The change of sound velocity with pressure, dryness degree, void-fraction, and phase-transition coefficient are analyzed. Some important conclusions are derived.
分析了两相流体中音速随压力、干度、汽隙率、相变系数等的变化关系，并从中得出了一些重要的结论。
2
The relation of bubble nucleation rate and degree of superheat, and phasechange driving force and phenomenological coefficient, were analyzed based on phenomenological theory, respectively.
基于唯象理论，分析了汽泡核化速率和过热度以及相变驱动力和唯象系数的关系。
3
When the battery surface temperature is in the phasechange temperature range, the cooling effect is not obvious by continuing increasing material thickness and convective heat transfer coefficient.