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Research Papers

An Experimental Investigation on Transpiration Cooling Based on the Multilaminated Sintered Woven Wire Mesh Structures

[+] Author and Article Information
Jiandong Ma, Xiang Luo

National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
Collaborative Innovation Center of Advanced
Aero-Engine,
Beihang University,
Beijing 100191, China

Haiwang Li

National Key Laboratory of Science
and Technology on Aero-Engine
Aero-Thermodynamics,
Collaborative Innovation Center of Advanced
Aero-Engine,
Beihang University,
Beijing 100191, China
e-mail: 09620@buaa.edu.cn

Yangpeng Liu

National Key Laboratory of Science and
Technology on Aero-Engine
Aero-Thermodynamics,
Collaborative Innovation Center of Advanced
Aero-Engine,
Beihang University,
Beijing 100191, China

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received July 10, 2015; final manuscript received November 25, 2015; published online April 12, 2016. Assoc. Editor: Giulio Lorenzini.

J. Thermal Sci. Eng. Appl 8(3), 031005 (Apr 12, 2016) (9 pages) Paper No: TSEA-15-1184; doi: 10.1115/1.4032921 History: Received July 10, 2015; Revised November 25, 2015

This paper experimentally investigated a transpiration cooling performance of double-laminated and triple-laminated sintered woven wire mesh structures with different porosities and arrangements. Each laminated test piece was made up of two or three layers, and each layer has different porosities and same thickness. The porosities of layers include 25.6%, 37.1%, 46.9%, and 55.1%. All the tests were performed with air. The flow rate and temperature of main flow were kept at 300 kg/hr and 90 °C, respectively. The blowing ratio between the cooling air and main flow approximately varied from 1.2% to 9%. The average surface temperature of test pieces was captured by an infrared thermal imager. The cooling effectiveness for each specimen was calculated and analyzed. Moreover, the pressure drop of several specimens was analyzed with modified Darcy equation. The results showed that the flow behavior agrees well with the modified Darcy equation. The average porosity of the test piece has a great influence on flow behavior, and the air flow direction through a double-laminated porous medium has only slight influence on pressure drop in this study. The results also indicated that the cooling efficiency increases as the average porosity increases. The arrangement of layers affects the transpiration cooling performance, and the cooling efficiency of the laminated model is affected by each laminates together.

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References

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Figures

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Fig. 1

Schematic diagram of the experimental device

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Fig. 2

The experimental principle diagram and locations of lines

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Fig. 3

Weaving way and structure amplification of dutch weave

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Fig. 4

The comparison of cooling efficiency for different specimens with porosity of x% + 55.1% and x% + 46.9%

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Fig. 5

Cooling efficiency of specimens with porosity of 55.1% + x% and 46.9% + x%

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Fig. 6

(a)–(e) Cooling efficiency comparison of specimens with same porosity composition, and (f) pressure drops of three porosity combinations

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Fig. 7

Dimension figure of triple-laminated test piece

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Fig. 8

Cooling performance comparison of double-laminated and triple-laminated specimens

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Fig. 9

The fitted out Darcy–Forchheimer equation curves

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Fig. 10

Wall temperature distribution of porosity composition 25.6% + 55.1%

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Fig. 11

Wall temperature distribution of porosity composition 37.1% + 55.1%

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Fig. 12

Wall temperature distribution of porosity composition 46.9% + 55.1%

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Fig. 13

Wall temperature distribution of porosity composition 55.1% + 37.1% + 55.1%

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Fig. 14

Temperature variations along lines: (a) line aa—porosity composition x% + 55.1% F  ≈  3.6%, and Tg  ≈ 90 °C and(b) line aa—triple-specimen, different blowing ratios

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Fig. 15

Temperature variations along lines (bb, cc, and dd): triple-laminated specimen, F = 4.38%

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