The flow distribution property of gas-solid two-phase in Y-Shaped branch pipe was expatiated. The pneumatic conveying experiments for millet and micro-glass bead with density a 1340 kg/m~3 and 2510 kg/m~3, average particle diameter 2 mm were carried out at horizontal Y-shaped branch pipe which were designed with one branch being unchanged (keeping 15deg) and the other being changeable (the angle values are 5°, 10°, 15°, 20°, 25°, 30° respectively). The flow distribution property was expressed by the ratio of the solid mass flowing in the changeable branch vs. the total mass of solid. The experimental results showed that the solid mass ratio of changeable branch decreases with the increasing of angle between the changeable branch and axis of main pipet The superficial gas velocity has little effect on the flow distribution characteristics when the superficial gas velocity is greater than the deposition velocity and when superficial gas velocity becomes less than the deposition velocityi the mass ratio increases with the decreasing of superficial gas velocityt Meanwhilei principal component analysis method was adopted to explore the importance of influencing factors and their correlationt The experimental consequences show that the angle between changeable branch and main pipe axisi superficial gas velocity are chief influencing factors which agree with the experimental consequence well.
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