铝粉/空气二维黏性两相爆轰的数值模拟

韦伟 翁春生

韦伟, 翁春生. 铝粉/空气二维黏性两相爆轰的数值模拟[J]. 爆炸与冲击, 2015, 35(1): 29-35. doi: 10.11883/1001-1455(2015)01-0029-07
引用本文: 韦伟, 翁春生. 铝粉/空气二维黏性两相爆轰的数值模拟[J]. 爆炸与冲击, 2015, 35(1): 29-35. doi: 10.11883/1001-1455(2015)01-0029-07
Wei Wei, Weng Chun-sheng. Numerical simulation for aluminum/air two-dimensional viscous two-phase detonation[J]. Explosion And Shock Waves, 2015, 35(1): 29-35. doi: 10.11883/1001-1455(2015)01-0029-07
Citation: Wei Wei, Weng Chun-sheng. Numerical simulation for aluminum/air two-dimensional viscous two-phase detonation[J]. Explosion And Shock Waves, 2015, 35(1): 29-35. doi: 10.11883/1001-1455(2015)01-0029-07

铝粉/空气二维黏性两相爆轰的数值模拟

doi: 10.11883/1001-1455(2015)01-0029-07
基金项目: 中央高校基本科研业务费专项基金项目(30920130112007);国防预研究基金项目(9140C300202120C30)
详细信息
    作者简介:

    韦伟(1980—), 女, 博士研究生, 讲师

  • 中图分类号: O381; TJ011.1

Numerical simulation for aluminum/air two-dimensional viscous two-phase detonation

  • 摘要: 为了深入研究爆轰波形成和传播的机理与特性,建立了管内铝粉/空气二维黏性两相爆轰过程的数学模型,采用守恒元与求解元方法进行数值计算,并对其物理参数的分布进行了分析。结果表明:管内燃烧转爆轰的初期,压力沿径向变化明显,与壁面碰撞有明显的反射波;燃烧转爆轰的中后期,压力沿轴向变化明显,但径向效应仍不能忽视,碰撞形成的反射波对最终稳定爆轰波的形成影响较大。研究结果同时表明:不仅铝粉颗粒初始半径对爆轰波的形成与传播有一定的影响;而且气体的黏性作用在研究爆轰管内近壁面处流场时不容忽视。研究结果有利于进一步揭示铝粉燃烧转爆轰的机理。
  • 图  1  不同时刻爆轰管内压力分布云图

    Figure  1.  Pressure contours at different times

    图  2  不同时刻爆轰管轴线处铝粉颗粒半径变化图

    Figure  2.  Particle radius at different times

    图  3  不同颗粒半径时爆轰管轴线处压力随时间变化图

    Figure  3.  Times evolution of the pressures along the axis of detonation tube for different particle radius

    图  4  爆轰波阵面附近速度云图

    Figure  4.  Velocity contours near the detonation wave

    图  5  不同时刻爆轰管管壁处速度变化图

    Figure  5.  Velocity profiles along the wall at different times

    图  6  不考虑黏性时t=44 μs时刻爆轰管内压力分布云图

    Figure  6.  Pressure contours at t=44 μs (taking no account of viscous)

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出版历程
  • 收稿日期:  2013-05-10
  • 修回日期:  2013-09-13
  • 刊出日期:  2015-01-25

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