基于定常流动模型,使用Fluent软件预测双级膨胀腔消声器的压力损失,CFD计算结果与实验测量结果吻合良好。
使用二維軸對稱時域CFD法計算雙級膨脹腔消聲器在無流和有流條件下的聲衰減性能,併與實測結果進行比較。由于時域方法在計算中可以攷慮複雜氣流流動和介質粘性的影響,因而可以比較準確地預測雙級膨脹腔消聲器的傳遞損失。基于定常流動模型,使用Fluent軟件預測雙級膨脹腔消聲器的壓力損失,CFD計算結果與實驗測量結果吻閤良好。
사용이유축대칭시역CFD법계산쌍급팽창강소성기재무류화유류조건하적성쇠감성능,병여실측결과진행비교。유우시역방법재계산중가이고필복잡기류류동화개질점성적영향,인이가이비교준학지예측쌍급팽창강소성기적전체손실。기우정상류동모형,사용Fluent연건예측쌍급팽창강소성기적압력손실,CFD계산결과여실험측량결과문합량호。
The axisymmetric time-domain CFD method is employed to calculate the acoustic attenuation performance of a double expansion chamber silencer without and with air flow. The prediction results are compared with the experimental measurement data. Since the influences of complex gas flow and viscosity on the sound propagation and attenuation inside the silencer are included in the time-domain CFD simulation, the time-domain CFD method can accurately predict the transmission loss of the double expansion chamber silencer. Finally, the pressure drops of the double expansion chamber silencer are calculated by means of Fluent code based on the steady flow model. The CFD predictions are found to agree well with the experimental results.