Research on Aerodynamic Noise Characteristics of High-speed Centrifugal Fans Based on Hybrid Computational Acoustics Method
This article is based on a hybrid method combining detached eddy simulation and acoustic finite element analysis to conduct theoretical analysis of aerodynamic noise of a certain type of high-speed centrifugal fan for ships application.The rationality of the theoretical analysis is verified experimental research.The research result has shown that the sound source in the rotating area of the impeller is the main source of aerodynamic noise,and the directional characteristics of aerodynamic noise at the blade frequency are the most obvious,contributing the most to the aerodynamic noise of centrifugal fans.The surface sound source in the rotating area of the impeller is the main source of discrete single tone noise,while the body sound source in the stationary area of the volute and pipeline mainly contributes the low-frequency and broadband noise.The numerical simulation of aerodynamic noise matches well with the experimental values,proving the accuracy of the theoretical method.This theoretical method provides an effective strategy for predicting aerodynamic noise of high-speed centrifugal fans,and can provide a basis for optimizing the low-noise design of centrifugal fan structures.
Centrifugal FanAerodynamic NoiseHybrid Computational AcousticsNumerical SimulationExperimental Research
万方数据
维普
