Assessment of engine's power budget for hydrogen powered hybrid buoyant aircraft

UlHaque, Anwar and Asrar, Waqar and Omar, Ashraf Ali and Sulaeman, Erwin and Ali, JS Mohamed (2016) Assessment of engine's power budget for hydrogen powered hybrid buoyant aircraft. Propulsion and Power Research, 5 (1). pp. 34-44. ISSN 2212-540X

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Abstract

It is well known that hydrogen has less undesirable exhaust emissions as compared with other types of liquid fuels. It can be used as an alternative fuel for a hybrid buoyant aircraft in which half of the gross takeoff weight is balanced by the aerostatic lift. In the present study, weight advantage of liquid hydrogen as an ideal fuel has been explored for its further utilization in such aircraft. Existing relationships for the estimation of zero lift drag of airship is discussed with special focus on the utilization of such analytical relationships for the aircraft whose fuselage resembles with the hull of an airship. Taking the analytical relationship of aircraft and airship design as a reference, existing relationships for estimation of power budget are systematically re-derived for defined constraints of rate of climb, maximum velocity and takeoff ground roll. It is perceived that when the propulsion sizing for liquid hydrogen is required, then the presented framework for estimation of its power budget will provide a starting point for the analysis. An example for estimation of the power requirement is also presented as a test case.

Item Type:	Article (Journal)
Additional Information:	4277/50069
Uncontrolled Keywords:	Hybrid buoyant aircraft; Ballonet׳s inflation; Operator׳s constrains; Engine selection; Power budget
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL500 Aeronautics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof. Waqar Asrar
Date Deposited:	12 Apr 2016 09:30
Last Modified:	29 Dec 2016 11:35
URI:	http://irep.iium.edu.my/id/eprint/50069

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