Experiment Research on Cavitation Control by Active Injection
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Based on the active control strategy of the flow, this paper proposed a method of suppressing cavitation by arranging water jet holes on the suction surface of the hydrofoil. The idea of cavitation control was tested in the experiments. The NACA0066 hydrofoil was placed in the test channel at the attack angle of 8°. The cavitation conditions were distinguished by cavitation number and the mass flow coefficient of the jet flow. High-speed flow field display technology was used to study the characteristic of cavitation. The influence of the jet flow mass flow on cavitation suppression was examined. The results show that the jet can suppress or weaken cavitation. With the decreasing of the cavitation number, the effect of the cavitation suppression was weakened, the mass flow of the jet needed for cavitation suppressing is increased. And the optimum mass flow coefficient of the jet flow was get under different cavitation number.