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弹道学报  2013 

双孔式拉瓦尔喷管减后坐结构效能分析

Keywords: 拉瓦尔喷管,减后坐,数值仿真,两相流,初速

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Abstract:

为了深入研究拉瓦尔喷管减后坐结构,提出了一种新的拉瓦尔喷管减后坐结构――双孔式拉瓦尔喷管减后坐结构,利用一维两相流理论建立其发射过程动力学模型,以某航炮为研究对象进行数值仿真计算,分析了2个导气孔之间的距离对弹丸速度和减后坐效率的影响,并将其与单孔喷管前置式减后坐技术进行对比分析。计算结果表明,较之单孔喷管前置式减后坐结构,该方案在弹丸初速下降较小的情况下,最佳减后坐效率高达32.85%。

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