Dynamic Response Analysis of a High Pressure LH₂ Feed System

Abstract

Effect of compressibility of liquid hydrogen on dynamic response of a high pressure LH₂ turbopump system including pipes has been analyzed. Simulation results of a nonlinear compressible mathematical model have been compared with those of a nonlinear incompressible mathematical model. Design parameters of LE-7 engine were used to simulate steady state condition and the boundary condition of tank pressure as well as pump outlet pressure was controlled to simulate unsteady condition. Effects of dynamic characteristics parameters of a cavitating inducer such as cavitation compliance and mass flow gain factor on dynamic response of a compressible flow system were analyzed as well.