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Abstract:To study the effectiveness of hydrofoil surface water injection on cavitation suppression，theunsteady cavitation flow field around the NACA0066 hydrofoil at attack angle of 60 was simulated bythe modified RNG k一￡turbulence model combined with the full-cavitation model. The structure ofcavitation flow field and the hydrodynamic performance of hydrofoil were analyzed at the cavitationnumber of 0. 85，0. 70，0. 55，respectively. Results show that barriered by the jet，the momentum ofthe reentrant jet was reduced;therefore the development of cavitation and the strength of cavity shed-ding were weakened to some extent. Cavitation suppression effect was very obvious in the cavitationconditions with the cavitation number of 0. 7 and above when the injection position was at 37% chordlength from the hydrofoil leading edge and the jet-flow ratio kept 0. 3.Time-averaged lift and drag coef-ficient were reduced，but the lift-drab ratio increased in water injection conditions.
Abstract: To study the effectiveness of hydrofoil surface water injection on cavitation suppression, the unsteady cavitation flow field around the NACA0066 hydrofoil at attack angle of 60 was simulated by the modified RNG k-turbulence model combined with the full-cavitation model. The structure ofcavitation flow field and the hydrodynamic performance of hydrofoil were analyzed at the cavitation number of 0. 85,0. 70,0. 55, respectively. Results show that barriered by the jet, the momentum of the reentrant jet was reduced; therefore the development of cavitation and the strength of cavity shed-ding were weakened to some extent. Cavitation suppression effect was very obvious in the cavitation condition with the cavitation number of 0. 7 and above when the injection position was at 37% chordlength from the hydrofoil leading edge and the jet-flow ratio kept 0. 3.Time-averaged lift and drag coef-ficient were reduced, but the lift-drab ratio increased in water injection conditions.