两种带涡流室分解炉内气相流场的模拟对比研究

针对两种带涡流室的同种类型不同炉膛尺寸不同生产效率的分解炉建立模型，运用流体力学软件，采用Euler坐标系下的Realizable k-ε模型对分解炉内的气相流场进行了模拟与对比分析。结果表明，两种分解炉内气流场规律一致，气流进入炉膛后沿分解炉壁面螺旋上升，在分解炉中心区域则形成了低速区；但是，炉膛直径小的分解炉内的气流平均停留时间稍短，约为6.70 s，而炉膛直径大的分解炉气流平均停留时间则更长，约为9.45 s，表明其旋流程度更强，更有利于延长物料在炉内的停留时间。

Numerical Simulation Study on Gas-Flow Field in Two Kinds of Precalciner with the Swirl Chamber

Mathematical models were set up for two actual precalciners with swirl chambers for cement production. Three-Dimensional numerical simulations of gas-flow field were performed with computational fluid dynamics software in this paper. In Euler coordinate system,the fluid phase was expressed with the Realizable k-ε two equation model. The results of simulation showed that the characteristics of gas-flow of the two precalciners were similar. The gas rised spirally after being injected into the precalciner and the velocity in the center zone was lower. It also showed that larger diameter precalciner was more beneficial to prolong the residence time of materials in the precalciner,since the average residence time was 6. 7 s in the small precalciner and 9. 45 s in the big precalciner.