The Influence of Large-Scale High-Intensity Turbulence on Vane Heat Transfer

[+] Author and Article Information
F. E. Ames

Allison Engine Company, Indianapolis, IN 46206

J. Turbomach 119(1), 23-30 (Jan 01, 1997) (8 pages) doi:10.1115/1.2841007 History: Received February 03, 1995; Online January 29, 2008


An experimental research program was undertaken to examine the influence of large-scale high-intensity turbulence on vane heat transfer. The experiment was conducted in a four-vane linear cascade at exit Reynolds numbers of 500,000 and 800,000 based on chord length. Heat transfer measurements were made for four inlet turbulence conditions including a low turbulence case (Tu ≅ 1 percent), a grid turbulence case (Tu ≅ 7.5 percent), and two levels of large-scale turbulence generated with a mock combustor at two upstream locations (Tu ≅ 12 percent and 8 percent). The heat transfer data demonstrated that the length scale, Lu, has a significant effect on stagnation region and pressure surface heat transfer.

Copyright © 1997 by The American Society of Mechanical Engineers
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