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A Numerical Study on the Effects of Flow and Heat Transfer in a Rectangular Passage with Vertical Column Turbulence(PDF)

南京师范大学学报（工程技术版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2005年02期
Page:
27-30
Research Field:
Publishing date:

Info

Title:
A Numerical Study on the Effects of Flow and Heat Transfer in a Rectangular Passage with Vertical Column Turbulence
Author(s):
WANG Fengming;  ZHANG Jingzhou;  WANG Suofang
School of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Jiangsu Nanjing 210016, China
Keywords:
enhanced heat transfer;  pressure loss;  w ater drop-shaped co lum n;  num er ica l calcu lation
PACS:
TK124
DOI:
-
Abstract:
FLUENT-CFD So ftwa re is used to sim ulate the flow and heat transfe r in a rectangular passag ew ith the arrays of c irc le- shaped, sim ilar-drop-shaped, e lliptic- shaped and wa ter drop-shaped columns. The ve lo city fields, pressure fie lds, temperature fie lds and the lo ca l convective hea t transfer coeffic ients are ob tained and the enhancem ent o f heat transfer and the pressure loss cha racte ristics a re com pared. The ca lcu la ted results show that the pressure lo ss o f drop- shaped columns is 66. 3%, 70. 5% and 79. 8% com pa red w ith the fo rme r three w hile the av erage heat transfer coe fficien t on the un iform hea t flux endw a ll decreases 18. 5%, 12. 4% and 3. 8%, respec tive ly. The reduced range of the pressure loss is ev idently higher than the weaken ing o f the enhance hea t transfer. So that thew ater drop- shaped co lumn array is a prom ising con figura tion w ith a comprehens ive properties and can replace the norm a l c irc le- shaped co lumn.

References:

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Last Update: 2013-04-29