LNG 플랜트용 프로판 냉매 원심압축기의 공력설계 및 전산해석적 연구

In this study, flow structure in a four-stage centrifugal compressor for LNG Plant with the refrigerant, Propane, was numerically investigated at the design point of the compressor using a commercial code. The impeller has Tip Clearance. Flow characteristics in the passages of impeller and vaneless diffuser were analyzed in detail including Mach number, pressure contours and static entropy in blade spanwise and meridional plane for 4th-stage. The estimation on the one-dimensional output from the preliminary design and three-dimensional shape of the impeller blade was performed through the flow analysis. The verification for designed compressor was carried out from three-dimensional Navier-Stokes analysis. The results will be used as reference data for a new design of 3-D impeller shape to improve propane refrigerant compressor performance.