Leakage Flow Influence on SHF pump model performances

摘要: This paper deals with the influence of leakage flow existing in SHF pump model on analysis internal behaviour inside vane diffuser performance using both experiments and calculations. PIV measurements have been performed at different hub to shroud planes one channel passage for a given speed rotation various rates. For each operating condition, trigged angular impeller positions. The performances static pressure rise were also measured three-hole probe. numerical simulations carried out Star CCM+ 9.06 code (RANS frozen unsteady calculations). Some results already presented XXth IAHR Symposium three flowrates RANS URANS In present paper, comparisons between calculations without leakages experimental are discussed these obtained by compared those three-holes probe measurements. show fluid global real improvement concerning efficiency diffuser, velocity distributions. These that is an important parameter has be taken into account order make improved approaches such specific set up.