2023 Volume 40 Issue 4 Pages 253-
It is considered that the supercharging effect occurs at the second cylinder of the two-stage compressor as well as in the single stage compressor. However, the conditions for causing supercharging effect are not clear, nor is the characteristic of intermediate pressure variation itself. Therefore, in this study, a one-dimensional simulation model for the two-stage compressor was developed. Numerical simulations regarding the rotational phase difference between two cylinders and the resonance of the standing wave in the connection pipe were conducted. Simulation results showed that the average suction pressure changes periodically with respect to the phase difference due to the supercharging effect. And if the standing wave in the connection pipe is in resonance, the supercharging effect will be enhanced. However, even if the standing wave is in resonance, the supercharging effect will not occur unless the phase difference is not appropriate.
