平面叶栅内气-固两相流场的高速摄影

 两相流中以球形阳离子交换树脂(平均直径d_p=600μm)为固体粒子,其在流场中运动轨迹基本上是直线。粒子末与壁面碰撞时粒子最终速度可达来流速度的40％～60％。碰撞后速度下降,碰撞后与碰撞前速度之比与入射角β_1有关。通过实验数据拟合得到U_(p2)/U_(p1)=1.0+0.166β_1-1.293β_1~2+0.689β_1~3-0.00329β_1~4。该式与他人结果有差别,说明模拟实验需进行相似理论分析,以选择适当的粒子。

EXPERIMENTAL INVESTIGATION ON GAS-PARTICLE FLOW IN CASCADE BY HIGH SPEED PHOTOGRAPH

Optical measurements of solid particle velocities and collision process were made in cascade flow by the use of high-speed photogragh. The resin spheres with mean diameter of 600μm were injected into a cascade tunnel to produce the desired gas-particle flow. The film analysis provided the data for the particle velocities, paths and collision process. The results of this study are helpful for understanding the features of solid-particle's motion and collision process.