DefinePK

Abstract

Fluid gap cell is used for CFD analysis of compressor valve. The effect of the fluid gap cell on compressor performance prediction is still insufficient. Therefore, in this study, the performance change in the compressor was investigated by varying the fluid gap cell size from 100 µm to 10 µm. As the fluid gap cell size decreases, the maximum valve lift increases and the second valve opening lift becomes steeper. Also, the smaller the fluid gap cell size, the more accurately the valve flow rate is predicted when the valve is at closing. However, it has little effect on the PV diagram. In summary, the fluid gap cell size affects valve lift and valve suction flow rate changes but has little effect on CW, CC, and EER. Therefore, a 100um fluid gap cell can be used if you are only interested in overall compressor performance. Otherwise, it would be better to use a fluid gap cell of 25 µm or below.