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空泡溃灭时会产生很大的瞬时压强,造成流体机械装置的空蚀破坏并产生噪声和剧烈振动。为研究双空泡溃灭及溃灭时声辐射的规律,忽略流体的压缩性,建立了双空泡的运动方程。在L igh th ill方程基础上建立了双空泡溃灭时流体中的声辐射模型,并进行了数值计算。计算结果表明:随着空泡间距的减小,空泡溃灭的最小半径减小,溃灭时间延长,空泡辐射声压增大,说明空泡间的相互作用使空泡的溃灭过程变缓并使空泡辐射的噪声增强。
When the bubble collapses, a large instantaneous pressure is generated, causing cavitation damage to the fluid machinery and generating noise and severe vibration. In order to study the law of sound radiation when the double vacuoles collapse and collapse, neglecting the fluid compressibility, the equations of motion of the double cavities are established. Based on the Lighth ill equation, the acoustic radiation model in double bubble collapse was established and numerically calculated. The calculation results show that the minimum radius of bubble collapse decreases, the collapse time prolongs and the sound pressure of bubble increases, which means that the interaction between cavities causes the bubble collapse process Slows down and increases the noise of the bubble radiation.