Turbine blades with highly efficient cooling
One of the key ways to reduce the specific fuel consumption of a gas turbine engine (GTE) is to increase the efficiency of the thermodynamic cycle, achieved by increasing the total compression ratio in the compressor and the gas temperature in front of the turbine. As the gas temperature in front of the turbine increases, it is necessary to increase the cooling air flow rate, which inevitably leads to a decrease in the coefficient of performance (efficiency) of the turbine due to increased pumping losses, blowing losses, film formation, and leaks in turbine elements. At the same time, an increase in cooling air flow and a decrease in efficiency also leads to an increase in the gas temperature in front of the turbine. To ensure the required efficiency, turbines with highly efficient blade cooling are used, the design of which uses new materials and coatings.
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