Numerical simulation of active transverse jet characteristics in high speed flows

DOI:	10.11809/bqzbgcxb2023.07.021
Keywords:	rarefied environment; transverse jet; momentum ratio; vortex system; jet characteristic
Abstract:	This paper uses numerical simulation to study the characteristics of transverse jets in a high speed and extremely rarefied environment from the perspective of application of transverse jets. The influence of variables like different jet pressure, temperature, velocity, angle and mainstream speed, and environmental pressure on transverse jet characteristics is explored, which provides important reference for the application of jets in attitude control forces. The simulation results show that the jet penetration depth significantly increases as the momentum ratio of the jets to the mainstream increases, and, at the same time, the radial impact on the mainstream flow field is farther. Besides, variation of the temperature field induced by jet mixing is more obvious than that of the pressure field, and the coupling surface moves forward as its temperature increases. The decrease of environmental pressure reduces the dimension of the mainstream vortex scale, and the center of the vortex moves forward. The change of the jet angle mainly affects the coupling position of the jet and the mainstream and the vortex distribution near the coupling position. Under different angle conditions, the vortex in the flow field is more complicated with a larger number of vortexes and stronger vortex interactions. The jet pressure and temperature have significant effect on the increase of the momentum ratio, while the increase of the pressure and temperature can significantly increase the jet reaction force. Therefore, different reaction forces can be achieved by flexibly adjusting the pressure and temperature. However, the influence of different mainstream environments and jet angles on the reaction force can be ignored.
Published:	2023-07-28
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