Double-flow turboprop with afterburner weight indices estimation at the initial stage of its design

Аuthors

Ezrokhi Y. A.^*, Kalenskii S. M.^**, Kizeev I. S.^**

Central Institute of Aviation Motors named after P.I. Baranov, CIAM, 2, Aviamotornaya str., Moscow, 111116, Russia

*e-mail: yaezrokhi@ciam.ru
**e-mail: 30105@ciam.ru

Abstract

The paper considers perspective approaches to double-flow turboprop with afterburner weight estimation technique forming at the initial stage of its design, having potential of implementation with acceptable accuracy for new generation of engines.

The authors carried out analysis of the existing weight estimation techniques with different degree of their elementwise particularization, and under various methods of main regularities selection, linking engine gas-dynamic and weight parameters. “Modular” and integral engine weight estimation techniques were considered, and weights of 16 engines were computed using these techniques.

Based on carried out analysis, the sel ected variant of integral approach was updated with allowance for gathered statistical data on new generation of turboprop mass and gas-dynamic parameters. A correction factor, characterizing the generation to which a certain engine is related according to its weight efficiency, was determined.

Recommendations on weight estimation of an engine design based on the existing gas generator were developed. These recommendations imply implementation of correlation dependencies of the engine's separate modules weights fr om its operation parameters within the framework of the developed technique.

To determine the weight of turboprop with afterburner, developed on the basis of scaled or modified gas generator, a combined technique matching up either integral or “modular” approaches was formed.

Finally, the recommendations on implementation of the formed techniques with allowance for their future development by invoking additional data, including the data on newly developed engines, are provided.

Keywords:

turboprop with afterburner, turboprop with afterburner weight, advanced aircraft, turbofan core, turboprop with afterburner design

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