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Research Papers

Double Wall Cooling of an Effusion Plate With Simultaneous Cross Flow and Impingement Jet Array Internal Cooling

[+] Author and Article Information
David Ritchie, Austin Click

Department of Mechanical and
Aerospace Engineering,
Propulsion Research Center,
University of Alabama in Huntsville,
5000 Technology Drive,
Olin B. King Technology Hall,
Huntsville, AL 35899

Phillip M. Ligrani

Professor
Department of Mechanical and
Aerospace Engineering,
Propulsion Research Center,
University of Alabama in Huntsville,
5000 Technology Drive,
Olin B. King Technology Hall S236,
Huntsville, AL 35899
e-mail: pml0006@uah.edu

Federico Liberatore, Rajeshriben Patel, Yin-Hsiang Ho

Combustion Engineering,
Solar Turbines Incorporated,
2200 Pacific Highway, Mail Zone E-4,
San Diego, CA 92186-5376

Manuscript received January 24, 2019; final manuscript received May 3, 2019; published online June 5, 2019. Assoc. Editor: Riccardo Da Soghe.

J. Eng. Gas Turbines Power 141(9), 091008 (Jun 05, 2019) (11 pages) Paper No: GTP-19-1032; doi: 10.1115/1.4043694 History: Received January 24, 2019; Revised May 03, 2019

Considered is double wall cooling, with full-coverage effusion-cooling on the hot side of the effusion plate, and a combination of impingement cooling and cross flow cooling, employed together on the cold side of the effusion plate. Data are given for a main stream flow passage with a contraction ratio (CR) of 4 for main stream Reynolds numbers Rems and Rems,avg of 157,000–161,000 and 233,000–244,000, respectively. Hot-side measurements (on the main stream flow or hot side of the effusion plate) are presented, which are measured using infrared thermography. Using a transient thermal measurement approach, measured are spatially resolved distributions of surface adiabatic film cooling effectiveness, and surface heat transfer coefficient. For the same Reynolds number, initial blowing ratio (BR), and streamwise location, increased thermal protection is often provided when the effusion coolant is provided by the cross flow/impingement combination configuration, compared to the cross flow only supply arrangement. In general, higher adiabatic effectiveness values are provided by the impingement only arrangement, relative to the impingement/cross flow combination configuration, when compared at the same Reynolds number, initial BR, and x/de location. Data for one streamwise location of x/de = 60 show that the highest net heat flux reduction line-averaged net heat flux reduction (NHFR) values are produced either by the impingement/cross flow combination configuration or by the impingement only arrangement, depending upon the particular magnitude of BR, which is considered.

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References

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Figures

Grahic Jump Location
Fig. 1

(a) Side, cross-sectional view of the test section, including optical instrumentation arrangements, (b) three-dimensional view of double wall cooling configuration, including effusion film cooling, impingement jet array, and cross flow, and (c) overall experimental facility

Grahic Jump Location
Fig. 2

(a) Effusion hole array configuration, with streamwise coordinate, (b) impingement hole array configuration, and (c) relative locations of effusion hole entrances, effusion hole exits, and impingement holes

Grahic Jump Location
Fig. 3

Comparisons of local BR variations for the CR = 4 cross flow/impingement configuration, the CR = 4 cross flow configuration, and the CR = 4 impingement flow configuration for Rems,avg = 128,000–244,000

Grahic Jump Location
Fig. 4

Hot-side surface, local heat transfer coefficient variation for the CR = 4 cross flow/impingement configuration, for BR = 8.3 and Rems,avg = 237,000

Grahic Jump Location
Fig. 5

Hot-side surface, local adiabatic film cooling effectiveness variation for the CR = 4 cross flow/impingement configuration, for BR = 8.3 and Rems,avg = 237,000

Grahic Jump Location
Fig. 6

Comparisons of hot-side local heat transfer coefficient values with streamwise development for the CR = 4 cross flow/impingement configuration, for y/de = 33, for different BRs for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 7

Comparisons of hot-side local adiabatic film cooling effectiveness with streamwise development for the CR = 4 cross flow/impingement configuration, for y/de = 21, for different BRs for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 8

Comparisons of hot-side local heat transfer coefficient values with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data [30], and CR = 4 impingement flow data [31], for y/de = 11 and y/de = 15 for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 9

Comparisons of hot-side local adiabatic film cooling effectiveness with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data [30], and CR = 4 impingement flow data [31], for y/de = 21 for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 10

Hot-side line-averaged heat transfer coefficient andline-averaged adiabatic film cooling effectiveness variations with streamwise development for the CR = 4 crossflow/impingement configuration with BR = 8.3 and Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 11

Comparisons of hot-side line-averaged adiabatic film cooling effectiveness variations with BR for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data [30], and CR = 4 impingement flow data [31], for x/de = 60 and Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 12

Comparisons of hot-side line-averaged heat transfer coefficient variations with BR for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data [30], and CR = 4 impingement flow data [31], for x/de = 60 and Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 13

Comparisons of hot-side line-averaged net heat fluxreduction variations with BR for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data, and CR = 4 impingement flow data, for x/de = 60 and Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 14

Comparisons of hot-side line-averaged heat transfer coefficient values with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 impingement flow data, for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 15

Comparisons of hot-side line-averaged adiabatic film effectiveness values with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 impingement flow data, for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 16

Comparisons of hot-side line-averaged heat transfer coefficient values with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data, for Rems,avg = 233,000–244,000

Grahic Jump Location
Fig. 17

Comparisons of hot-side line-averaged adiabatic film cooling effectiveness values with streamwise development for the CR = 4 cross flow/impingement configuration, with CR = 4 cross flow data, for Rems,avg = 233,000–244,000

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