摘要
针对多翼离心风机气动噪声的主要噪声源提出降噪方案。首先,对于多翼离心风机涡流噪声的降噪,主要通过优化叶轮、蜗壳的结构几何参数和在叶轮出口加装旋转扩压器等方式进行。其次,对于多翼离心风机旋转噪声的降噪,主要通过改变蜗舌形式进行。最后对优化进出口安装角的叶轮和在叶轮出口加装旋转扩压器这两种降噪措施进行试验验证。结果表明,改进后的风机与原型相比达到显著的降噪效果。
In this paper,some schemes of reducing the aerodynamic noise are proposed for multi-blade centrifugal fans.Firstly,the vortex noise can be reduced mainly through the optimization of the geometric parameters of the impeller and volute and installing a rotation diffuser in the outlet of the impeller.Secondly,the discrete noise can be reduced mainly by changing the form of volute tongue.Finally,the experimental verification is carried out for the two improved fans,one is designed with optimization of inlet and outlet blade angles,and the other is installed a rotation diffuser in the outlet.The tests show that the noise of the improved fans is reduced obviously in comparison with the prototype.
出处
《噪声与振动控制》
CSCD
北大核心
2011年第3期166-170,共5页
Noise and Vibration Control
关键词
声学
多翼离心风机
气动噪声
降噪
实验研究
叶轮
acoustics
multi-blade centrifugal fan
aerodynamic noise
noise reduction
test research
impelle
作者简介
张胜利（1974-），男，博士，流体力学（空气动力学）专业。主要从事空气动力学、流体机械、飞行器设计、人机与环境、风工程与新能源等领域的研究与应用开发工作。E-mail：nwpudrc@sina．com
