倾斜锯齿尾缘轴流风机降噪的实验研究  

Experimental Study on Noise Reduction of an Axial Flow Fan with Inclined Serrated Trailing Edge

作　　者：黄琪琪 陈二云[1] 杨爱玲[1] 刘家成 HUANG Qiqi;CHEN Eryun;YANG Ailing;LIU Jiacheng(Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,动力工程多相流动与传热重点实验室,上海200093

出　　处：《动力工程学报》2020年第9期735-741,共7页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51106099,50976072);上海市科委科研基金资助项目(13DZ2260900)。

摘　　要：针对仿生锯齿尾缘的降噪特性,将其应用到以NACA65-010叶型为原型通过加弯技术设计出的小型轴流风机上,通过风洞实验对比分析原型风机、传统锯齿尾缘风机与倾斜锯齿尾缘风机的气动特性,并在半消声室里通过Brüel&Kj?r手持式声强分析仪测量3种尾缘结构的风机噪声特性,研究倾斜角对风机尾缘噪声的影响。结果表明:在1 800 r/min转速下,倾斜锯齿尾缘风机在全流量范围内可使风机噪声下降1.15~2.38 dB,比传统锯齿尾缘风机降噪效果好,其中倾斜角φ=30°时降噪效果最佳,风机的比A声级下降1.87 dB;锯齿尾缘风机全压均有所下降,最高降低了8.3%。The noise reduction structure of bionic serrated trailing edge was applied to a small axial flow fan designed on the basis of NACA65-010 blade through bending technology. The prototype fan, the traditional serrated trailing edge fan and the inclined serrated trailing edge fan were compared and analyzed through wind tunnel experiment. In the semi-anechoic chamber, the noise characteristics of above three kinds of trailing edges were measured by Brüel&Kj?r hand-held sound intensity analyzer, so as to study the influence of the inclined angle on the trailing edge noise of the fan. Results show that at the rotation speed of 1 800 r/min, the inclined serrated trailing edge helps the fan to have a lower noise by 1.15~2.38 dB in the full flow range, with better noise reduction effectiveness than the traditional serrated trailing edge fan, and the optimal noise reduction effectiveness appears at the inclined angle of φ=30°, while the specific A-weighted sound level could be reduced by 1.87 dB. However, the total pressure of the fan with serrated trailing edge reduces, with a maximum drop by 8.3% under design conditions.

关 键 词：锯齿尾缘 倾斜锯齿 轴流风机 气动噪声 

分 类 号：TK05[动力工程及工程热物理]