Numerical Analysis on the Flow Field of the Bubble Pulsation under the Near Underwater Explosion

摘要

The attenuation of the bubble energy near underwater explosion compared with the shock wave was very slow. Though it was small, the influence of the peak value of the bubble pulsation on the structure was negligible. The consumed energy was full considered,adding the influence of fictitious force and bubble energy upon the whole bubble pulsation. According to the theory of one-dimensional incompressible flow and considering the isentropic process of detonation product, the fundamental equations on the law of the bubble pulsation underwater explosion and the pressure distributing in water was improved. The radius, period and velocity of the bubble pulsation and the pressure in water were calculated by using the Runge-Kutta numerical method.The calculating results were fit closely to that of experiments. So the equations for the description of the bubble pulsation characteristics were tallied well with the true complexion.