旋转叶轮式内燃机内部流动初步分析

为对旋转叶轮式内燃机内部流动进行分析，在额定转速下，对旋转叶轮式内燃机的排气、进气以及压缩过程进行数值模拟，探究进气参数变化对燃烧室冷态流场的影响.对旋转叶轮式内燃机工作过程的分析发现：在进排气过程中，燃烧室内存在涡流，气体流动复杂，平均压强先减小后增大.在压缩过程中，燃烧室内平均压强逐渐升高，气体流动稳定.对于进气角度来说，进气角为0°时，利于进排气过程进行.进气温度和进气压力越大，燃烧室内气体运动越复杂.
In order to analyze the internal flow of the rotary impeller internal combustion engine, the exhaust, intake and compression process were numerically simulated at rated speed, and the impact of the intake parameters on the cold flow field was also studied. Through the analysis of the working process of the rotary impeller internal combustion engine, it has been found that there is the swirling flow in the combustion chamber in the process of intake and exhaust, gas movement is complicated, and the average pressure decreases first and then increases. In the compression process, the average pressure of the combustion chamber gradually increases, and the gas flow is stable. For the intake angle, when the intake angle is 0 °, it is advantageous to carry out the exhaust. The greater the intake temperature and pressure, the more complex the gas movement in the combustion chamber.