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Large-eddy simulation of shock-wave/boundary-layer interaction control using a backward facing step

机译:冲击波/边界层相互作用控制的大涡模拟

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摘要

A new passive flow control method, putting a backward facing step ahead of the shock interaction position, is numerically investigated, aiming to control the shock-wave/boundary-layer interaction in a rocket-based combined-cycle scramjet engine. The height of the step is designed to be smaller than the boundary layer thickness. Implicit large-eddy simulations of an oblique shock wave impinging on a supersonic turbulent boundary layer are performed to examine the efficiency of this flow control method. Results show that with the flow control the length of shock-induced separation bubble is increased, but its height is reduced. The upstream extending of the reflected shock is suppressed, which indicates that the flow control method is able to relieve or avoid the adverse effects caused by the inner going of the reflected shock into the air-intake of the engine. The mechanism and the influence of the applied control method on instantaneous, mean and statistical flow-fields are discussed. (C) 2018 Elsevier Masson SAS. All rights reserved.
机译:数值研究了一种新的被动流动控制方法,该方法使冲击相互作用位置向前向后退一步,旨在控制基于火箭的联合循环超燃冲压发动机中的冲击波/边界层相互作用。台阶的高度被设计为小于边界层的厚度。进行了冲击超音速湍流边界层的斜激波的隐式大涡模拟,以检验这种流量控制方法的效率。结果表明,通过流量控制,激波引起的分离气泡的长度增加,但高度减小。反射冲击的向上游的延伸被抑制,这表明该流量控制方法能够减轻或避免由于反射冲击的内部进入发动机进气而引起的不利影响。讨论了应用控制方法对瞬时,均值和统计流场的机理及其影响。 (C)2018 Elsevier Masson SAS。版权所有。

著录项

  • 来源
    《Aerospace science and technology》 |2019年第1期|1011-1019|共9页
  • 作者

    Li Weipeng; Liu Hong;

  • 作者单位

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Dept Aeronaut & Astronaut, Shanghai 200240, 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
  • 中图分类
  • 关键词

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