Flow Transition Phenomena and Heat Transfer Over the Pressure Surfaces of Gas Turbine Blades

[+] Author and Article Information
A. Brown, B. W. Martin

Department of Mechanical Engineering and Engineering Production, University of Wales Institute of Science and Technology, Cardiff, Wales

J. Eng. Power 104(2), 360-367 (Apr 01, 1982) (8 pages) doi:10.1115/1.3227287 History: Received December 11, 1980; Online September 28, 2009


Detailed examination of flow measurements over concave pressure surfaces suggests that interaction of Taylor-Goertler vorticity with mainstream turbulence exerts only limited influence in enhancing laminar boundary-layer heat transfer. While transition is primarily controlled by the Launder laminarisation criterion, the Goertler number at which it subsequently occurs is not solely determined by turbulence intensity. Adoption of K≥2.5.10 – 6 as a design criterion for the pressure surfaces of turbine blades would appear to have significant advantages in terms of reduced heat transfer, increased lift, and lower aerodynamic drag.

Copyright © 1982 by ASME
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