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建立了1台热输入0.1 MW的加压喷动流化床煤部分气化炉和相同尺寸的冷态模型试验装置,通过试验和数值模拟方法分析了压力对喷动流化床流动特性的影响.数值模拟采用了非稳态欧拉多相流模型,研究结果表明:随着工作压力增大,床内的中心喷动区和环形区的空隙率均相应减小;颗粒在较高工作压力下的轴向速度大于较低压力工况下的速度值;在压力为0.1~0.3 MPa时,模拟工况的流动状态与试验结果相符.
A heat input 0.1 MW pressurized spout fluidized bed coal partial gasifier and a cold model test device of the same size were established. The effects of pressure on the flow characteristics of the spouted fluidized bed were analyzed by means of experiments and numerical simulations The numerical simulation is based on the Euler multiphase flow model, and the results show that with the increase of the working pressure, the voidage in the central spout and the annular zone in the bed decreases correspondingly. At higher working pressure The axial velocity is higher than that under the lower pressure condition. When the pressure is 0.1-0.3 MPa, the flow condition under the simulated condition is consistent with the test result.