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Regular Analysis of Aero-Diesel Piston Engine between Combustion Chamber Size and Emission

机译：航空柴油机发动机燃烧室尺寸与排放之间的规律分析

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摘要

The emission of aero-engines has been a focused issue, studying the regular of combustion chamber size on engine emission performance, with an aviation diesel piston engine as the object of study; the numerical model of diesel combustion spray and emission model are analyzed; and the dynamics grid of the combustion chamber is meshed by FIRE software, analyzing the relationship between the reentrant diameter, the maximum depth of the combustion chamber, and the emission generation, comparing the NOx and soot emissions under different combustion chamber sizes. The results show that reducing appropriately the reentrant-max diameter ratio and max diameter-max depth ratio of the combustion chamber can reduce emissions when maintaining the same compression ratio by adjusting the mid-depth. Modifying the geometry parameters of the combustion chamber to verify regularity, it was found that engine NOx emission decreased by 28% and soot emission decreased by 3.6% when changing the size, which verified the correctness of regular analysis.
机译：航空发动机的排放一直是一个关注的问题，以航空柴油活塞发动机为研究对象，研究燃烧室尺寸对发动机排放性能的规律。分析了柴油机燃烧喷雾的数值模型和排放模型；并通过FIRE软件对燃烧室的动力学网格进行网格划分，分析折返直径，燃烧室最大深度与排放量之间的关系，比较不同燃烧室尺寸下的NOx和烟尘排放量。结果表明，通过调节中间深度，适当降低燃烧室的凹角最大直径比和最大直径最大深度比可以减少排放，同时保持相同的压缩比。修改燃烧室的几何参数以验证规律性，发现改变尺寸后发动机NOx排放降低了28％，烟尘排放降低了3.6％，这证明了常规分析的正确性。

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  • 来源
    《International journal of aerospace engineering》 |2019年第2期|8690906.1-8690906.12|共12页
  • 作者

    Pan Zhongjian; Deng Yu; Cheng Lizhi;

  • 作者单位

    Changsha Univ, Sch Mech & Elect Engn, Changsha 410022, Hunan, Peoples R China;

    Sunward Intelligent Equipment Co Ltd, Changsha 410100, Hunan, Peoples R China;

    Changsha Univ, Sch Mech & Elect Engn, Changsha 410022, Hunan, Peoples R China;

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