Double Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure GradientSource: Journal of Engineering for Gas Turbines and Power:;2019:;volume( 141 ):;issue: 003::page 31015Author:Ligrani, Phil
,
Ren, Zhong
,
Vanga, Sneha Reddy
,
Allgaier, Christopher
,
Liberatore, Federico
,
Patel, Rajeshriben
,
Srinivasan, Ram
,
Ho, Yin-Hsiang
DOI: 10.1115/1.4041451Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experimentally measured results are presented for different experimental conditions for a test plate with double wall cooling, composed of full-coverage effusion-cooling on the hot side of the plate, and cross-flow cooling on the cold side of the plate. The results presented are different from those from past investigations, because of the addition of a significant mainstream pressure gradient. Main stream flow is provided along a passage with a contraction ratio of 4, given by the ratio upstream flow area, to downstream flow area. With this arrangement, local blowing ratio decreases significantly with streamwise development along the test section, for every value of initial blowing ratio considered, where this initial value is determined at the most upstream row of effusion holes. Experimental data are given for a sparse effusion hole array. The experimental results are provided for mainstream Reynolds numbers of 92,400–96,600, and from 128,400 to 135,000, and initial blowing ratios of 3.3–3.6, 4.4, 5.2, 6.1–6.3, and 7.3–7.4. Results illustrate the effects of blowing ratio for the hot side and the cold side of the effusion plate. Of particular interest are values of line-averaged film cooling effectiveness and line-averaged heat transfer coefficient, which are generally different for contraction ratio of 4, compared to a contraction ratio of 1, because of different amounts and concentrations of effusion coolant near the test surface. In regard to cold-side measurements on the crossflow side of the effusion plate, line-averaged Nusselt numbers for contraction ratio 4 are often less than values for contraction ratio 1, when compared at the same main flow Reynolds number, initial blowing ratio, and streamwise location.
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contributor author | Ligrani, Phil | |
contributor author | Ren, Zhong | |
contributor author | Vanga, Sneha Reddy | |
contributor author | Allgaier, Christopher | |
contributor author | Liberatore, Federico | |
contributor author | Patel, Rajeshriben | |
contributor author | Srinivasan, Ram | |
contributor author | Ho, Yin-Hsiang | |
date accessioned | 2019-03-17T10:16:38Z | |
date available | 2019-03-17T10:16:38Z | |
date copyright | 10/4/2018 12:00:00 AM | |
date issued | 2019 | |
identifier issn | 0742-4795 | |
identifier other | gtp_141_03_031015.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4256041 | |
description abstract | Experimentally measured results are presented for different experimental conditions for a test plate with double wall cooling, composed of full-coverage effusion-cooling on the hot side of the plate, and cross-flow cooling on the cold side of the plate. The results presented are different from those from past investigations, because of the addition of a significant mainstream pressure gradient. Main stream flow is provided along a passage with a contraction ratio of 4, given by the ratio upstream flow area, to downstream flow area. With this arrangement, local blowing ratio decreases significantly with streamwise development along the test section, for every value of initial blowing ratio considered, where this initial value is determined at the most upstream row of effusion holes. Experimental data are given for a sparse effusion hole array. The experimental results are provided for mainstream Reynolds numbers of 92,400–96,600, and from 128,400 to 135,000, and initial blowing ratios of 3.3–3.6, 4.4, 5.2, 6.1–6.3, and 7.3–7.4. Results illustrate the effects of blowing ratio for the hot side and the cold side of the effusion plate. Of particular interest are values of line-averaged film cooling effectiveness and line-averaged heat transfer coefficient, which are generally different for contraction ratio of 4, compared to a contraction ratio of 1, because of different amounts and concentrations of effusion coolant near the test surface. In regard to cold-side measurements on the crossflow side of the effusion plate, line-averaged Nusselt numbers for contraction ratio 4 are often less than values for contraction ratio 1, when compared at the same main flow Reynolds number, initial blowing ratio, and streamwise location. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Double Wall Cooling of a Full Coverage Effusion Plate With Cross Flow Supply Cooling and Main Flow Pressure Gradient | |
type | Journal Paper | |
journal volume | 141 | |
journal issue | 3 | |
journal title | Journal of Engineering for Gas Turbines and Power | |
identifier doi | 10.1115/1.4041451 | |
journal fristpage | 31015 | |
journal lastpage | 031015-11 | |
tree | Journal of Engineering for Gas Turbines and Power:;2019:;volume( 141 ):;issue: 003 | |
contenttype | Fulltext |