Abstract
Models of gas-turbine blades with transpiration cooling are considered; the cooling system is made of sintered stainless steel fibers. Calorimetry in a liquid-metal thermostat is used for thermal tests of the models. A method of thermal calculation is developed for the models; the method takes account of the porosity of the material. On that basis, dimensionless equations are obtained for four different blade designs. Increase in the number of channels ensures more uniform distribution of the air temperature in the blade cross section. As a result, the relative heat-transfer intensity \(\overline {\text{Nu}} \) increases with increase in area of the heat-transfer surface. Transpiration cooling increases the permissible gas temperature at the turbine input to 2200 K, with consequent increase in the life and reliability of the gas-turbine engine or gas-turbine system.
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Translated by B. Gilbert
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Vikulin, A.V., Zemlyanaya, V.A. Gas-Turbine Blades with a Sintered Steel Fiber System for Transpiration Cooling: Thermal Analysis. Russ. Engin. Res. 43, 479–483 (2023). https://doi.org/10.3103/S1068798X23050246
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DOI: https://doi.org/10.3103/S1068798X23050246