In order to solve the problems of unstable quality of drying materials and low utilization rate of hot air caused by uneven distribution of hot air flow inside the dryer,a new vertical multi-layer hot air dryer was taken as the research object,and the EDEM-FLUENT gas-solid two-phase flow coupling method was used to simulate and analyze the air flow inside the air duct of different structures.The influence of different design structures in the inner cavity of the dryer on the distribution of hot air speed and drying efficiency was studied,and the wind speed distribution and non-uniformity coefficient were used as evaluation indexes to optimize the baffle structure of the inner cavity.A relatively ideal design scheme was obtained through comparative testing.Simulation results show that improving vertical wall tilt Angle,side wall tilt Angle and step spacing can effectively improve air distribution uniformity.When the air supply velocity ranges from 8 to 12 m/s,the flow distribution is relatively uniform and the fluctuation of non-uniform coefficient is the smallest.
关键词
风道设计/结构优化/数值模拟/气流分布/计算流体力学
Key words
air duct design/structural optimization/numerical simulation/airflow distribution/computational fluid dynamics
维普
万方数据