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兵工学报  2014 

聚乙烯在固体燃料冲压发动机中的燃速影响因素研究

DOI: 10.3969/j.issn.1000-1093.2014.11.008, PP. 1783-1789

Keywords: 兵器科学与技术,固体燃料冲压发动机,聚乙烯,燃速

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Abstract:

?针对影响聚乙烯(PE)在固体燃料冲压发动机燃烧室中的燃速因素,采用数值仿真与直连式实验相结合的方法,研究了空气质量通量和固体燃料内径对PE燃料平均燃速和当地燃速的影响,分析了无量纲回流区长度与突扩台阶高度的关系。研究表明,PE燃料平均燃速与空气质量通量呈幂函数递增关系,与固体燃料内径呈幂函数递减关系;点火过程的影响以及湍流燃烧模型对突扩台阶后回流区内传热的计算精度是引起回流区内计算结果与实验结果误差较大的重要原因;无量纲回流区长度与突扩台阶高度呈线性递增函数关系。研究结果对固体燃料冲压发动机燃烧室的设计具有一定的参考价值。

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