偏心方圆节扩散管数值模拟  

Numerical simulation of the tangent circular-to-rectangular transition duct

作　　者：曹洪振[1] 祁金胜[1] 袁宝强[2] 杜文静[2] 王湛[2] CAO Hongzhen;QI Jinsheng;YUAN Baoqiang;DU Wenjing;WANG Zhan(Shandong Electric Power Engineering Consulting Institute Corporation,Jinan 250013,Shandong,China;School of Energy and Power Engineering,Shandong University,Jinan 250061,Shandong,China)

机构地区：[1]山东电力工程咨询院有限公司,山东济南250013 [2]山东大学能源与动力工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2020年第5期77-82,89,共7页Journal of Shandong University（Engineering Science）

摘　　要：采用ANSYS Fluent对底部相切的偏心方圆节扩散管进行数值模拟。试验数据验证数值模型的准确性。比较同心方圆节与偏心方圆节流场的差异,探究扩散管长度对流场的影响,通过添加导向板对高扩散角的偏心方圆节进行优化。模拟结果表明,偏心方圆节扩散管长度与烟道总压降和流场均匀性呈非线性关系,增大扩散管长可降低局部损失。高扩散角的偏心方圆节添加导向板可降低管道局部损失,提高流场均匀性。ANSYS Fluent was used to simulate the circular-to-rectangular transition duct.The accuracy of the numerical model was verified by experimental data.The difference between the concentric and tangent CRD(circular to rectangular duct)was compared,then the influence of the diffusion tube length on the flow field was explored,and the tangent CRD with high diffusion angle was optimized by adding deflectors.The simulation results showed that the length(diffusion angle)had a nonlinear relationship with the total pressure drop of the flue and the uniformity of the flow field.For tangent CRD with high diffusion angle,adding deflectors was more effectual to reduce local loss of the pipeline and improve the uniformity of the flow field.

关 键 词：偏心方圆节 扩散管 流场均匀性 阻力 数值模拟 

分 类 号：TB126[理学—工程力学]