柱状固粒两相边界层流场稳定性研究

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基金项目: 国家杰出青年科学基金资助项目(19925210)

Research on the Flow Stability in a Cylindrical Particle Two-Phase Boundary Layer

摘要: 从运动方程和本构方程出发,推导得到了含柱状粒子两相流场的修正Orr-Sommerfeld方程,然后在边界层流场中,采用数值计算方法,得到了含柱状粒子流场的稳定性中性曲线,给出了流场失稳的临界雷诺数.结果表明在所述情况下,柱状粒子对流场起着抑制失稳的作用,而且抑制的程度随着柱状粒子体积分数和长径比的增加而提高.
- 柱状粒子 /
- 两相流 /
- 边界层 /
- 稳定性
Abstract: Based on the momentum and constitutive equations, the modified Orr-Sommerfeld equation describing the flow stability in a cylindrical particle two-phase flow was derived. For a cylindrical particle two-phase boundary layer, the neutral stability curves and critical Reynolds number were given with numerical simulation. The results show that the cylindrical particles have a suppression effect on the flow instability, the larger the particle volume fraction and the particle aspect-ratio are, the more obvious the suppression effect is.
- cylindrical particle /
- two-phase flow /
- boundary layer /
- stability

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