Study of  Two-phase Flow in Injector Tube of Monopropellant Thruster

doi:10.3780/j.issn.1000-758X.2013.02.008

Abstract

Abstract: During the application of satellite propulsion systems, the high temperature raised in the process of monopropellant thruster is transferred to the injector tube, leading to the two-phase flow phenomenon. As the massflow of propellant decreases, the pneumatic resistance will increase accordingly. By using the FLUENT software, the influence of pneumatic resistance on the thruster performance was studied. Based on the proportion fraction model and government equations of multiphase flow, the flow and pressure distribution in the injector tube under 84 operating conditions were presented. Furthermore, special tests on multiphase flow-combustion pressure relationship were also performed. Experimental and numerical results show that the pneumatic resistance can result in the sudden variety of pressure drop when the inner diameter of injector tube is small enough, and which cause the decreased thrust ultimately.

Key words: Monopropellant thruster, Injector tube, Pneumatic resistance, Two-phase flow, Spacecraft

CHEN Jun, WANG Meng. Study of Two-phase Flow in Injector Tube of Monopropellant Thruster[J]. Chinese Space Science and Technology, 2013, 33(2): 47-53.

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URL: https://journal26.magtechjournal.com/kjkxjs/EN/10.3780/j.issn.1000-758X.2013.02.008

https://journal26.magtechjournal.com/kjkxjs/EN/Y2013/V33/I2/47

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Study of Two-phase Flow in Injector Tube of Monopropellant Thruster

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