依据非平衡热动力学相变理论建立了在均匀过热液中的汽泡生长模型．该模型中引入多变热，以保证汽泡在正化学势差作用下长大．采用数值计算方法，对汽泡生长的初始阶段特性进行了研究．计算表明，汽泡在此生长阶段存在滞后和自适应调节现象，滞后时间与引入的不同温度、压力、速度等扰动量的强度有关．在一定范围内，扰动大小并不明显影响汽泡生长曲线 Based on the theory of non-equilibrium thermodynamic phase transition, the bubble growth model in uniform superheated solution was established. The model introduces more heat, to ensure that the bubble in the positive chemical potential difference grow up. Numerical calculation method was used to study the initial stage of bubble growth. Calculations show that the bubble has a hysteresis and self-adaptive regulation in this growth stage, and the lag time is related to the intensity of disturbance such as different temperature, pressure and velocity introduced. Within a certain range, the disturbance size does not significantly affect the bubble growth curve