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首页> 外文期刊>Journal of Spacecraft and Rockets >Experiment of the Two-Dimensional Roughness Effect on Hypersonic Boundary-Layer Transition
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Experiment of the Two-Dimensional Roughness Effect on Hypersonic Boundary-Layer Transition

机译：二维粗糙度对高超声速边界层过渡的影响

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摘要

An experimental investigation of the effects of two-dimensional roughness on hypersonic boundary layers was carried out at the JAXA 0.5 m hypersonic wind tunnel using a 5 deg half-angle sharp cone at a freestream Mach number of 7.1 and a wide range of stagnation conditions. Aerodynamic heating distributions and surface pressure fluctuations were measured with and without roughness elements applied to the cone. A wavy wall roughness with a wavelength of 2δ located well upstream of the breakdown region had the effect of delaying transition. Surface pressure spectrum densities indicate that disturbances of the roughness wavelength are amplified compared to the smooth wall case. At a lower stagnation temperature, however, wavy wall roughness configurations had the same effect as regular roughness, and no discernible differences between wavy wall roughness and spherical roughness were observed, either in the transition point or in the pressure fluctuation spectrum.
机译：在JAXA 0.5 m高超音速风洞中，使用5度半角尖锥，在自由马赫数为7.1且停滞条件较宽的条件下，对二维粗糙度对高音速边界层的影响进行了实验研究。在有或没有将粗糙元素应用于圆锥体的情况下，测量了空气动力分布和表面压力波动。位于击穿区上游的波长为2δ的波状壁粗糙度具有延迟转变的作用。表面压力频谱密度表明，与光滑壁的情况相比，粗糙度波长的干扰得到了放大。然而，在较低的停滞温度下，波状壁粗糙度构型具有与常规粗糙度相同的效果，并且在转变点或压力波动谱中均未观察到波状壁粗糙度和球形粗糙度之间的可辨别差异。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2006年第4期|p.731-738|共8页
  • 作者

    Keisuke Fujii;

  • 作者单位

    Japan Aerospace Exploration Agency, Chofu, Tokyo, 182-8522, Japan;

  • 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 航空;
  • 关键词

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