整体式粒子分离器数值模拟

Numerical Simulation of Inertial Particle Separator

为找出分离效率更高、压力损失更小的最优型面设计,以两种型面差异较大的整体式惯性粒子分离器为研究对象,利用FLUENT计算软件对其内二维两相流动进行了数值模拟,得到了分离器对不同粒径的砂粒的分离效率,以及不同清除比对分离效率的影响,并对计算结果进行了比较分析。在此基础上,分析了型面对分离效率的影响因素。计算采用标准k-ε模型,颗粒相采用拉格朗日轨道模型。结果表明:对C规范砂,型面变化剧烈的模型(IPS01)的分离效率比型面变化平缓的模型(IPS02)的平均低1.60%,进气总压损失平均增大0.53%;对AC粗砂,分离效率前者比后者平均高0.25%,进气总压损失平均增大0.58%。相比较而言,IPS02更具实际应用价值。

In order to find the optimal profile which possesses a better separation efficiency and a lower pressure lose, numerical simulation are conducted for two phase flow in two different inertial particle separators with different profiles with the aid of compute software FLUENT. Separation efficiency is obtained for sands with different diameters, and the effects of different SCRs on it are also obtained. The results are compared on this basis and some analyses are conducted to determine the factors affecting the separation efficiency. The computations are performed by using standard be model, and the Lagrange track model for the phase of particle. The results show that for the C-specimen. sand, averagely the separation efficiency of the model with sharp figure （IPS01） is 1.60% lower than that of the model with smooth figure（IPS02）, and the inlet total pressure loss of the IPS01 is 0.53% higher than that of IPS02. And for the AC coarse dust, averagely the separation efficiency of the model with sharp figure（IPS01） is 0.25% higher than that of the model with smooth figure（IPS02）, and the inlet total pressure loss of the IPS01 is 0.58% higher than that of IPS02. To sum up, IPS02 has better actual application value.