Assessment of engine's power budget for hydrogen powered hybrid buoyant aircraft
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 advant...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Elsevier
2016
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/50069/ http://irep.iium.edu.my/50069/ http://irep.iium.edu.my/50069/ http://irep.iium.edu.my/50069/4/50069.pdf http://irep.iium.edu.my/50069/7/50069_assessement%20of%20engine%27s%20power_wos.pdf |
| Summary: | 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. |
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