Journal of Shandong University(Engineering Science) ›› 2020, Vol. 50 ›› Issue (5): 77-82.doi: 10.6040/j.issn.1672-3961.0.2020.169

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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

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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.

Key words: tangent circular-to-rectangular transition duct, diffusion tube, flow field uniformity, resistance, numerical simulation

CLC Number: 

  • TB126
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