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首页> 外文期刊>Journal of propulsion and power >Physical Insight into Fuel/Air Mixing with Hypermixer Injectors for Scramjet Engines
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Physical Insight into Fuel/Air Mixing with Hypermixer Injectors for Scramjet Engines

机译：使用超燃冲压发动机的Hypermixer喷油器对燃油/空气混合的物理洞察

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摘要

Efficient mixing of fuel and air is a major objective for the successful operation of scramjet engines, in which the supersonic combustion process must occur within an extremely short time frame in the hypersonic flight This paper presents the insights gained into the key design factors and underlying mechanism for fuel/air mixing enhancement with stream wise vortices introduced by alternating wedges called hypermixers. The results of a parametric numerical study and sensitivity analysis suggest that narrow spanwise intervals between the alternating wedges and large fuel/ air equivalence ratios are beneficial for effective mixing, while higher total pressure recovery is associated with shallower ramp angles and lower fuel/air equivalence ratios. Higher fuel penetration is achieved with steeper ramp angles and higher fuel/air equivalence ratios. Streamwise vortex circulation increases with wider spanwise spacing and steeper ramp angles, but effective mixing enhancement is observed only in the latter case.
机译：燃油和空气的有效混合是超燃冲压发动机成功运行的主要目标，超音速燃烧过程中超音速燃烧过程必须在极短的时间内发生。本文介绍了关键设计因素和潜在机理的见解。用于通过交替的楔形（称为超混合器）引入的流向涡流增强燃料/空气混合。参数数值研究和灵敏度分析的结果表明，交替楔形之间的窄翼展间隔和较大的燃油/空气当量比有利于有效混合，而较高的总压力回收率则与较浅的坡道角和较低的燃油/空气当量比相关。较陡的坡道角和较高的燃油/空气当量比可实现较高的燃油渗透率。流向涡流的循环随着展向间距的增大和倾斜角的增大而增加，但是只有在后一种情况下，才能观察到有效的混合增强。

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  • 来源
    《Journal of propulsion and power》 |2015年第5期|1423-1435|共13页
  • 作者

    Hideaki Ogawa; Masatoshi Kodera;

  • 作者单位

    RMIT University, Melbourne, Victoria 3001, Australia;

    Japan Aerospace Exploration Agency, Kakuda, Miyagi 981-1525, Japan;

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  • 正文语种 eng
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