汽车工程
汽車工程
기차공정
AUTOMOTIVE ENGINEERING
2015年
3期
336-340
,共5页
消声器%CFD法%多孔材料%消声性能
消聲器%CFD法%多孔材料%消聲性能
소성기%CFD법%다공재료%소성성능
silencer%CFD technique%porous material%noise attenuation performance
应用计算流体动力学( CFD)方法，计算无流条件下涡轮增压器出口阻抗复合型消声器的传递损失，与实验结果进行对比，验证了CFD模型的可靠性，进而计算有流条件下阻抗复合型消声器的消声性能。结果表明，添加多孔材料后，部分频段消声性能略有提高，特定频段消声性能变差。最后对消声器结构进行改进，并采用CFD法重新评估了改进后消声器的消声性能。
應用計算流體動力學( CFD)方法，計算無流條件下渦輪增壓器齣口阻抗複閤型消聲器的傳遞損失，與實驗結果進行對比，驗證瞭CFD模型的可靠性，進而計算有流條件下阻抗複閤型消聲器的消聲性能。結果錶明，添加多孔材料後，部分頻段消聲性能略有提高，特定頻段消聲性能變差。最後對消聲器結構進行改進，併採用CFD法重新評估瞭改進後消聲器的消聲性能。
응용계산류체동역학( CFD)방법，계산무류조건하와륜증압기출구조항복합형소성기적전체손실，여실험결과진행대비，험증료CFD모형적가고성，진이계산유류조건하조항복합형소성기적소성성능。결과표명，첨가다공재료후，부분빈단소성성능략유제고，특정빈단소성성능변차。최후대소성기결구진행개진，병채용CFD법중신평고료개진후소성기적소성성능。
By applying computational fluid dynamics ( CFD) technique, the transmission loss ( TL) of im-pedance compound silencer at turbocharger outlet under non-flow condition is calculated and compared with experi-ment results, verifying the reliability of CFD model, and then the noise attenuation performance of impedance com-pound silencer under mean flow condition is calculated. The results show that after the silencer is covered by porous stuff, its noise attenuation performance slightly enhances in some frequency range but becomes poor in specific fre-quency range. Finally the structure of silencer is modified with its noise attenuation performance reevaluated with CFD technique.
