| Citation: | LIU Junlin, ZHANG Zihe, ZHANG Zhicheng, et al. Research on the influence of water injection parameters on flow field of rocket jets[J]. Journal of Aerospace Power, 2023, 38（10）：2415-2429 doi: 10.13224/j.cnki.jasp.20230292
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A study on the effects of different water injection conditions on the jet flow field of a rocket model was performed. The numerical calculation of the jet flow field of a single nozzle rocket during water injection was carried out based on the computational fluid dynamics (CFD) and Mixture model. The effects of water injection on average temperature, pressure, velocity and turbulent kinetic energy field of rocket jet were analyzed in different water injection velocities and flow rate conditions. The results showed that when the water injection speed was greater than 30 m/s, the temperature and speed of the nozzle jet can be effectively reduced. When the water injection speed was lower than 20 m/s, the influence of water injection on physical quantity of the jet axis became smaller. When the water injection speed was 30 m/s and the flow rate was more than 2.2 times the nozzle jet second flow rate, the nozzle jet temperature and speed can be effectively reduced. When the action point of water injection and the jet were located at the first three shock wave positions of the nozzle jet, the water injection had a good effect on the jet cooling and velocity reduction, and the closer the operation point was to the upstream, the more obvious the impact on the nozzle jet was. However, in practical engineering applications, the injection should avoid splashing on the nozzle.
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