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Technical Brief

Conjugate Heat Transfer Characteristics of a Highly Thermal-Loaded Film Cooling System in Hot and Multicomposition Gas Condition

[+] Author and Article Information
Mingfei Li

Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China
e-mail: li-mf10@mails.tsinghua.edu.cn

Hong Yin, Jing Ren, Hongde Jiang

Department of Thermal Engineering,
Tsinghua University,
Beijing 100084, China

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received August 11, 2014; final manuscript received June 27, 2015; published online September 10, 2015. Assoc. Editor: Zhuomin Zhang.

J. Heat Transfer 138(2), 024503 (Sep 10, 2015) (5 pages) Paper No: HT-14-1522; doi: 10.1115/1.4031172 History: Received August 11, 2014; Revised June 27, 2015

Radiation would be more important in turbine heat transfer due to higher temperature and multicomposition gas conditions in the future. The main goal of the current study is analyzing the characteristics of conjugate heat transfer considering radiation heat transfer, multicomposition gas, either with or without TBC coated. Both experimental and numerical studies were carried out. By comparing the experimental and the numerical results, it was concluded that the implemented thermal conduction/convection/radiation simulation method is valid for the cases studied. The results have shown that higher percentage of steam in the gas composition leads to higher temperature (lower normalized temperature) on the plate. With the percentage of steam in the hot gas increasing per 7%, the normalized temperature on the plate decreases about 0.02. The heat insulation effect of TBC is more obvious when the radiation effects are strong.

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Figures

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Fig. 1

Sketch map of the test rig

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Fig. 2

Sketch map of the test section

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Fig. 3

Domain and mesh for simulation

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Fig. 4

Experiment/simulation temperature results on the centerline of the top and bottom surfaces of the plate: (a) condition 1, (b) condition 2, and (c) condition 3

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Fig. 5

The normalized temperature in different gas composition conditions

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Fig. 6

The temperature distributions on the plate top surface (condition 1)

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Fig. 7

Temperature on the centerline of the test plate surfaces: (a) condition 1, (b) condition 2, and (c) condition 3

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Fig. 8

Temperature decreases by TBC on the centerline of the test plate top surface

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