弯管分离器的数值模拟与设计优化  

Numerical Simulation and optimum design of elbow pipe separator

作　　者：罗家松[1] 李森[1] 魏小林[1] 

机构地区：[1]中国科学院力学研究所,北京100190

出　　处：《锅炉制造》2009年第6期7-12,共6页Boiler Manufacturing

基　　金：国家高技术研究发展计划(863计划)(No.2006AA05Z253)

摘　　要：为了优化设计转炉烟道中弯管分离器结构,利用计算流体力学软件Fluent,对弯管分离器中的气-固两相流进行了数值模拟。采用正交实验工况设计方法、级差分析法和方差分析法,研究了弯管转折角、分离器进出口当量直径比、斯托克斯数等5个因素对于分离效率和压力损失系数的影响。研究表明:5个因素中,斯托克斯数对分离效率有特别显著影响,斯托克斯数越大,分离效率越高。进出口当量直径比对压力损失系数有显著影响,弯管转折角对压力损失系数有一定影响。进出口当量直径比越小,弯管转折角越小,压力损失系数就越小。在模拟结果的基础上,得到了关于分离效率和压力损失系数计算公式。In order to optimize the structure of elbow pipe separator in converter flue, gas - solid two - phase flow in the separator was simulated by CFD software Fluent. Based on orthogonal experiment design, rank difference analysis and variance analysis, the influences of five variables such as elbow angle, equivalent diameter of inlet and outlet, Stokes number on the separation efficiency and pressure loss coefficient were investigated. Simulated results indicated that： Stokes number has a significant impact on separation efficiency, the larger the Stokes number, the higher the separator efficiency. Ratio of equivalent diameter of inlet and outlet has a significant impact on pressure loss coefficient, and the elbow angle has a little impact on pressure loss coefficient, the smaller the ratio of equivalent diameter of inlet and outlet and the smaller the elbow angle, the smaller the pressure loss coefficient. Based on simulated results, the calculation formulas of separation efficiency and pressure loss coefficient were drawn.

关 键 词：分离效率 压力损失系数 优化设计 弯管分离器 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]