气体增压器充气过程动态仿真研究

Research on the Dynamic Characteristics During Boosting Charge of Gas Booster

针对气体增压器向气瓶的增压充气过程,考虑进出口压力变化、活塞摩擦及腔室换热等因素,利用热力学第一定律、气体状态方程、传热方程、气体质量流量方程及牛顿第二定律等建立了气体增压器的一阶常微分方程组,利用MATLAB软件进行数值仿真,得到充气过程中活塞运动曲线、各个腔室压力和温度变化曲线、进排气流量曲线,对比仿真和实验曲线,二者很好吻合。

The charging process from low-pressure gas bottle to high-pressure one was studied, considered the effect of some facts, including the changing of inlet and outlet pressure, clearance space, friction, according to the principle of kinematics, gas dynamics and thermodynamics, the mathematical and dynamics model of a gas booster system were established, which includes pressure differential equation of each chamber, flow rate equation, as well as the temperature equation and piston acceleration equation. The system was simulated with M-File of MATLAB software, and the pressure change curves, flow characteristic curve and time of charging gas were got, and the experimental data proved the correctness of simulation result.