一种新型吸油烟机集烟方式的数值研究  

Numerical Study of a New Method of Collecting Fume for an Exhaust Hook

作　　者：陈雪江[1] 赵岐山 冯健美[1] Xue-jiang Chen;Qi-shan Zhao;Jian-mei Feng(School of Energy and Power Engineering,Xi'an Jiaotong University)

机构地区：[1]西安交通大学能源与动力工程学院

出　　处：《风机技术》2020年第5期24-31,共8页Chinese Journal of Turbomachinery

基　　金：国家自然科学基金面上项目(51976154)。

摘　　要：在通风量一定的情况下,吸油烟机集烟腔的结构设计会很大程度上影响其排烟效果。为了更加精确地计算厨房内部油滴颗粒浓度,本文引入标准k-ε湍流模型和多相流混合物模型,考虑浮升力的影响,提出了厨房内油烟的三维、稳态、不可压缩、有着强烈的混合对流及气液两相流的湍流流动的数值模型,并对一特定的烹饪过程进行了模拟,求解并分析了厨房内部的速度、温度、油滴颗粒浓度分布情况。其次,论文对原始集烟腔进行初步改进,提出了“中央吸气、四周拢烟”的全新排烟方式,并通过数值对比,发现新提出的集烟腔结构能够有效地提高吸油烟机的排烟效果,大幅降低人体呼吸点的油烟浓度。最后,对比研究了挡流板不同开孔面积对集烟腔排烟性能的影响,并根据影响规律最终确定了挡流板中央开孔的最佳面积。With the same flow rate of air,the structure design of the chamber of fume collection will greatly affect the smoke exhaust effect.In order to get more accurate computational results about the distribution of oil-particle in the kitchen,the standard k-εturbulent model and multiphase mixture model were applied.Considering the influence of buoyancy,a numerical model was proposed to solve the three dimensional,steady,incompressible,strongly mixed convection and gasliquid two-phase turbulent flow.Based on this model,the flow for a specific cooking process in the kitchen was calculated,and the velocity,temperature and concentration of oil-particle were obtained and analyzed.And then,the structure of chamber of fume collection was improved based on a new concept of exhausting fume in the central and confining fume around the fringe.The simulation results showed that much lower concentration of oil-particle at breath point was obtained for the new structure,and excellent performance of collecting fume was achieved.Finally,the effects of size of square hole on the performance of collecting fume were also studied,and an optimal size of hole was finally obtained based on the analysis.

关 键 词：烹饪过程 吸油烟机集烟腔 集烟性能 温度 油滴颗粒浓度 

分 类 号：TH432[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]