In this paper, the gas-side fluid flow distribution inside a bayonet tube heat exchanger with inner and outer fins is numerically studied. The heat exchanger is designed based on the traditional bayonet tube heat exchanger, where compact continuous plain fins and wavelike fins are mounted on the outside and inside surfaces of outer tubes, respectively, to enhance the heat transfer performance. However, gross flow maldistribution and large vortices are observed in the gas-side flow channel of baseline design. In order to improve the flow uniformity, three modified designs are proposed. Three vertical plates and two inclined plates are mounted on the inlet manifold for Model B. For the Model C, another six bending plates are mounted on the middle manifolds and three pairs of them are connected together. The Model D has a similar structure as Model C except for the two additional baffles. The results indicate that the flow distributions of Models C and D are much more uniform under different inlet Reynolds number, especially in the high inlet Reynolds number. Although the flow distribution of Model D is the best, its pressure drop is 2.6 times higher than that of Model C. Therefore, the design of Model C is the most optimized structure. Compared with the original design, the nonuniformity of Model C can be reduced by 42% while the pressure drop is almost the same under the baseline condition.
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e-mail: wangqw@mail.xjtu.edu.cn
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December 2011
Research Papers
CFD Optimization of Gas-Side Flow Channel Configuration Inside a High Temperature Bayonet Tube Heat Exchanger With Inner and Outer fins
Ting Ma,
Ting Ma
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
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Min Zeng,
Min Zeng
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
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Yanpeng Ji,
Yanpeng Ji
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
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Qiuwang Wang
Qiuwang Wang
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
e-mail: wangqw@mail.xjtu.edu.cn
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
Search for other works by this author on:
Ting Ma
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
Min Zeng
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
Yanpeng Ji
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
Qiuwang Wang
Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education,
Xi’an Jiaotong University,
Xi’an, Shaanxi, 710049, China
e-mail: wangqw@mail.xjtu.edu.cn
J. Eng. Gas Turbines Power. Dec 2011, 133(12): 122301 (9 pages)
Published Online: September 1, 2011
Article history
Received:
April 10, 2011
Accepted:
April 11, 2011
Online:
September 1, 2011
Published:
September 1, 2011
Citation
Ma , T., Zeng , M., Ji, Y., and Wang, Q. (September 1, 2011). "CFD Optimization of Gas-Side Flow Channel Configuration Inside a High Temperature Bayonet Tube Heat Exchanger With Inner and Outer fins." ASME. J. Eng. Gas Turbines Power. December 2011; 133(12): 122301. https://doi.org/10.1115/1.4004014
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