叶片厚度对旋涡风机叶片噪声的影响分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (8) : 130-133.

论文

叶片厚度对旋涡风机叶片噪声的影响分析

左曙光，胡清，韩惠君，康强

作者信息 +

Influence analysis of blade thickness on the regenerative blower’s blade noise

ZUO Shu-guang，HU Qing，HAN Hui-jun，KANG Qiang

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文章历史 +

摘要

利用三维CFD模型对旋涡风机内部流场进行模拟分析，获得叶片表面的压力脉动信息，以叶片表面压力流场作为气动声源，通过求解FW-H方程，计算了叶片产生的远场气动噪声；并以叶片表面的压力脉动信号作为激励源，计算了叶片振动产生的噪声。计算结果表明叶片厚度在1 mm到4 mm的范围，其气动噪声基本保持不变，结构噪声随叶片厚度减小而大幅增加，进一步分析得出叶片产生的噪声以气动噪声为主，结构噪声基本可以忽略。

Abstract

The regenerative blower’s inner flow field is simulated by using a three-dimensional model, and the dynamic pressure of every blade can be attained. Then by the FW-H function calculation and with blades’ dynamic pressure as sound resource, far field aerodynamic noise caused by blades is obtained. And with blade’s dynamic pressure as excitation source, vibration noise radiated by blades is calculated. The change rule of blade’s far field aerodynamic noise and vibration noise is calculated and analyzed when blade thickness varies from one millimeter to four millimeters. The result is that the blades’ noise is mainly aerodynamic noise and structural noise can be dismissed through analysis.

导出引用

左曙光;胡清;韩惠君;康强. 叶片厚度对旋涡风机叶片噪声的影响分析[J]. 振动与冲击, 2014, 33(8): 130-133

ZUO Shu-guang;HU Qing;HAN Hui-jun;KANG Qiang. Influence analysis of blade thickness on the regenerative blower’s blade noise[J]. Journal of Vibration and Shock, 2014, 33(8): 130-133