A new aircraft architecture based on the ACHEON Coanda effect nozzle: flight model and energy evaluation

European Transport Research Review

Original Paper

Michele Trancossi¹  Dean Vucinic²  Anna Sunol²  Shyam Sumanta Das³  Jose Pascoa Marques³  Paul Stewart⁴  Francesco Grimaccia⁵  Eliana Porreca⁶  Chris Bingham⁷  Tim Smith⁷  Antonio Dumas⁸  Maharshi Subhash⁸  Diego Angeli⁸  Mauro Madonia⁸ 

[1] ACES, Sheffield Hallam University, City Campus, Howard Street, S1 1WB, Sheffield, UK;Department of Mechanical Engineering, Vrije Universiteit Brussel, Triomflaan 43 - Room TL43/2.12, B-1050, Brussels, Belgium;Faculty of Engineering, Convento de Santo António, Universidade da Beira Interior, 6201-001, Covilhã, Portugal;Institute for Innovation in Sustainable Engineering, University of Derby, Lonsdale House, Quaker Lane, DE1 3HB, Derby, UK;Nimbus srl, Lombardore, Torino, Italy;Dipartimento di Energia, Politecnico di Milano, Campus Bovisa - Via La Masa, 34, 20156, Milan, Italy;Reggio Emilia Innovazione, via Sicilia 31, 42122, Reggio Emilia, Italy;School of Engineering, Brayford Pool, University of Lincoln, LN6 7TS, Lincoln, UK;Università di Modena e Reggio Emilia, Di.S.M.I., Via Amendola, 2, 42100, Reggio Emilia, Italy;

关键词: Aerial propulsion;    Coanda;    Energy efficiency;    Energy model;    Flight model;    Short takeoff and landing;   

DOI  :  10.1007/s12544-016-0198-4

 received in 2014-12-06, accepted in 2016-02-10,  发布年份 2016

来源: Springer

【 摘 要 】

PurposeAeronautic transport has an effective necessity of reducing fuel consumption and emissions to deliver efficiency and competitiveness driven by today commercial and legislative requirements. Actual aircraft configurations scenario allows envisaging the signs of a diffused technological maturity and they seem very near their limits. This scenario clearly shows the necessity of radical innovations with particular reference to propulsion systems and to aircraftarchitecture consequently.MethodsThis paper presents analyses and discusses a promising propulsive architecture based on an innovative nozzle, which allows realizing the selective adhesion of two impinging streams to two facing jets to two facing Coanda surfaces. This propulsion system is known with the acronym ACHEON (Aerial Coanda High Efficiency Orienting Nozzle). This paper investigates how the application of an all-electric ACHEONs propulsion system to a very traditional commuter aircraft can improve its relevant performances. This paper considers the constraints imposed by current state-of-the-art electric motors, drives, storage and conversion systems in terms of both power/energy density and performance and considers two different aircraft configurations: one using battery only and one adopting a more sophisticated hybrid cogeneration. The necessity of producing a very solid analysis has forced to limit the deflection of the jet in a very conservative range (±15°) with respect to the horizontal. This range can be surely produced also by not optimal configurations and allow minimizing the use of DBD. From the study of general flight dynamics equations of the aircraft in two-dimensional form it has been possible to determine with a high level of accuracy the advantages that ACHEON brings in terms of reduced stall speed and of reduced take-off and landing distances. Additionally, it includes an effective energy analysis focusing on the efficiency and environmental advantages of the electric ACHEON based propulsion by assuming the today industrial grade high capacity batteries with a power density of 207 Wh/kg.ResultsIt has been clearly demonstrated that a short flight could be possible adopting battery energy storage, and longer duration could be possible by adopting a more sophisticated cogeneration system, which is based on cogeneration from a well-known turboprop, which is mostly used in helicopter propulsion. This electric generation system can be empowered by recovering the heat and using it to increase the temperature of the jet. It is possible to transfer this considerable amount of heat to the jet by convection and direct fluid mixing. In this way, it is possible to increase the energy of the jets of an amount that allows more than recover the pressure losses in the straitening section. In this case, it is then possible to demonstrate an adequate autonomy of flight and operative range of the aircraft. The proposed architecture, which is within the limits of the most conservative results obtained, demonstrates significant additional benefits for aircraft manoeuvrability. In conclusion, this paper has presented the implantation of ACHEON on well-known traditional aircraft, verifying the suitability and effectiveness of the proposed system both in terms of endurance with a cogeneration architecture and in terms of manoeuvrability. It has demonstrated the potential of the system in terms of both takeoff and landing space requirements.ConclusionsThis innovation opens interesting perspectives for the future implementation of this new vector and thrust propulsion system, especially in the area of greening the aeronautic sector. It has also demonstrated that ACHEON has the potential of renovating completely a classic old aircraft configuration such as the one of Cessna 402.

【 授权许可】

CC BY   
© The Author(s) 2016

【 图 表 】

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