Numerical simulation of high Mach number side jet at high altitude

DOI:	10.11809/bqzbgcxb2024.04.018
Keywords:	thin atmosphere; self adaptation; lateral jet flow; interference flow field
Abstract:	In high altitude environment, lateral jet plays a key role in attitude conversion and thermal protection of aircraft. At the same time, due to the thin incoming flow, direct simulation Monte Carlo method (DSMC) has a good applicability for the simulation of lateral jet interference flow field. In this paper, based on the DSMC numerical algorithm of unstructured grid computing, an adaptive grid technique is proposed for the high density and shock region of jet flow. It can be used to simulate and predict the interference flow field of atmospheric incoming flow and lateral jet flow in the high thin region. By simulating two dimensional lateral jet flow, the reliability of the proposed algorithm was verified. The influence of time step on the flow field simulation results and the selection principle of the numerical value were studied. The complex interference flow field structure and gas dynamics under different jet/inflow pressure ratios were simulated and calculated.
Published:	2024-04-30
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