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含能材料  2015 

锥形多股火药燃气射流与液体工质相互作用的实验研究

DOI: 10.11943/j.issn.1006-9941.2015.11.004

Keywords: 气液相互作用 多股燃气射流 湍流掺混 高速摄影

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Abstract:

为了解水下枪械的发射机理, 设计了锥形多股火药燃气射流与水相互作用的模拟实验装置, 借助高速摄像机研究了不同喷射压力、不同喷孔直径对多股燃气射流扩展特性的影响。实验结果表明:喷射压力增大, 燃气射流的扩展速度增大, 扩展过程中湍流不稳定性增强, 气液卷吸程度加剧; 喷射压力从10.8 MPa提高到28.8 MPa, 中心射流的扩展速度增大28%, 侧孔射流的扩展速度增大40%;中心喷孔直径由2 mm增大到3 mm, 中心射流的扩展速度增大29%, 侧孔射流的扩展速度增大26%, 但射流的速度下降趋势更明显, 而侧面喷孔直径的变化对射流扩展速度影响较小

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