Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
On the use of calculus of variations to the shape of hovering rotors of minimum power and its application to micro air vechicles
Year:2012
Research Areas
  • Mechanical aeronautics and naval engineering
Information
Abstract
In this paper, calculus of variations and combined blade element and momentum theory (BEMT) are used to demonstrate that, in hover, when neither root nor tip losses are considered; the rotor, which minimizes the total power (MPR), generates an induced velocity that varies linearly along the blade span. The angle of attack of every blade element is constant and equal to its optimum value. The traditional ideal twist (ITR) and optimum (OR) rotors are revisited in the context of this variational framework. Two more optimum rotors are obtained considering root and tip losses, the ORL, and the MPRL. A comparison between these five rotors is presented and discussed. The MPR and MPRL present a remarkable saving of power for low values of both thrust coefficient and maximum aerodynamic efficiency. The result obtained can be exploited to improve the aerodynamic behaviour of rotary wing micro air vehicles (MAV). A comparison with experimental results obtained from the literature is presented.
International
Si
JCR
Si
Title
Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering
ISBN
0954-4100
Impact factor JCR
0,488
Impact info
Volume
226
10.1177/0954410011411636
Journal number
From page
574
To page
588
Month
ABRIL
Ranking
Participants
  • Autor: Oscar Lopez Garcia (UPM)
  • Autor: Alvaro Cuerva Tejero (UPM)
  • Autor: S. Esteban (Department of Aerospace Engineering. Universidad de Sevilla, Sevilla, Spain)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Desarrollo y Ensayos Aeroespaciales
  • Centro o Instituto I+D+i: Instituto Universitario de Microgravedad "Ignacio da Riva"
  • Departamento: Vehículos Aeroespaciales
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