气固流化床中侧向射流穿透深度的研究

STUDY ON THE INCLINED JET PENETRATION LENGTH IN A GAS-SOLID FLUIDIZED BED

本文以小米和两种硅胶为物料，在314×25mm的二维射流流化床中，用摄像法研究侧向射流穿透深度，并得到了关联式，误差小于25％．当射流倾角变化范围不大、并忽略射流位置的影响时，可以得到简化公式，误差小于40％使用基于对流体模型的计算机程序进行模拟，分析了射流产生的机理，研究了射流气速、直径、倾角和位置对射流穿透深度的影响．模拟值和实验值较吻合．

Experimental investigation was made in a 314×25 mm two-dimensional gassolid jet fluidized bed containing millet or silica sand. The inclined jet penetration length was recorded by a video camera. From experimental data, a correlation equation was obtained, with a deviation below 25%. When the jets inclination angle is comparatively small, by neglecting the influence of jet position, a simplified equation can be obtained with average error below 40%. Numerical simulation was done by running a program based on a two-phase model.Different influences on the inclined jet penetration length was obtained and was compared with experimental data. The difference between the horrizontal and vertical jet was discussed.