Abstract

The results of a numerical study of the thermal and acoustic energies released during the collapse of a single spherical cavitation bubble in water at a pressure of 10 bar and a temperature of 20°С are given. In the model used, we take into account the thermal conductivity of the vapor in the bubble and the surrounding liquid, heat transfer, evaporation/condensation on the surface of the bubble, and the fluid compressibility. The conversion of mechanical energy into heat due to the fluid viscosity is not accounted for. When the bubble collapses, the energy of acoustic radiation due to radial pulsations of the bubble is shown to be approximately nine times greater than the energy spent on heating the liquid. The value of this energy is proportional to the cube of the initial bubble radius.

中文翻译：

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空泡破裂过程中的热能和声能评估

摘要

给出了在10 bar的压力和20°C的温度下单个球形空化气泡在水中坍塌过程中释放的热能和声能的数值研究结果。在所使用的模型中，我们考虑了气泡和周围液体中蒸汽的热导率，传热，气泡表面上的蒸发/冷凝以及流体的可压缩性。没有考虑由于流体粘度导致的机械能到热能的转化。当气泡破裂时，由于气泡的径向脉动而产生的声辐射能量显示为大约比加热液体所花费的能量大九倍。该能量的值与初始气泡半径的立方成正比。