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《Laser Journal》 2017-12
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Determination of gas-solid two-phase flow in key cross-section of turbulent fluidized bed by optical fiber-laser

ZHANG Changlian;ZENG Tao;LIU Shaobei;DONG Liang;Sichuan Key Laboratory of Process Equipment and Control Engineering,Sichuan University of Science & Engineering;  
Aiming at the lack of corresponding theory in the determination of the gas-solid two-phase flow characteristics of the critical cross section of the cyclonic turbulent fluidized bed,the accuracy of the measurement is low,which affects the application of the turbulent fluidized bed. The paper analyzes the flow characteristics of gas-solid two-phase flow in the critical section of the cyclonic turbulent fluidized bed by laser-fiber. By using the Gidaspow drag force model to calculate the fluid drag force,the empirical formula is used to calculate the gas and the calculation of the porosity in the critical cross section of the cyclonic turbulent fluidized bed is carried out by using the central detection method. Based on the calculation results of fluid drag force,gas-solid convection heat transfer flux and porosity.Based on this,the control of the convective diffusion problem of the gas-solid two-phase flow in the critical section of the cyclonic turbulent fluidized bed is determined by cable volume method. The dynamic model of the gas-solid twophase flow in the critical section of the turbulent fluidized bed is established to improve the accuracy of the gas-solid two-phase flow characteristics of the critical cross-section of the turbulent fluidized bed. The experimental results show that the proposed method can accurately measure the flow characteristics of gas-solid particles in the critical cross-section of the cyclonic turbulent fluidized bed and finish the determination of gas-solid two-phase flow characteristics.
【Fund】: 四川省科技支撑计划(2015GZ0037);; 四川省重点实验室开放基金(GK201608);; 四川理工学院创新基金(y2016018)
【CateGory Index】: TQ051.13
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