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首页> 外文期刊>Journal of visualization >Visualization and analysis on the thrust vectoring control in three-dimensional dual-throat nozzles
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Visualization and analysis on the thrust vectoring control in three-dimensional dual-throat nozzles

机译：三维双辐射喷嘴止推矢量控制的可视化和分析

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摘要

The dual-throat vectoring nozzle is an efficient technique utilizing less high-pressure secondary streams to control mainstream deflections flexibly. In this article, three-dimensional Reynolds-averaged Navier-Stokes simulations were performed using a commercial computational fluid dynamics program, and the numerical methods applied in this study were validated through comparison with the experimental results. Two parameters of the slot injector have been investigated, namely the incident angle of the secondary stream and the slot length-to-width ratio. Critical performance parameters have been quantitatively analyzed, involving the pitching angle, injected mass flow ratio, system resultant thrust ratio, and resultant pitching thrust efficiency. Furthermore, visual flow-field features are expounded using Mach number contours on the center-plane, Mach number contours on various slices, and streaklines. Some meaningful conclusions are drawn herein. The flow field in this three-dimensional dual-throat nozzle is not fully symmetric based on the reference of the center-plane. Consequently, a full domain is essential to capture the flow characteristics accurately, instead of a half domain. Although the pitching angle for the secondary stream incidence angle of 120° is the highest, comprehensive characteristics in terms of resultant pitching thrust efficiency and system resultant thrust ratio for 150° are more outstanding. The pitching angle, system resultant thrust ratio, and resultant pitching thrust efficiency increase with an increase in the slot length-to-width ratio for a constant secondary stream mass flow rate. Under the circumstance of a constant injection pressure ratio, the pitching angle increases with an increase in the slot length, whereas system resultant thrust ratio and resultant pitching thrust efficiency decline with an increasing slot length.
机译：双喉矢量喷嘴是一种有效的技术，利用较少的高压次级流灵活地控制主流偏转。在本文中，使用商业计算流体动力学程序进行三维雷诺平均仿真，通过与实验结果进行比较，验证了本研究中应用的数值方法。已经研究了槽注射器的两个参数，即二次流的入射角和槽长到宽比。已经定量地分析了临界性能参数，涉及俯仰角，注射质量流量，系统产生的推力比，并得到俯仰推力效率。此外，在各种切片上的中心平面，马赫数轮廓上使用马赫数轮廓，以及各种切片上的马赫数轮廓阐述了视觉流场特征。这里绘制了一些有意义的结论。该三维双喉部喷嘴中的流场基于中心平面的参考来完全对称。因此，完整域是必要的，以准确地捕获流动特性而不是半域。虽然二次流入射角为120°的俯仰角是所带来的俯仰推力效率和系统所得的150°所产生的速度最高的综合特性。俯仰角，系统得到的推力比，并得到俯仰推力效率随着恒定的二次物流质量流量而增加的槽长到宽比的增加。在恒定注射压力比的情况下，俯仰角随着槽长度的增加而增加，而系统产生的推力比率和由此产生的俯仰止推效率随着槽长而下降。

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  • 来源
    《Journal of visualization》 |2021年第5期|891-915|共25页
  • 作者

    Kexin Wu; Tae Ho Kim; Heuy Dong Kim;

  • 作者单位

    Department of Mechanical Engineering Andong National University Andong Gyeongsangbuk-do 760-749 Republic of Korea;

    Department of Mechanical Engineering Andong National University Andong Gyeongsangbuk-do 760-749 Republic of Korea;

    Department of Mechanical Engineering Andong National University Andong Gyeongsangbuk-do 760-749 Republic of Korea;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Shock wave; Gas dynamics; Compressible flow; Internal flow; Supersonic flow;

    机译：激波;气体动力学;可压缩流动;内部流动;超音速流量;

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