基于计算流体动力学的内燃机进气空滤器消声量的计算

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (7) : 141-145.

论文

基于计算流体动力学的内燃机进气空滤器消声量的计算

刘联鋆，郝志勇，郑旭

作者信息 +

Calculation of Noise Reduction of Internal-Combustion Engine Air-Cleaner Based On CFD

LIU Lian-yun，HAO Zhi-yong，ZHENG Xu

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文章历史 +

摘要

分析管道末端声反射特性，用等效延长管模拟进气口声学边界，基于计算流体动力学计算了无流条件下某内燃机空滤器的消声量。将计算值与实验测量值对比，验证模型和计算流体动力学方法的有效性。进一步计算了有平均流条件下空滤器的消声量，发现进气口马赫数为0.08时空滤器的消声量和无流条件下差别不大。最后用多孔区域模拟了滤芯，用CFD法计算了无流和有流时带滤芯空滤器的消声量，研究了CFD法中滤芯模拟的特点。

Abstract

A CFD approach was proposed to calculate the noise reduction of an air-cleaner for internal-combustion engine in the condition without mean flow. In the approach, a correction pipe was modeled to represent the real inlet boundary of the air-cleaner regarding the duct acoustic characteristics. The model and the approach were validated by comparing the calculated noise reduction with experimental data. Further, the noise reduction in the condition of mean flow was calculated. It was suggested that the mean flow with Mach number of 0.08 has no significant effect on noise reduction compared with that in the condition without mean flow. In addition the filter was modeled as porous zone, and the noise reduction of the cleaner with filter was calculated in the conditions with and without mean flow. The features of CFD model of the filter were investigated.

导出引用

刘联鋆;郝志勇;郑旭. 基于计算流体动力学的内燃机进气空滤器消声量的计算[J]. 振动与冲击, 2013, 32(7): 141-145

LIU Lian-yun;HAO Zhi-yong;ZHENG Xu. Calculation of Noise Reduction of Internal-Combustion Engine Air-Cleaner Based On CFD[J]. Journal of Vibration and Shock, 2013, 32(7): 141-145