Fig. 14 shows the distribution of the accumulated tip leakage flow from the leading to trailing edge of the impeller blade. It confirms that most of the tip leakage flow occurs between 20%
and 80% of the blade tip. Fig. 15 shows the total pressure contours and surface streamlines on the pressure side of the impeller blade. Due to the turning of the flow from the axial to radial direction, a pressure gradient develops from hub to shroud.This pressure gradient in the spanwise direction gradually comes down and becomes uniform at the exit of impeller blade.