Geometrical Design of Turbo Pump's Rotor by the Power Law Methodology

A rotor design methodology for the turbo-booster pump (TBP) by the power law method is investigated Rotor geometrics, like ditches of groove and pitch angles of blade, can be modeled by a power N of axial position along rotating axis. Blade surfaces can then be modeled using the proposed power expression. To investigate the inlet pressures and speeds of the designed rotor, the DSMC simulation methodology is adopted to calculate the details of the pumping flow inside the channels. The inlet pressures and speeds depend upon the index N. As N increase, inlet pressures increase and speeds decrease. Comparison to the design of Jou et al. is shown. The result shows an optimum index N can be chosen to meet the speeds to experiment. And it proves successful application of the power law method to design of TBP rotor.