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Microjet Flow Control Effectiveness of Cavity Configurations at Low Speeds

机译:低速腔结构的微射流控制效果

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摘要

An experimental study was conducted to investigate the aeroacoustics of open- and closed-cavity configurations with and without flow control using microjets at low speeds. The cavity models had length-to-depth ratios of 2, 10, and 18, representing open, transitional, and closed cavities, respectively. The investigation was carried out at a flow speed of 16 meters per second. The microjet effectiveness was tested for jet velocities of 8,16 and 24 meters per second. The vortex shedding aft of the trailing edge was reduced when the microjet velocity was equal to that of the freestream (16 meters per second). The results from the transitional cavity experiment, with a length-to-depth ratio of 10, showed that either higher microjet velocities or different locations of the microjets may be required to have any significant effect on the cavity flow characteristics.
机译:进行了一项实验研究,以研究使用低速微射流进行有无流量控制的开放腔和封闭腔结构的航空声学。空腔模型的长深比为2、10和18,分别代表敞开,过渡和闭合空腔。研究以每秒16米的流速进行。测试微喷射效率对每秒速度为8,16和24米的喷射速度。当微射流速度等于自由射流的速度(每秒16米)时,后缘后部的涡流减少。长度与深度之比为10的过渡腔实验结果表明,可能需要更高的微射流速度或微射流的不同位置,才能对腔流特性产生重大影响。

著录项

  • 来源
    《Journal of Aircraft》 |2014年第5期|1391-1400|共10页
  • 作者

    Lada C.; Kontis K.;

  • 作者单位

    ESA, European Space Res & Technol Ctr, Prop & Aerothermodynam Div, NL-2200 Noordwijk, Netherlands;

    Univ Glasgow, Sch Engn, Glasgow G12 8QQ, Lanark, Scotland;

  • 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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