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首页> 外文期刊>Journal of Aerospace Sciences and Technologies >FLOW CONTROL IN SERPENTINE INLET DUCT USING VORTEX GENERATOR JETS
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FLOW CONTROL IN SERPENTINE INLET DUCT USING VORTEX GENERATOR JETS

机译：蛇形进气道的涡流发生器射流控制

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摘要

The objective of the present research is to study the effectiveness of steady and pulsed vortex generator jets in reducing inlet flow distortion and in improving pressare recovery by effective secondary flow control in uniform inflow serpentine duct diffuser. The measurements were carried out at a test Reynolds number of 6.5 ×10~5 based on the diffuser inlet width. Serpentine duct diffuser consisted of two main portions, namely, a square to circular constant area transition duct followed by a circular diffusing duct. Investigations show that the flow in the serpentine diffusing duct suffers from stall on the inner wall and consequently the outflow at AIP has considerable flow distortion due to the combined effect of secondary flow and the inner wall stall. It is observed that the use of vortex generator jets, both in steady and pulsed modes, improve the performance substantially. The number of jets, location of jets, velocity ratios and the pulse frequency are some of the variables that are studied. The results obtained so far suggest that use of pulsed jet not only gives better performance but also reduces the amount of air that is needed to be injected through the jets in comparison to steady jets for similar velocity ratios.
机译：本研究的目的是通过在均匀流入的蛇形管道扩散器中进行有效的二次流控制，研究稳定和脉冲涡流发生器射流在减少入口流量畸变和提高压力恢复方面的有效性。基于扩散器入口宽度，在测试雷诺数为6.5×10〜5的条件下进行测量。蛇形管道扩散器包括两个主要部分，即方形到圆形的恒定面积过渡管道，然后是圆形的扩散管道。研究表明，蛇形扩散管中的流动在内壁上受阻，因此，由于二次流和内壁失速的共同作用，AIP处的流出具有明显的流动畸变。可以看出，在稳定模式和脉冲模式下使用涡流发生器射流均可以显着提高性能。射流的数量，射流的位置，速度比和脉冲频率是一些需要研究的变量。到目前为止获得的结果表明，与具有类似速度比的稳定喷嘴相比，脉冲喷嘴的使用不仅可以提供更好的性能，而且可以减少需要通过喷嘴喷射的空气量。

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  • 来源
    《Journal of Aerospace Sciences and Technologies》 |2012年第3期|p.169-175|共7页
  • 作者

    Sushant Chandra; M.C. Keerthi; A. Kushari; R.K. Sullerey;

  • 作者单位

    Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur-208 016, India;

    Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur-208 016, India;

    Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur-208 016, India;

    Department of Aerospace Engineering Indian Institute of Technology Kanpur Kanpur-208 016, India;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    serpentine duct; flow control; pulse jets;

    机译：蛇形导管流量控制;脉冲射流;

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