Optimum Trailing Edge Ejection for Cooled Gas Turbine Blades

[+] Author and Article Information
T. Schobeiri

Department of Mechanical Engineering, Turbomachinery Laboratory, Texas A&M University, College Station, TX 77843-3123

J. Turbomach 111(4), 510-514 (Oct 01, 1989) (5 pages) doi:10.1115/1.3262301 History: Received March 01, 1989; Online November 09, 2009


The effect of trailing edge ejection on the flow downstream of a cooled gas turbine blade is investigated. Parameters that affect the mixing losses and therefore the efficiency of cooled blades are the ejection velocity ratio, the cooling mass flow ratio, the slot-width ratio, and the ejection angle. For ejection velocity ratio μ = 1, the trailing edge ejection reduces the mixing losses downstream to the cooled blade. For given cooling mass flow ratios, optimum slot-width/trailing edge ratios are found, which correspond to the minimum mixing loss coefficients.

Copyright © 1989 by ASME
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