油中翼列における気体性キャビテーションモデルの検証

抄録

The cavitation that occurs in fluid machinery using hydraulic oil is of a different form than the cavitation that occurs in water. The cavitation in hydraulic oil is dominated by gaseous cavitation caused by the separation of dissolved air. However, the cause of separation of dissolved air and the threshold values in flow field are still completely unclear. The author's research group developed a numerical model that defines the threshold value for determining the occurrence of gaseous cavitation in terms of “dynamic air separation pressure” which changes according to the unsteady flow field co cavitation. The practicality of this approach was verified in the cavitating flow field around cascade hydrofoil in hydraulic oil, which shape is for a torque converter. The gaseous cavitation model is added to commercial software Simcenter STAR-CCM+. The validity of the gaseous cavitation model is verified by comparing the numerical results with the experimental results.