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### 偏心方圆节扩散管数值模拟

1. 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
• 发布日期:2020-10-19
• 作者简介:曹洪振(1980— ),男,山东济宁人,高级工程师,主要研究方向为火力发电厂热机设备. E-mail:caohongzhen@sdepci.com. *通信作者简介:王湛(1981— ),男,山东济南人,讲师,博士,主要研究方向为电力设备. E-mail:wangzhan@sdu.edu.cn

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

CAO Hongzhen1, QI Jinsheng1, YUAN Baoqiang2, DU Wenjing2, WANG Zhan2*

1. 1. Shandong Electric Power Engineering Consulting Institute Corporation, Jinan 250013, Shandong, China;
2. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China
• Published:2020-10-19

Abstract: 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.

• TB126
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