方形分离器入口高宽比及直段高度对分离性能的影响  

Effect of Height to Width Ratio at Entrance and of the Straight Section's Height on the Performance of Rectangular Shaped Cyclone Separators

作　　者：王玉召[1] 侯祥松[1] 吴玉新[1] 王进伟[1] 李少华[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《动力工程》2007年第2期184-188,共5页Power Engineering

基　　金：清华大学热能系基础科研基金

摘　　要：为了研究结构参数对方形分离器性能的影响,设计了15个不同入口高宽比(a/b)和直段高度(h)的入口带加速段的方形分离器,每一个分离器都具有相同的直段边长(D),入口高宽比的变化范围为3.8~10.6,直段高度的变化范围为1.8D^2.8D。在大型冷态试验台上相同的运行工况下,测试了它们的分离器效率及阻力。结果表明:随着入口高宽比的增大,分离效率先增大后减小,在a/b=8时分离效率最高;随着直段高度的增大,分离效率先减小后增大,在h=2.3D时效率最低。分离器阻力随着入口高宽比增大而增大,随着直段高度的减小而减小。二者优化值为a/b=8和h=1.8D,对应的分离器阻力为1.22 kPa。15 rectangular shaped cyclone separators provided, with an acceleration section have been designed for different height to width （a/b） ratio at entrance and different heights （h） of the straight section; the edge length （D） of all the straight sections remaining constant while the height to width ratio of the entrance varies between 3.8 - 10.6 and height of the straight section varies between 1.8 D - 2.8 D. Their separation efficiencies and flow resistances were all measured, under the same operating conditions, in a large scale cold state test rig. Results indicate that, with increasing height to breadth ratio of the entrance, the separation efficiency first rises and then drops, getting maximal for a ratio a/b = 8; while, with the straight section＇s increasing height, it first drops and then rises, arriving at a minimum at h = 2.3 D. On the other hand, the separator＇ s flow resistance rises with increasing height to breadth ratio at entrance and drops with decreasing height of the straight section; the optimal values being respectively a/b = 8 and h = 1.8 D; the corresponding pressure drop being 1.22 kPa. Figs 9, table 1 and refs 10.

关 键 词：动力工程机械 方形气/固分离器 性能 入口高宽比 直段高度 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]