Numerical study on high-altitude lateral jet based on nonlinear coupled constitutive relation

  • Yifeng HUANG ,
  • Shuhua ZENG ,
  • Zhongzheng JIANG ,
  • Weifang CHEN
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  • College of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China

Received date: 2022-06-29

  Revised date: 2022-07-27

  Accepted date: 2022-08-26

  Online published: 2022-08-31

Supported by

National Natural Science Foundation of China(12002306)

Abstract

As the altitude climbs, the aircraft control efficiency by the pneumatic rudder drops sharply with the increase of the Kn number, when the lateral jet, as the most commonly used type of a Reaction Control System (RCS), plays a key role in the aircraft maneuvering process. Despite the good performance of the Navier-Stokes(NS) equations in low-altitude continuous flow problems, they fail to predict the slip flows (0.01<Kn<0.1) and even the transitional flows (0.1<Kn<10) due to the breakdown of continuity assumptions. To accurately capture the flow interference characteristics of the lateral jet and free stream in the rarefied transitional flow regime, this paper simulated typical lateral jet flow problems at different altitudes using the Nonlinear Coupled Constitutive Relations (NCCR) model and the NS model. The results of Direct Simulation of Monte Carlo (DSMC) were compared to further illustrate the reliability of the NCCR model in these cases. The research showed that the simulation results of the NCCR model and NS model have a high consistency in the continuous flow regime, and the NCCR model can more accurately predict the separation zone size and surface flow characteristics near the nozzle in the slip flow and transitional flow regimes. Moreover, compared with the NS equations, the NCCR model agrees better with the DSMC prediction in describing the complex flow mechanism of shock-shock interaction caused by the lateral jet.

Cite this article

Yifeng HUANG , Shuhua ZENG , Zhongzheng JIANG , Weifang CHEN . Numerical study on high-altitude lateral jet based on nonlinear coupled constitutive relation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022 , 43(S2) : 8 -22 . DOI: 10.7527/S1000-6893.2022.27700

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