Abstract Hypersonic shock tunnel studies of Edney Type Ⅲ and Ⅳ shock interactions
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Hypersonic shock tunnel studies of Edney Type Ⅲ and Ⅳ shock interactions

机译:高超声速冲击隧道研究埃德尼Ⅲ和Ⅳ型冲击相互作用

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摘要

AbstractOf all the possible outcomes of the shock interaction problem, Edney Type-III and Type-IV are considered to be of great importance as they lead to high heat transfer rates on the surface in the vicinity of the interaction. The enhancement in heat transfer occurs because of shear layer attachment in Type-III interaction and impingement of supersonic jet in Type-IV interaction. In this study, unsteady nature of these interactions is studied in conventional shock tunnel at moderate enthalpy condition of 1.07 Mj/kg at flow Mach number of 5.62. A hemispherical model, 50 mm in diameter, mounted with thin film Platinum gauges is used along with a 25° wedge to serve as a shock generator. The schlieren images are captured along with the surface convective heat transfer rate measurements for the analysis of flowfield over the model during the test time. The pixel intensity scan is performed along several lines running horizontally to estimate the steadiness of the flowfield. These are correlated with the heat transfer rate measurements to understand the non-steady nature of the interaction during the small test times offered by the shock tunnel.
机译: 摘要 在冲击相互作用问题的所有可能结果中,埃德尼(Edney)III型和IV型被认为非常重要,因为它们导致相互作用附近表面上的高传热率。传热的增强是由于III型相互作用中的剪切层附着和IV型相互作用中超音速射流的撞击。在这项研究中,在常规的激波隧道中,在1.07 Mj / kg的中等焓条件下,在流动马赫数为5.62的情况下,研究了这些相互作用的不稳定性质。使用直径为50 mm的半球形模型,该模型安装有薄膜铂规,并与25°楔形一起用作震动发生器。随时间流逝的图像与表面对流传热速率测量值一起捕获,以分析测试期间模型上的流场。沿水平延伸的几条线执行像素强度扫描,以估计流场的稳定性。这些与传热速率测量相关联,以了解在冲击隧道提供的小测试时间内相互作用的非稳态性质。

著录项

  • 来源
    《Aerospace science and technology》 |2018年第1期|335-352|共18页
  • 作者单位

    Department of Aerospace Engineering, Indian Institute of Science;

    Department of Aerospace Engineering, Indian Institute of Science;

  • 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
  • 中图分类
  • 关键词

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