FIELD: engines and pumps.
SUBSTANCE: gas-turbine engine comprises a fan section, a gear train for driving the fan section, a compressor section and a turbine section. Compressor section comprises a low-pressure compressor section and a high-pressure compressor section. Turbine section is designed to drive the compressor section and the gear train. Total pressure coefficient, which is provided by the combination of a pressure coefficient in the said low-pressure compressor section and a pressure coefficient in the said high-pressure compressor section is greater than approximately 35. Pressure coefficient in the low-pressure compressor section is from approximately 3 up to approximately 8, wherein the pressure coefficient in the high-pressure compressor section is from approximately 7 up to approximately 15.
EFFECT: provided are fuel savings by 2 % and simplicity of the design due to a more favorable distribution of pressure increase degrees between the hotter high pressure loops and cooler loops of low pressure.
11 cl, 5 dwg
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