颗粒流中的冲击力

PDF(1951 KB)

振动与冲击 ›› 2012, Vol. 31 ›› Issue (22) : 128-131.

论文

颗粒流中的冲击力

白光富，胡林，孔维姝

作者信息 +

The Momentum Of Particle Flow

BAI Guang-fu, HU Lin,Kong Wei-shu

Author information +

文章历史 +

摘要

作者通过实验研究了宽沟道内颗粒流冲击力沿沟道的分布，不同半径圆形颗粒的冲击力，还研究了冲击力谱曲线的渡越行为。实验结果表明：颗粒流稳定时，冲击力在沟道横向呈抛物线形分布；冲击力随着滑移距离L增大衰减；对于单一尺寸颗粒流,稳定时冲击力随着颗粒直径增大而增大；对于不同尺寸的混合颗粒流，冲击力随不同尺寸颗粒质量比增大先增加最后趋于饱和，存在指数关系；结果还表明力谱曲线的上升沿和下降沿有明显区别。结果对实验研究不同固相比泥石流冲击特性或泥石流理论研究提供科学借鉴。

Abstract

The impact distribution of granule flow is experimentally studied in the wide channel. Both the impact with varied granular radius and the transit charactristics of impact spectrum are also investigated. The experimental results indicate a parabolic impact distribution across the channel, the decay of impact along channel, the increase of impact upon granule radius, the exponential dependence of impact on granule scales upto saturation, and the obvious difference between the up-edge and the down-edge of impact spectrum. The studies suggest a possible mechanism to further understand of practical granular behavior with multiple components.