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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical study on supersonic combustion with cavity-based fuel injection
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Numerical study on supersonic combustion with cavity-based fuel injection

机译：基于腔的燃料喷射超音速燃烧的数值研究

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摘要

The present study describes the numerical investigations concerning the combustion enhancement when a cavity is used for the hydrogen fuel injection through a transverse slot nozzle into a supersonic hot air stream. The cavity is of interest because recirculation flow in cavity would provide a stable flame holding while enhancing the rate of mixing or combustion. Several inclined cavities with various aft wall angle, offset ratio and length are evaluated for reactive flow characteristics. The cavity effect is discussed from a viewpoint of total pressure loss and combustion efficiency. The combustor with cavity is found to enhance mixing and combustion while increasing the pressure loss, compared with the case without cavity. But it is noted that there exists an appropriate length of cavity regarding the combustion efficiency and total pressure loss.
机译：本研究描述了当腔体用于通过横向狭缝喷嘴向超音速热气流中注入氢燃料时燃烧增强的数值研究。腔是令人感兴趣的，因为腔中的再循环流将提供稳定的火焰保持，同时提高混合或燃烧的速率。评估了具有不同后壁角度，偏移比和长度的几个倾斜型腔的反应流动特性。从总压力损失和燃烧效率的角度讨论空腔效应。与没有空腔的情况相比，发现具有空腔的燃烧器可以增强混合和燃烧，同时增加压力损失。但是要注意的是，关于燃烧效率和总压力损失存在适当的空腔长度。

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