Simulation Study on Pressure Holding Process of Cold Air Simulated Rocket Interstage Separation Test
Interstage thermal separation is one of the core technologies in the flight process of solid rocket. The traditional "three in one" test usually includes three main subsystems:upper stage motor,servomechanism and separation system. For practical engineering development,it is costly,expensive and long cycle. It can only be used for system level performance verification test,and is not suitable for exploratory developmental test. Based on the new ground test method of cold air simulated rocket interstage separation test,combined with theoretical model,numerical simulation and ground test verification,the internal flow field in the initial pressure holding stage of interstage separation is simulated,the law of gas pressure change in interstage section is revealed,and the test mechanism of cold air simulated rocket interstage separation is expounded;Through numerical simulation analysis,the effects of different initial pressure of pressure accumulator,different volume of pressure accumulator,different pipe area and different volume of interstage section on the change of gas pressure are studied,which provides a solution for the design of interstage separation test of cold air simulation.
cold air simulationinterstage separationpressure holding processnumerical simulationpressure change
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