Title page for ETD etd-02232008-152904

Type of Document

Master's Thesis

Author

Hatchett, John Henry

URN

etd-02232008-152904

Title

An Investigation of Effectiveness of Normal and Angled Slot Film Cooling in a Transonic Wind Tunnel

Degree

Master of Science

Department

Mechanical Engineering

Advisory Committee

Advisor Name	Title
Ng, Fai	Committee Chair
Thole, Karen A.	Committee Co-Chair
Diller, Thomas E.	Committee Member

Keywords

film cooling
transonic turbine
normal and angled slots

Date of Defense

2008-02-22

Availability

unrestricted

Abstract

An experimental and numerical investigation was conducted to determine the film cooling effectiveness of a normal slot and angled slot under realistic engine Mach number conditions. Freestream Mach numbers of 0.65 and 1.3 were tested. For the normal slot, hot gas ingestion into the slot was observed at low blowing ratios (M < 0.25). At high blowing ratios (M > 0.6) the cooling film was observed to “lift off” from the surface.

For the 30o angled slot, the data was found to collapse using the blowing ratio as a scaling parameter (x/Ms). Results from the current experiment were compared with the subsonic data published to confirm this test procedure. For the angled slot, at the supersonic freestream Mach number, the current experiment shows that at the same x/Ms, the film cooling effectiveness increases by as much as 25% as compared to the subsonic case.

The results of the experiment also show that at the same x/Ms, the film cooling effectiveness of the angled slot is considerably higher than that of the normal slot, at both subsonic and supersonic Mach numbers. The flow physics for the slot tests considered here are also described with computational fluid dynamic (CFD) simulations in the subsonic and supersonic regimes.

Files

Filename		Size	Approximate Download Time (Hours:Minutes:Seconds)
Filename		Size	28.8 Modem	56K Modem	ISDN (64 Kb)	ISDN (128 Kb)	Higher-speed Access
	Hatchett_Thesis.pdf	634.62 Kb	00:02:56	00:01:30	00:01:19	00:00:39	00:00:03