Accession Number:

AD0745575

Title:

An Experimental Investigation of the Effects of Massive Film Cooling on the Aerodynamics of a Turbine Airfoil

Descriptive Note:

Final rept. 1 Aug 1968-31 Jan 1970

Corporate Author:

OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS

Personal Author(s):

• Hartsel, James E.

Report Date:

1970-08-01

Pagination or Media Count:

176.0

Abstract:

The effects of massive film cooling through multiple rows of discrete holes on the aerodynamics of a typical two-dimensional turbine airfoil have been studied experimentally using a single blade positioned in a contoured channel. The channel walls, shaped to simulate the presence of adjacent airfoils in a cascade, were both porous and movable to allow adjustment of the flow direction and airfoil surface pressure. Electrically heated air was used as the primary flow, while room temperature coolant air was emitted from five rows of discrete holes on each airfoil surface to film cool the regions aft of mid-chord. Hole geometries angled in the spanwise, chordwise, and vertical directions were employed to achieve coolant-to-inlet mass rate ratios as high as 0.05 for blowing from the single blade.

Descriptors:

• *GAS TURBINE BLADES
• *FILM COOLING
• HEAT TRANSFER
• MATHEMATICAL MODELS
• EXPERIMENTAL DATA
• AIR COOLED
• ORIFICES
• AIRFOILS
• FLOW FIELDS
• WAKE

Subject Categories:

• Air Conditioning, Heating, Lighting and Ventilating
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE