Optimum trailing edge ejection for cooled gas turbine blades
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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. Comprehensive theoretical and experimental investigations show that for the ejection velocity ratio μ = Vc/V2 = 1, the trailing edge ejection reduces the mixing losses downstream of the cooled gas turbine blade. For given cooling mass flow ratios, optimum slot-width/trailing edge ratios are found, which correspond to the minimum mixing loss coefficients.
author list (cited authors)
Schobeiri, M. T., & Pappu, K.