펌프젯 추진기 날개 끝 누설 와류 감소를 위한 수치해석 연구

Abstract

This study presents the results of a numerical analysis using the Reynolds-Averaged Navier-Stokes (RANS) method to investigate the potential mitigation of tip leakage vortex (TLV) in the KRISO pumpjet propulsor through rotor tip shape modifications. Three alternative tip geometries were designed by extending the rotor tip toward either the pressure side, the suction side, or both. The present comparative analysis revealed that the pressure-side extension (PSE) tip achieved the most significant reduction in TLV compared to the original design. A detailed flow analysis in the gap indicated that the PSE tip effectively reduced both the pressure drop and velocity magnitude within the gap. However, the effect of the PSE tip on the overall efficiency of the pumpjet propulsor was found to be negligible.