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首页> 外文期刊>Journal of Spacecraft and Rockets >Fluid-Thermal Interaction Investigation of Spiked Blunt Bodies at Hypersonic Flight Condition
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Fluid-Thermal Interaction Investigation of Spiked Blunt Bodies at Hypersonic Flight Condition

机译：高超声速飞行条件下尖刺钝体的流热相互作用研究

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摘要

A spiked blunt body flying at hypersonic speed could result in significant thermal interactions between the external flowfield and the internal structure, which have not received enough attention in previous investigations. In the present study, time-dependent, loosely coupled fluid-thermal interaction simulations are conducted on a blunt body equipped with a spike with variable length at a M=5, Re=2x106 flight condition. The results show that, in the range of time considered in the study, a blunt body with a longer spike yields a better dynamic thermal performance, that is, a lower peak temperature on the blunt forebody surface and a slower temperature rise both on the forebody surface and inside the structure can be obtained. In addition, various levels of drag coefficient drop can be observed during the coupling process. A maximum decrease of 5.7% is achieved among the investigated models. The study reveals the necessity of the coupled fluid-thermal analysis to accurately predict the aerothermal environment of the spiked blunt body and to capture the variation of aerodynamic force, which is critical for structural design and flight control system, respectively.
机译：尖刺的钝体以高超声速飞行可能会导致外部流场与内部结构之间发生显着的热相互作用，这在先前的研究中并未得到足够的重视。在本研究中，在M = 5，Re = 2x106飞行条件下，对带有钝头的钝体进行了时变，松散耦合的流体-热相互作用模拟。结果表明，在研究中考虑的时间范围内，具有较长尖峰的钝体会产生更好的动态热性能，即钝体前体表面上的峰值温度较低，而前体上的温度升高都较慢。可以获得结构的表面和内部。另外，在耦合过程中可以观察到各种水平的阻力系数下降。在所研究的模型中，最大降低幅度为5.7％。这项研究表明，必须进行流热耦合分析，以准确预测尖刺钝体的空气热环境并捕获空气动力的变化，这分别对结构设计和飞行控制系统至关重要。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2016年第4期|629-643|共15页
  • 作者

    Guo Shuai; Xu Jinglei; Qin Qihao; Gu Rui;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, 29Yudao St, Nanjing 210016, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, 29Yudao St, Nanjing 210016, Peoples R China|AIAA, Reston, VA 20191 USA;

    Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, 29Yudao St, Nanjing 210016, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Energy & Power Engn, Jiangsu Prov Key Lab Aerosp Power Syst, 29Yudao St, Nanjing 210016, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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