TED-AJ03-257 Augmented Heat Transfer in Counterflow Heat Exchangers with Helical Turbulators
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概要
- 論文の詳細を見る
A 3-D mathematical model has been developed to investigate the heat transfer augmentation in a circular tube with a helical turbulator. Glycol-water blends of various concentrations were used in the inner tube, and pure water was used in the outer tube. Changes in fluid physical properties with temperature were taken into account, and k-ε, k-ω, and large eddy models were utilized for turbulence modeling. The simulation results showed a non-linear variation in Reynolds and Prandtl numbers for a long model of a heat exchanger even in the absence of a turbulator. The presence of the turbulator was found to increase the heat transfer, sometimes without inducing turbulence, but also increased the pressure drop. The results demonstrate that the model could be used as a useful tool for optimization of heat exchanger performance in the presence of a turbulator. Preliminary comparisons with experimental data showed reasonable agreement.
- 一般社団法人日本機械学会の論文
著者
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Viljanen Marja
Laboratory Of Computational Fluid Dynamics Lappeenranta University Of Technology
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Makiharju Simo
Laboratory of Computational Fluid Dynamics, Lappeenranta University of Technology
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Polashenski William
Lomic Inc.
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Hajiloo Azardocht
John Zink Company LLC, 11920 East Apache
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Zamankhan Piroz
Laboratory of Computational Fluid Dynamics, Lappeenranta University of Technology
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Lankinen Raija
Department of Energy and Environmental Technology, Lappeenranta University of Technology
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Makiharju Simo
Laboratory Of Computational Fluid Dynamics Lappeenranta University Of Technology
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Lankinen Raija
Department Of Energy And Environmental Technology Lappeenranta University Of Technology
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Zamankhan Piroz
Laboratory Of Computational Fluid Dynamics Lappeenranta University Of Technology
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Hajiloo Azardocht
John Zink Company Llc 11920 East Apache