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首页> 外文期刊>Combustion Science and Technology >NUMERICAL INVESTIGATIONS ON THE THRUST AUGMENTATION MECHANISMS OF EJECTORS DRIVEN BY PULSE DETONATION ENGINES
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NUMERICAL INVESTIGATIONS ON THE THRUST AUGMENTATION MECHANISMS OF EJECTORS DRIVEN BY PULSE DETONATION ENGINES

机译：脉冲爆轰发动机驱动射弹推力增强机理的数值研究

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摘要

Numerical simulations of a single ejector driven by one- and two-pulse detonation engines (PDE) were performed to investigate the thrust augmentation mechanism. The systems of conservative laws of inviscid fluid combined with the one-step chemical reaction model are discretized in Cartesian coordinates using the high resolution hybrid RoelHLL scheme and adaptive mesh refinement method, and integration in time is performed with a second-order Runge-Kutta method. Our results described the propagation processes of both primary detonation of PDE and secondary induced detonation wave inside the ejector. For a single detonation tube, the detonation gases were expelled from the ejector inlet first, then, a large amount of ambient air is entrained into the ejector with the development and propagation of detonation wave along the ejector. However, for the two-detonation tube case, both the level and duration of expelled flow increase due to the interaction of shocks near the intersection of tubes and ejector, which causes less ambient air to be entrained into the ejector and leads to a decrease of ejector thrust augmentation. Our results agree well with corresponding experimental results.
机译：对由一脉冲和两脉冲爆震发动机（PDE）驱动的单个喷射器进行了数值模拟，以研究推力增强机理。使用高分辨率混合RoelHLL方案和自适应网格细化方法，在笛卡尔坐标中离散化结合了一步化学反应模型的无粘性流体保守律系统，并通过二阶Runge-Kutta方法进行及时积分。我们的研究结果描述了PDE一次爆轰和喷射器内二次感应爆轰波的传播过程。对于单个引爆管，首先从引爆器入口排出引爆气体，然后，随着引爆波沿引爆器的传播和传播，大量的环境空气被夹带到引爆器中。但是，对于两爆管的情况，由于在管与喷射器相交处附近的冲击的相互作用，喷射流的水平和持续时间都增加，这导致较少的环境空气被夹带到喷射器中并导致喷射量的减少。推顶力增加。我们的结果与相应的实验结果非常吻合。

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  • 来源
    《Combustion Science and Technology》 |2011年第12期|p.1069-1082|共14页
  • 作者

    Huan-hao Zhang; Zhi-hua Chen; Xiao-hui Sun; Xiao-hai Jiang; Bao-ming Li;

  • 作者单位

    National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing, China;

    National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing, China;

    National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing, China;

    National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing, China;

    National Key Laboratory of Transient Physics, Nanjing University of Science & Technology, Nanjing, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    detonation; numerical simulation; supersonic ejection; unsteady ejector;

    机译：爆炸数值模拟超音速喷射不稳定喷射器;

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