Method for designing centrifugal pump and mixed flow pump having specific speed of 150-1200

A method of generating a three-dimensional (3D) image of an impeller for a turbo pump, the method comprising the steps of:

• determining design specifications of the turbo pump, the design specifications including a flow rate, a head, and a number of revolutions;
• determining a specific speed of the impeller, wherein the specific speed is a dimensionless number representing a type of the turbo pump with a relational formula of the flow rate, the head, and the number of revolutions;
• determining design variables of the impeller, wherein the step of determining design variables of the impeller includes generating a vane shape of the impeller via a meridional view design operation and generating a vane angle of the impeller via a vane angle design operation, wherein the meridional view design operation includes inputting design variables of a meridional plane of the impeller, wherein the design variables of the meridional plane include an inner diameter R1h of a hub at an inlet of the impeller, an inner diameter R1t of a shroud at the inlet of the impeller, an angle φ1 at a leading edge of a vane of the impeller, a diameter R2 of an outlet of the impeller, a vane width b2 at a trailing edge of the vane of the impeller, an angle φ2 at the trailing edge of the vane, and an axial direction length Ztip from an inlet to an outlet of the shroud, wherein the angle φ1 at the leading edge of the vane of the impeller has tendencies according to sections of a specific speed of 150 to 1200 Ns, wherein the angle φ1 of the leading edge of the vane is provided in a database, the database being prepared by converting the tendencies of the design variables of the impeller according to the specific speed into functions;
• and
• generating a 3D shape of the impeller.