Effect of Injector Pressure Drop on The ‎Performance of A 1 N Monopropellant ‎Thruster

Rajabi, Alireza; Qadiri Massoom, Noordin; Amirifar, Mohammadali; Rouholamini, Seyyed Rashad; Mikaniki, Pouria; Ghorbi, Mohammad; Kamranifar, Majid

doi:10.30699/jsst.2022.1301

Document Type : Research Paper

Authors

Institute of Space Transportation Systems, Iran Space Research Institute, Tehran, Iran

https://doi.org/10.30699/jsst.2022.1301

Abstract

The effects of injector pressure drop on the performance of a catalytic reactor are studied experimentally. The injectors were simple orifices. Dynamic interactions between the injector and the reactor determine the transient behavior of the system. Results showed that the injector pressure drop affected neither the decomposition reaction efficiency nor the ignition delay time. However, pressure response time increased, and pressure roughness decreased with increasing injector pressure drop. Interestingly, the response time curve had a slope change at a 20% pressure drop. As discussed in the paper, the slope change is a result of cavitation phenomena in high pressure drop. It is concluded that cold injector tests are not enough for injector design validation, and performance tests are necessary tasks.

Keywords

Main Subjects

Space systems design (spacecraft, satellites, space stations and their equipment)

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Effect of Injector Pressure Drop on The ‎Performance of A 1 N Monopropellant ‎Thruster

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Volume 15, Issue 4 - Serial Number 54December 2022Pages 19-29

Volume 15, Issue 4 - Serial Number 54
December 2022
Pages 19-29