离心风机蜗壳壁面动态压力测试及分析

摘要

利用高频动态压力传感器对离心风机蜗壳壁面4个位置动态压力进行了测量，得出动态压力大小及频率组成沿风机轴向的变化规律。通过对测量结果的分析，得出蜗舌部位气流流动规律，不稳定流动发生位置及主要不稳定流动形式，为以后提高风机性能，降低噪声、减小振动情况提供试验依据。%Fluctuation of static pressure at 4 points on the volute wall of a centrifugal fan is measured with high-frequency pressure transducers. Through the analysis of the test results, the amplitude and frequency of the pressure fluctuations along the volute axial are obtained, and the air flow field near the volute tongue, position and the main form of instable flow are derived. The results can be used as a reference for improvement of noise and vibration situation of centrifugal fans.