Keywords
Gas turbine, heat transfer, film cooling
Abstract
This thesis is an experimental and numerical full-coverage film cooling study. The objective of this work is the quantification of local heat transfer augmentation and adiabatic film cooling effectiveness for two full-coverage film cooling geometries. Experimental data was acquired with a scientific grade CCD camera, where images are taken over the heat transfer surface, which is painted with a temperature sensitive paint. The CFD component of this study served to evaluate how well the v2-f turbulence model predicted film cooling effectiveness throughout the array, as compared with experimental data. The two staggered arrays tested are different from one another through a compound angle shift after 12 rows of holes. The compound angle shifts from ?=-45° to ?=+45° at row 13. Each geometry had 22 rows of cylindrical film cooling holes with identical axial and lateral spacing (X/D=P/D=23). Levels of laterally averaged film cooling effectiveness for the superior geometry approach 0.20, where the compound angle shift causes a decrease in film cooling effectiveness. Levels of heat transfer augmentation maintain values of nearly h/h0=1.2. There is no effect of compound angle shift on heat transfer augmentation observed. The CFD results are used to investigate the detrimental effect of the compound angle shift, while the SST k-? turbulence model shows to provide the best agreement with experimental results.
Notes
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Graduation Date
2015
Semester
Spring
Advisor
Kapat, Jayanta S.
Degree
Master of Science in Mechanical Engineering (M.S.M.E.)
College
College of Engineering and Computer Science
Department
Mechanical and Aerospace Engineering
Degree Program
Mechanical Engineering; Thermo-Fluids
Format
application/pdf
Identifier
CFE0005626
URL
http://purl.fcla.edu/fcla/etd/CFE0005626
Language
English
Release Date
May 2015
Length of Campus-only Access
None
Access Status
Masters Thesis (Open Access)
STARS Citation
Hodges, Justin, "A Full Coverage Film Cooling Study: The Effect of an Alternating Compound Angle" (2015). Electronic Theses and Dissertations. 1133.
https://stars.library.ucf.edu/etd/1133