叶尖间隙对风机噪声影响的试验研究

Experimental Investigations of Effects of Tip Clearance on Fan Noise

本文通过对轴流风机在不同叶尖间隙下进行的试验研究,探讨了叶尖间隙对风机噪声的影响,进而研究在叶片外缘加旋转环控制间隙涡流的效果,结果表明,相同间隙条件加环风机与不加环风机相比噪声降低,性能改善。

Investigations arc made through a scries of experimental studies of axial flow fans with different tip clearances into their effects on fan noises. Upon this basis,futher studies are conducted of the situation where the clearance vortex is influenced by a rotating shroud ring attached to the blade fringes. It is shown from the results that lower noise and improved performance can be achieved by attaching a rotating shroud ring to the fan