Three dimensional Flow Field Analysis of Erect Swirl in Strip shaped and Restricted orifice Surge Chamber
In a number of hydraulic model tests of the strip shaped and restricted orifice tailrace surge chamber,penetrating erect swirl all came forth without exception.With the method of three dimensional computational fluid dynamics,the VOF model of two phase flow is set up and the cause of erect swirl is analyzed in this article.The result shows that the area of restricted orifice,the bodily form of surge chamber and the length of tail race tunnel all have an obvious impact on the erect swirl.