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Indexed by:期刊论文

Date of Publication:2017-01-01

Journal:Journal of Drainage and Irrigation Machinery Engineering

Included Journals:CSCD、Scopus

Volume:35

Issue:6

Page Number:461-466

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 6   was simulated by the modified RNG k-   turbulence model combined with the full-cavitation model. The structure of cavitation flow field and the hydrodynamic performance of hydrofoil were analyzed at the cavitation number of 0.85, 0.70, 0.55, respectively. The results show that barriered by the jet, the momentum of the reentrant jet was reduced; The development of cavitation and the strength of cavity shedding were weakened to some extent. Cavitation suppression effect was very obvious in the cavitation conditions with the cavitation number of 0.7 and above when the injection position was at 37% chord length from the hydrofoil leading edge and the jet-flow ratio kept 0.3. Time-averaged lift and drag coefficient were reduced, and the lift-drag ratio increased in water injection conditions. ? 2017, Editorial Department of Journal of Drainage and Irrigation Machinery Engineering. All right reserved.