基于EDEM-FLUENT耦合的脱水蔬菜烘干机内部风道仿真设计

摘要/Abstract

摘要： 为解决烘干机内部热风气流分布不均匀而导致烘干物料质量不稳定、热风利用率低等问题，以新型立式多层热风烘干机为研究对象，采用EDEM-FLUENT气固两相流耦合方法对不同结构内部风道的气流进行仿真分析，研究烘干机内腔不同设计结构对热风风速分布和烘干效率的影响，并以风速分布和不均匀系数为评价指标对内腔挡板结构进行优化，通过对比测试得到相对理想的设计方案。仿真结果表明，改进风道竖直壁面倾斜角度、侧壁倾斜角度和阶梯间距可以有效提升气流分布均匀性。风道供气速度范围为8~12 m/s时，气流分布相对均匀、不均匀系数波动幅度最小。

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

Abstract:

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.

Key words: air duct design, structural optimization, numerical simulation, airflow distribution, computational fluid dynamics

中图分类号:

TS255.8
S126

胡博, 刘尧, 张勇军, 龙艳. 基于EDEM-FLUENT耦合的脱水蔬菜烘干机内部风道仿真设计[J]. 中国农机化学报, 2024, 45(12): 116-126.

Hu Bo, Liu Yao, Zhang Yongjun, Long Yan. Simulation design of internal air duct of dehydrated vegetable dryer based on EDEM-FLUENT coupling[J]. Journal of Chinese Agricultural Mechanization, 2024, 45(12): 116-126.

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