Journal of Shandong University(Engineering Science) ›› 2021, Vol. 51 ›› Issue (4): 106-110.doi: 10.6040/j.issn.1672-3961.0.2020.306

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Flow characteristics of dual inner-tube chimney in thermal power plant

LI Xu1, AN Chunguo1, WANG Zhaoyang1, WANG Zhan2, JI Wanxiang3*   

  1. 1. Shandong Electric Power Engineering Consulting Institute Co., Ltd., Jinan 250013, Shandong, China;
    2. School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China;
    3. Institute of Thermal Science and Technology, Shandong University, Jinan 250061, Shandong, China
  • Published:2021-08-18

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Abstract: Computational fluid dynamics method was used to analyze the flow characteristics of conventional chimney, including the distribution of flow dead zone, the distribution of pressure drop, and the influence of cross-sectional area and side area on flow resistance. According to the large pressure drop in semicircular inner tube, a kind of superior arcuate inner tube was proposed, which could effectively combine the advantages of circular tube and semi-circular tube, and had the characteristics of compact structure, small cross-sectional area and low flow pressure. The results showed that, under the same cross-sectional area, the pressure drop of the superior arcuate tube was smaller than that of the semicircular tube, and slightly larger than that of the circular tube. In order to ensure the same pressure drop as the circular tube, the cross-sectional area of the semicircular tube was increased by about 5%, while the superior arcuate tube should be increased by about 3%. The results provided a reference for the design of the inner tube of power plant chimney.

Key words: thermal power plant, dual inner-tube chimney, superior arcuate, flow property, pressure drop

CLC Number: 

  • TB126
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