AbstractFor the pressure reducing regulator and check valve double-valve combined test system in an integral bipropellant propulsion system, a system model is established with modular models of various typical components. The simulation research is conducted on the whole working process of an experiment of 9MPa working condition from startup to rated working condition and finally to shutdown. Comparison of simulation results with test data shows: five working conditions including standby, startup, rated pressurization, shutdown and halt and nine stages of the combined test system are comprehensively disclosed; valve-spool opening and closing details of the regulator and two check valves are accurately revealed; the simulation also clarifies two phenomena which test data are unable to clarify, one is the critical opening state in which the check valve spools slightly open and close alternately in their own fully closed positions, the other is the obvious effects of flow-field temperature drop and temperature rise in pipeline network with helium gas flowing. Moreover, simulation results with consideration of component wall heat transfer are closer to the test data than those under the adiabatic-wall condition, and more able to reveal the dynamic characteristics of the system in various working stages.
HighlightsEstablish a low-cost and convenient virtual test platform for engineering test.Simulation results considering wall heat transfer are closer to test data.Fully disclose five working conditions and nine stages of engineering system.Accurately reveal valve-spool opening and closing details of PRR and CV.Clarify obvious temperature drop and rise effects of various component flow fields.
Dynamic modeling and simulation of an integral bipropellant propulsion double-valve combined test system
Acta Astronautica ; 133 ; 346-374
2016-10-11
29 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch