Reasearch on the probability of cavitationary erosion on high spillway, applied in Xekaman 1 hydropower

Abstract

    On high spillway with large amount of discharge, cavitation can ruin the surface, which will lead to further structural damage. This paper gives an overview on the possibility of cavitation and cavitationary erosion on high spillway's surface. The results are used as references to select material, then adapted for detailed calculation to check the likelihood of cavitationary erosion and choose the proper preventive method. Calculation on Xekaman I hydropower showed that its spillway could be cavitated while flood was discharged, thus the method of supplying air on surface was chosen to prevent cavitationary erosion. Calculation was conducted to find the ideal location and size of the aerator.