ライブラリ登録: Guest
Begell Digital Portal Begellデジタルライブラリー 電子書籍 ジャーナル 参考文献と会報 リサーチ集
Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN 印刷: 1065-3090
ISSN オンライン: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v9.i2-3.80
18 pages

EFFECTS OF GAPS BETWEEN THE SIDE-WALLS AND RIBS ON THE RIB-INDUCED FLOW STRUCTURE AND HEAT TRANSFER DISTRIBUTION INSIDE A HIGH ASPECT RATIO COOLING CHANNEL

Robert Kiml
Tokyo University of Agriculture and Technology, Department of Mechanical Systems Engineering, Koganei-shi,Nakacho 2-24-16,Tokyo 184-8588, Japan
Sadanari Mochizuki
Tokyo University of Agriculture and Technology, 2-24-16, Naka-cho, Koganei-shi, Tokyo 184, JAPAN
Akira Murata
Tokyo University of Agriculture and Technology

要約

The flow visualization and heat transfer experiments were performed in a rectangular test section with an aspect ratio of 5:1, representing a cooling channel inside a trailing edge of a gas turbine rotor blade. The experiments were performed for three 60° ribs arrangements: 1) 60° full ribs, 2) 60° ribs with the gaps between the Rear wall and ribs and 3) 60° ribs with gaps between the Front wall and ribs. The obtained results showed strong effects of the rib-induced secondary flow on the heat transfer distribution. It was revealed that the heat transfer enhancement on the Rear and ribbed walls is attributed to the rib-induced secondary flow, which carries the fresh cold air from the passage core region towards the Rear wall and enhances the Nu appreciably. It was also confirmed that while the existence of the gaps between the Front wall and ribs provides more even Nu distribution on the ribbed walls due to the strengthening of the flow structure, in the case of the gaps between tire Rear wall and ribs, it causes a significant mean Nusselt number deterioration on the both ribbed and both smooth walls.


Articles with similar content:

Effects of Rib Height on Heat Transfer Performance Inside a High Aspect Ratio Channel with Inclined Ribs
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 4
Akira Murata, Robert Kiml, Sadanari Mochizuki
The Effects of Gap Position in Discrete Ribs on Local Heat/Mass Transfer in a Square Duct
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 3
Y. Y. Kim, C. K. Choi, Sei Young Lee, Hyung-Hee Cho, Dong-Ho Rhee, S. J. Wu
Numerical Investigation of Impingement Cooling in Ribbed Ducts Due to Jet Arrays
Journal of Enhanced Heat Transfer, Vol.10, 2003, issue 3
Masoud Rokni, Rongguang Jia, Bengt Sunden
Local heat/mass transfer characteristics in a square duct with various rib arrangements
International Heat Transfer Conference 12, Vol.47, 2002, issue
Y. Y. Kim, Chung Choi, Dong Ho Rhee, Sei Young Lee, Hyung-Hee Cho, S. J. Wu
NUMERICAL INVESTIGATION OF TURBULENT HEAT TRANSFER ENHANCEMENT IN A RIBBED CHANNEL WITH UPPER-DOWNSTREAM-SHAPED DEFLECTORS
Journal of Enhanced Heat Transfer, Vol.20, 2013, issue 5
Huiqun Zhou, Bengt Sunden, Yidan Song, Gongnan Xie, Shaofei Zheng