Evaluation of economy of three-flow turbojet engine
DOI:
https://doi.org/10.15587/1729-4061.2013.18505Keywords:
three-flow engine, overall efficiency, specific fuel consumptionAbstract
The main tendency of constructing promising engines and their units is using non-conventional schematic and constructive solutions, creating new materials, developing and implementing effective calculation software packages, improving the integration of power plant with aircraft, creating advanced measurement, informational and control systems and equipment.
The paper gives a scheme of a three-flow turbojet engine with turbofan attachment. The calculation of efficiency factor of pure, double-flow and three-flow turbojet engines is given. Based on the calculation, the economy analysis of these types of engines was made. Specific fuel consumption of three-flow engine at subsonic flight speeds (up to 300 m/s) is less than specific fuel consumption of turbojet engine and double-flow turbojet engine due to higher values of overall propulsive efficiency.
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