ガスタービン蒸気冷却翼の研究

概要

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This paper presents an analytical method for computing the cooling performance and pressure loss in internal convective steam-cooling gas turbine blades of return flow type. Experimental results of steam-heating, steam-cooling, and air-cooling cascade tests carried out with a model blade so as to examine the validity of the calculation method are also given. Comparison is made in terms of the average blade temperature at mid span and the steam temperature at outlet of the cooling passage with cooling-flow rate, Reynolds number, and temperature at outlet of the cooling passage with cooling-flow rate, Reynolds number, and temperature ratio as the variables. It is shown that the cooling performance can be predicted with a good accuracy. Finally, cooling characteristics and pressure loss characteristics of steam are shown in comparison with air under an engine operating condition.
一般社団法人日本機械学会の論文
1986-08-25