In order to solve the problem of flow separation along single arc blade surface and the wrapping angle can not be changed which increase the hydraulic loss,this paper presented a method to form contour of cylindrical blade by employing variable angle spiral and logarithmic spiral,and the three dimensional model of the impeller was established with Pro/E. Finally,tile FLUENT software was applied to simulating two types of the impeller. The simulation results show this contou...
