With a wide application of multiphase flow pumps, it is obvious that the flow-induced noise in the transportation of gas–liquid two-phase media is turning more and more into the focus. To study the influence of different inlet gas volume fractions (IGVFs) on the flow-induced noise in a pump, this study focused on the internal flow characteristics and the noise radiation characteristics of acoustic vibration coupling under gas–liquid two-phase flows. The results showed that the introduction of gas does not affect the main frequencies in the pump. The radiated noise mainly stems from the inner-wall pressure fluctuation of the pump. However, with the increase of IGVF, the liquid phase is squeezed by the gas phase, the flow stability in the pump becomes worse and causing the pump performance degradation. The flow induced noise in the pump increases correspondingly. The research results are of great significance to noise reduction studies and the design of quieter centrifugal pumps.

随着多相流泵的广泛应用，很明显，气液两相介质输送中的流致噪声越来越成为人们关注的焦点。为了研究不同入口气体体积分数（IGVFs）对泵中流动引起的噪声的影响，本研究着眼于气液两相流下的内部流动特性和声振动耦合的噪声辐射特性。结果表明，气体的引入不会影响泵的主频率。辐射噪声主要源于泵的内壁压力波动。然而，随着IGVF的增加，液相被气相压缩，泵中的流动稳定性变差并且导致泵性能下降。泵中流动引起的噪声相应增加。研究结果对降噪研究和安静的离心泵设计具有重要意义。