Influence of Flowing Impact Angle Heat Transfer in Fluid Flowing Across Tube Bundles
[1]DONG Qiwu,WANG Ye,LIU Minshan.Influence of Flowing Impact Angle Heat Transfer in Fluid Flowing Across Tube Bundles[J].Journal of Zhengzhou University (Engineering Science),2010,31(02):0-.
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
31
Number of periods:
2010 No.02
Page number:
0-
Column:
Public date:
2010-02-02
- Title:
- Influence of Flowing Impact Angle Heat Transfer in Fluid Flowing Across Tube Bundles
- CLC:
- -
- DOI:
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- Abstract:
- Three—dimentional numerical simulation on heat transfer in fluid flowing across tube bundles iscarried out by using the computational fluid dynamics software FLUENT，while the totle tube bundles are 87 intubes staggered arrangement with the specific flowing impact angles of 45°，60°，75°and 90°．The longitudinaland transverse tube pitch is 9．5 mm and 1 1 mm，respectively．The numerical simulation results of the averageheat transfer Nusseh number and the pressure drop from the inlet to outlet of models are investigated and com—pared with)Kykayckac’S experimental correlation．With the Reynolds numbers from 5 000 to 20 000 in thispaper，the fitting formula of the average heat transfer Nusseh number is given for different impact angles．Thelocal heat transfer character in the circumferential direction along tube walls is also analyzed in detail．Itshowed that，the turbulent boundary layer separates from tube walls when the circumferential angle is about105 °，when the heat transfer coefficient is the lowest；the average heat transfer Nusseh number and pressuredrop become bigger as the flowing impact angles increase．The comprehensive heat transfer performance ismuch better when the flowing impact angle is 45°
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Last Update:
1900-01-01
