Cavitation tests of hydraulic model were carried out in vacuum tank. A classical theory for cavitation tests in vacuum tank has been used. According to two principles, the test procedure in vacuum tank and the predict...Cavitation tests of hydraulic model were carried out in vacuum tank. A classical theory for cavitation tests in vacuum tank has been used. According to two principles, the test procedure in vacuum tank and the prediction of cavitation features on prototype were obtained. However, by using these test results it can not make a reliable prediction of cavitation feature on prototype. It shows what should be the considerable reasons for the difficulties in comparison between the results of cavitation tests in vacuum tank and how to improve the cavitation tests under a condition of vacuum pressure.展开更多
This paper is mainly devoted to conduct a series of vibratory cavitation erosion tests using the magnetostriction apparatus. Distilled water was used as a standard liquid medium for comparison and other liquids were g...This paper is mainly devoted to conduct a series of vibratory cavitation erosion tests using the magnetostriction apparatus. Distilled water was used as a standard liquid medium for comparison and other liquids were glycerine, kerosene, silicone oil and water containing different concentration glycerine and solid particles, bakerite and fly ash. Experimental results indicate that viscosity of liquid restrains, attenuates and alleviats cavitation erosion. Experiments witness that there exists critical concentration and equivalent concentration. The behaviour of cavitation clouds and the appearance of the pitting were observed. It is helpful to explain the effect of liquid quality on cavitation erosion.展开更多
文摘Cavitation tests of hydraulic model were carried out in vacuum tank. A classical theory for cavitation tests in vacuum tank has been used. According to two principles, the test procedure in vacuum tank and the prediction of cavitation features on prototype were obtained. However, by using these test results it can not make a reliable prediction of cavitation feature on prototype. It shows what should be the considerable reasons for the difficulties in comparison between the results of cavitation tests in vacuum tank and how to improve the cavitation tests under a condition of vacuum pressure.
文摘This paper is mainly devoted to conduct a series of vibratory cavitation erosion tests using the magnetostriction apparatus. Distilled water was used as a standard liquid medium for comparison and other liquids were glycerine, kerosene, silicone oil and water containing different concentration glycerine and solid particles, bakerite and fly ash. Experimental results indicate that viscosity of liquid restrains, attenuates and alleviats cavitation erosion. Experiments witness that there exists critical concentration and equivalent concentration. The behaviour of cavitation clouds and the appearance of the pitting were observed. It is helpful to explain the effect of liquid quality on cavitation erosion.
