管道中的脉动过程可以用个别导数的线性微分方程来表示*。为了顺利计算脉动气流对活塞式压缩机工作循环的影响,必须在解微分方程同时解求边界条件,边界条件之一假设在活塞和阀工作管道的初始截面处。 与气体性能、泄漏、压缩与膨胀交变多变指数有关的气缸中实际气体质量的变化可以充分地用下述方程表示 The pulsation process in a pipe can be expressed as a linear differential equation with individual derivatives *. In order to smoothly calculate the effect of pulsating airflow on the working cycle of the piston compressor, the boundary conditions must be solved simultaneously while solving the differential equation. One of the boundary conditions is assumed to be at the initial section of the working pipe for the piston and valve. Changes in actual gas mass in a cylinder related to gas performance, leakage, compression and expansion alternating variable index can be fully expressed by the following equation