针对多翼离心风机气动噪声的主要噪声源提出降噪方案。
In this paper, some schemes of reducing the aerodynamic noise are proposed for multi-blade centrifugal fans.
结合现有的经验理论，通过原型实验及CFD模拟，对多翼离心风机特性进行了研究。
Based on the recent theory, the performances of multi-blade centrifugal fan are studied by prototype experiment and CFD simulation.
本文采用CFD方法，详细分析了空调用多翼离心风机叶道中的气流分布以及进气口偏心的影响。
The vortices flow in the blade passages and the influence of the eccentric inlet of the multi-blade centrifugal fan for air-conditioner have been analyzed numerically by using commercial CFD code.
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。
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.
采用主成分分析方法，提出了一种空调器多翼离心通风机性能的综合评定方法。
The method of main element analysis is used. A comprehensive evaluation method of performance for multi-blade centrifugal fan in air conditioner is given.
采用主成分分析方法，提出了一种空调器多翼离心通风机性能的综合评定方法。
The method of main element analysis is used. A comprehensive evaluation method of performance for multi-blade centrifugal fan in air conditioner is given.
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