筛孔塔板干板压降的数值模拟  

Three dimensional simulation of sieve tray dry plate pressure drop

作　　者：张平[1] 王学平[1] 秦然[1] 吴剑华[2] 

机构地区：[1]沈阳化工大学机械工程学院,辽宁沈阳110142 [2]沈阳化工大学能源与动力工程学院,辽宁沈阳110142

出　　处：《化学工程》2015年第1期65-68,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21106086;21306115);博士科研启动基金项目(20141085)

摘　　要：分别应用标准k-ε模型、RNG k-ε模型和Realizable k-ε模型3种湍流模型并结合有限体积法,在不同空塔气体动能因子下数值模拟了筛孔塔板(0.38 m)的干板压降。数值计算结果分别同Hughmark-O'connell和Leibson实验结果进行了比较,吻合较好。通过模型对比,发现RNG k-ε模型和Realizable k-ε模型计算结果同实验结果比较接近,标准k-ε模型的计算结果误差较大。利用RNG k-ε模型研究了塔板厚度、筛孔直径同塔板干板阻力系数的关系曲线,随着筛孔直径和塔板厚度的增加,塔板阻力系数增加,相对于塔板厚度,筛孔直径的大小对阻力系数的影响更大。证明了计算流体力学在筛孔塔板干板压降的研究中有一定的可行性。Making using of standard k-ε model, RNG k-ε model and Realizable k-ε model with finite volume method, several three dimensional simulations of dry plate pressure drop were carried out for a 0.38 m diameter tray with varying gas kinetic energy factor. The dry plate pressure drop determined from these simulations is in reasonable agreement with the experimental measurements carried out by Hughmark-O＇connell and Leibson. The simulation results show that RNG k-ε model and Realizable k-ε model have less deviation than standard k-ε model by comparing three different turbulence models. The effects of sieve diameter, plate thickness and sieve free area on plate drag coefficient were developed with RNG k-ε turbulence model. The plate drag coefficient increases with the increasing of sieve diameter and plate thickness. The effect of sieve diameter is larger than that of plate thickness for plate drag coefficient. It concludes that computational fluid dynamics （CFD） can be used as a prediction of dry plate pressure drop on sieve trays under different sieve diameter, plate thickness and sieve free area.

关 键 词：湍流模型 干板压降 计算流体力学 阻力系数 

分 类 号：TQ053.5[化学工程]