The design method of the hyperbola profile in the impeller meridional plane of engine water pump

At present, the profile in the impeller axial plane of the engine water pump is designed by using the method of the projection on the axial plane, which needs repeat calculation and plentiful and complicated works. The profile in the impeller axial plane is designed by the design method of the hyperbola profile according to the principle of the angle flow which follows liquid flow law. This way provides a simple and available method for the engineers that embark on the impeller design. It can avoid the complication of conventional way and save large amount of manpower and funds. The model is built by CAD and analyzed by CFD. The result shows that the reversed flows and the secondary flows are evidently reduced. At the same time, the experiment verified that the head and efficiency of the pump are improved distinctly.