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首页> 外文期刊>Aerospace science and technology >Numerical investigation and optimization on the micro-ramp vortex generator within scramjet combustors with the transverse hydrogen jet
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Numerical investigation and optimization on the micro-ramp vortex generator within scramjet combustors with the transverse hydrogen jet

机译：横向氢射流超燃燃烧室中微匝涡发生器的数值研究与优化

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摘要

An effective fuel supply strategy with high mixing efficiency, large penetration depth and low stagnation pressure losses determines the overall performance of the scramjet (supersonic combustion ramjet) engine. In this paper, the transverse hydrogen injection flow field with a micro-ramp located upstream of the wall orifice has been investigated numerically based on the code validation. There are four design variables considered in the current study, namely the width, length, and height of the micro-ramp and the distance between the center of the wall orifice and the trailing point of the micro-ramp. Nine cases predicted by the three-dimensional Reynolds-averaged Navier-Stokes (RANS) equations coupled with the two equation k-omega shear stress transport (SST) turbulence model are used for parametric analysis, and the parametric analysis has been carried out by the extreme difference analysis approach. Three optimization cases are obtained, and they have different objectives, namely the minimization of the mixing length, the maximization of the penetration depth and the minimization of the stagnation pressure losses. The flow structures of all cases have been discussed and compared. The quantitative evaluation results of three optimization cases show that the extreme difference analysis approach is an efficient parametric analysis method, and it can obtain the optimal strategy for the micro-ramp within scramjet combustors with the transverse hydrogen jet. (C) 2018 Elsevier Masson SAS. All rights reserved.
机译：具有高混合效率，大穿透深度和低停滞压力损失的有效燃料供应策略决定了超燃冲压发动机（超音速冲压冲压发动机）的整体性能。在本文中，基于代码验证，对位于壁孔上游的带有微斜坡的横向氢注入流场进行了数值研究。当前研究中考虑了四个设计变量，即微斜坡的宽度，长度和高度以及壁孔中心与微斜坡的尾部之间的距离。将三维雷诺平均Navier-Stokes（RANS）方程与两个方程k-omega剪应力输运（SST）湍流模型相结合预测的9种情况用于参数分析，并且参数分析已通过极端差异分析方法。获得了三种优化情况，它们具有不同的目标，即混合长度的最小化，穿透深度的最大化和停滞压力损失的最小化。对所有案例的流程结构进行了讨论和比较。对三个优化案例的定量评估结果表明，极差分析法是一种有效的参数分析方法，它可以利用横向氢射流获得超燃燃烧室中微匝道的最优策略。 （C）2018 Elsevier Masson SAS。版权所有。

著录项

  • 来源
    《Aerospace science and technology》 |2019年第1期|570-584|共15页
  • 作者

    Li Lang-quan; Huang Wei; Yan Li; Du Zhao-bo; Fang Ming;

  • 作者单位

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Hunan, Peoples R China|Chinese Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Hunan, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Hunan, Peoples R China;

    Natl Univ Def Technol, Sci & Technol Scramjet Lab, Changsha 410073, Hunan, Peoples R China;

    Chinese Aerodynam Res & Dev Ctr, Hyperveloc Aerodynam Inst, Mianyang 621000, 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

    Vortex generator; Optimization; Micro-ramp; Mixing length; Penetration depth; Stagnation pressure loss;

    机译：涡旋发生器;优化;微匝;混合长度;穿透深度;停滞压力损失;

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