The Mechanism of Steam-Bubble Growth during Hydrodynamic Cavitation

A large number of studies have been devoted to investigating the dynamics of cavitation steam-gas bubbles. The energy losses on radiation were disregarded. The processes of the two-phase flow in the plane channel and the bubble dynamics with hydrodynamic cavitation are considered. The highest values of temperature during bubble compression amounted to about 1100 K. The thermal properties of water and steam were set in the tabulated form from the data and determined by the two parametrical square-law interpolation as a function of pressure and temperature. On the basis of the results obtained, it is possible to draw the conclusion that the mechanism of the steam bubble growth has a group character. The first bubble of subcritical size is collapsed by the external pressure. In this case, the local temperature increases to values substantially exceeding the fluid temperature. Other bubbles of the same size arising in this zone can become supercritical and start to grow.