Distributed power-plant concept with gas drive of external fan module analysis

Аuthors

Ezrokhi Y. A.^*, Kalenskii S. M.^**, Morzeeva T. A.^**, 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 analyzes the concept of distributed power plant (DPP) for prospective long haul passenger aircraft. This DPP is intended to provide deeper integration of a power plant and an aircraft, as well as increase its fuel efficiency.

Possible variants of drive realization for external fan modules, as a constituent part of the distributed DPP, are presented. The necessity of considering the gas drive, realized by introducing an additional transient duct between the turbine of dual-flow turbojet engine and the turbine of the external fan.

The paper presents the preliminary analysis of DPP with gas drive of an external fan module developing possibility in the simplest for realization version incorporating a single external module.

The authors developed the technique for numerical study, carried out the evaluation of the specified DPP parameters under various values of total pressure losses in the transient duct to the external fan module and performed preliminary evaluation of the distributed power plant weight.

Further development of the considered distributed power-plant concept the additional gas heating in the transient duct while the take-off mode is offered. Additional calculations of new type engines are carried out, and estimation of new distributed power-plant structure parameters improvement possibilities is made.

In conclusion, comparison of the considered distributed power plant structures basic parameters at various degree of total pressure losses in the transient gas duct to the turbine of the external fan module is presented. The conclusion is drawn on the necessity to assign transient ducts and intermediate heating systems technologies to critical category.

Keywords:

dual-flow turbojet engine, prospective long-haul aircraft, dual-flow turbojet engine core, fan module, dual-flow turbojet engine design, distributed power plant

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