Cavitation—its Inception and Damage Part II^*

This article deals with the effects of cavitation damage. The various theories on Cavitation Damage have been described. The relative resistance of materials to cavitation have been given in a number of tables. The experimental procedure followed in these studies at the laboratory have been described in great detail. Experiments were mainly done with cement, concrete, stone, wood and other materials of civil engineering construction. Generally, it has been established that cavitation damage is inversely proportional to the compressive strength of the material. The effect of duration of the test and initial surface roughness have been discussed. The effect of hydrodynamic factors like pressure coefficients, velocity, Reynolds Number have been discussed. A New Number called the Cavitation Damage Number has been proposed as a measure of cavitation damage likely to occur in a specimen. The conclusions obtained as a result of these experiments have been given out at the end of the article.