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Multidisciplinary design and optimisation of conceptual rotorcraft powerplants for operational performance and environmental impact

Published online by Cambridge University Press:  27 January 2016

F. Ali ,
K. Tzanidakis ,
I. Goulos ,
V. Pachidis  and
R. d’Ippolito
F. Ali
Affiliation:
Propulsion Engineering Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedford, UK
K. Tzanidakis
Affiliation:
Propulsion Engineering Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedford, UK
I. Goulos
Affiliation:
Propulsion Engineering Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedford, UK
V. Pachidis
Affiliation:
Propulsion Engineering Centre, School of Aerospace, Transport and Manufacturing, Cranfield University, Bedford, UK
R. d’Ippolito
Affiliation:
Noesis Solutions, Belgium
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Abstract

This paper demonstrates the application of an integrated rotorcraft multidisciplinary design and optimisation framework, deployed for the purpose of preliminary design and assessment of optimum regenerative powerplant configurations for rotorcraft applications. The proposed approach comprises a wide-range of individual modelling theories applicable to rotorcraft flight dynamics, gas turbine engine performance and weight estimation as well as a physics-based stirred reactor model, for the rapid estimation of various gas turbine gaseous emissions. A single-objective Particle Swarm Optimiser is coupled with the aforementioned rotorcraft design framework. The overall methodology is deployed for the design and optimisation of a reference multipurpose Twin-Engine-Light civil rotorcraft, modelled after the Bo105 helicopter, which employs two Rolls-Royce Allison 250-C20B turboshaft engines. Through the implementation of a single-objective optimisation strategy, notionally based optimum engine design configurations are acquired in terms of engine weight, mission fuel burn and mission gaseous emissions inventory at constant technology level.

The acquired optimum regenerative engine configurations are subsequently deployed for the design of conceptual rotorcraft regenerative engine configurations, targeting improved mission fuel economy, enhanced payload-range capability as well as overall environmental impact, while maintaining the respective rotorcraft airworthiness requirements. The proposed methodology essentially constitutes as an enabler for designing rotorcraft powerplants within realistic, three-dimensional operations and towards realising their associated design trade-offs at mission level.

Type
Research Article
Information
The Aeronautical Journal , Volume 119 , Issue 1217 , July 2015 , pp. 891 - 914
Copyright
Copyright © Royal Aeronautical Society 2015

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