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Flapping Wing Energy Harvesting: Aerodynamic Aspects

Geissler, Wolfgang (2020) Flapping Wing Energy Harvesting: Aerodynamic Aspects. CEAS Aeronautical Journal, 11, pp. 379-389. Springer. doi: 10.1007/s13272-019-00394-1. ISSN 1869-5582.

Full text not available from this repository.

Official URL: https://doi.org/10.1007/s13272-019-00394-1

Abstract

Aerodynamic forces on flapping wings create forward thrust. Natural flyers like birds and insects apply these forces effectively. Extensive studies have shown that the efficiency of flapping wings can be improved by various means. Of importance is the development and control of leading edge vortices (LEV's). Thrust production means that energy is transferred from the flapping system into the fluid. In a similar way it can be achieved that energy flows from the fluid into the flapping system, i.e. fluid energy may be harvested. Responsible for the direction of energy flow is the ratio of pitching amplitude versus amplitude of the induced incidence of the plunging motion. If this ratio is smaller than unity thrust energy is produced; if it is larger than unity energy is transferred into the flapping system. In the present paper, emphasis is placed on the detailed study of the aerodynamic effects and on some ideas of optimization of energy harvesting of a flapping system. It will be shown that similar to the thrust production mode also in the energy harvesting mode, the influence of LEV's is of major concern. The control of these vortices by airfoil deformation is shown to be beneficial for optimizing the efficiency of energy harvesting.

Item URL in elib:https://elib.dlr.de/127190/
Document Type:Article
Additional Information:Print ISSN 1869-5582 Online ISSN 1869-5590
Title:Flapping Wing Energy Harvesting: Aerodynamic Aspects
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Geissler, WolfgangWolfgang.Geissler (at) dlr.deUNSPECIFIED
Date:13 June 2020
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:11
DOI :10.1007/s13272-019-00394-1
Page Range:pp. 379-389
Editors:
EditorsEmailEditor's ORCID iD
UNSPECIFIEDSpringer ViennaUNSPECIFIED
Publisher:Springer
ISSN:1869-5582
Status:Published
Keywords:Flapping wing aerodynamic, Energy harvesting mode, Effect of LEV's, Optimization procedures
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Virtual Aerodynamic Rotorcraft (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Helicopter, GO
Deposited By: Carter, Beatrice
Deposited On:07 Jun 2019 17:00
Last Modified:04 Sep 2020 11:39

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