Abstract
A new dynamic design method of turbopumps is introduced. In which the dynamic characteristics of them are taken into account and optimized in addition to the static characteristics of them in advance. In the present study, an interactive method to optimize the internal flow system and to verify the feasibility of the axial thrust balancing system is investigated. Configuration of the model investigated is a two-stage centrifugal LH2 turbopump with an inducer driven by a two-stage impulse turbine. First of all, axial thrust balancing range was confirmed, that is whether or not axial thrust balancing is capable for the configuration selected. Secondly, leakage flow rate of every point in the internal flow system was evaluated. Finally, the stability of the axial thrust balancing system was evaluated
