Title

Prediction Of Adiabatic Effectiveness Of Various Cratered Film Hole Configurations: Sensitivity Analysis For The Rectangle Shaped Mask

Abstract

Over the past few years, trench film cooling has taken a massive leap in the film cooling technology by helping the coolant flow spread out to cover more down-stream area. This advancement improved the performance of film cooling in terms of effectiveness. However, there are instances in which a trench cannot be employed due to the repairing and refurbishing process of the thermal barrier coating (TBC). In these cases, crater film cooling is used. The effectiveness of crater film cooling is not as adequate as the trench film cooling, but it is a far better method than basic film cooling method as shown in previous study. Crater film cooling method (or so-called masked film cooling hole) is a noncontinuous type of traverse slot film cooling. There are several geometrical masks that have been employed in gas turbines, which will be investigated in a series of studies. However, for the current work, only rectangular masks will be considered. Basic sensitivity analysis will be conducted to find out the optimum combination of geometrical parameters conjugated with the flow conditions that will provide the maximum spatially averaged film cooling effectiveness and to determine the uniformity of the temperature distribution on downstream area of a flat plate. Since the above topic is the primary purpose of this particular study, a cylindrical coolant pipe will be employed in this work for simplicity purposes. A numerical model is used to analyze the geometric variation and the results are compared to data from literature. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

Publication Date

12-13-2010

Publication Title

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

78649870225 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/78649870225

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