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Performance analysis of flapping foil flow energy harvester subjected to non-sinusoidal pitching motion

Performance analysis of flapping foil flow energy harvester subjected to non-sinusoidal pitching motion
Performance analysis of flapping foil flow energy harvester subjected to non-sinusoidal pitching motion

Two-dimensional flow simulation study is carried out to investigate the aerodynamic performance and efficiency of Fully Active flapping foil flow energy harvesters subjected to non-sinusoidal pitching motion. The device comprises of NACA0015 airfoil which is mounted on a translational spring and damper system. The airfoil is subjected to non-sinusoidal pitching and sinusoidal heaving motion through external excitation. Under the influence of time varying fluid forces, the net energy extraction can be achieved from the system. The impact of non-sinusoidal pitching motion and airfoil thickness is studied, using simulations in Ansys Fluent ®, on the performance of such energy harvesters. Airfoil motion is accommodated by allowing the use of sliding meshes. The User Defined Functions(UDFs) are used to induce airfoil and mesh motion. Heaving motion is realized by reference frame motion. Different non-sinusoidal profiles are tested and their effect of energy extraction performance is investigated. It is found that the major part of energy extraction obtained by heaving motion. The non-sinusoidal pitching motion helps improve the formation and development of leading edge vortex, synchronization of vertical force and vertical velocity by increasing the peak value of vertical force. This results in an improved energy extraction performance. The maximum power extraction efficiency of 39.12% is achieved for NACA at Re=1100 for selectively tuned parameters.

American Institute of Aeronautics and Astronautics
Javed, Ali
b75c4c28-d544-40c6-b939-ce54ad9f9ec3
Jamil, Muhammad
080e644a-061c-4c26-82f7-3f587c8cd187
Bilal, Bilal
0351c309-94f0-4a38-ab1e-7f41de29684d
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Shams, Taimur A.
921ed862-0cd0-4b7c-9e93-b92c53ea9c71
Javed, Ali
b75c4c28-d544-40c6-b939-ce54ad9f9ec3
Jamil, Muhammad
080e644a-061c-4c26-82f7-3f587c8cd187
Bilal, Bilal
0351c309-94f0-4a38-ab1e-7f41de29684d
Djidjeli, Kamal
94ac4002-4170-495b-a443-74fde3b92998
Shams, Taimur A.
921ed862-0cd0-4b7c-9e93-b92c53ea9c71

Javed, Ali, Jamil, Muhammad, Bilal, Bilal, Djidjeli, Kamal and Shams, Taimur A. (2018) Performance analysis of flapping foil flow energy harvester subjected to non-sinusoidal pitching motion. In 2018 Fluid Dynamics Conference. American Institute of Aeronautics and Astronautics.. (doi:10.2514/6.2018-4258).

Record type: Conference or Workshop Item (Paper)

Abstract

Two-dimensional flow simulation study is carried out to investigate the aerodynamic performance and efficiency of Fully Active flapping foil flow energy harvesters subjected to non-sinusoidal pitching motion. The device comprises of NACA0015 airfoil which is mounted on a translational spring and damper system. The airfoil is subjected to non-sinusoidal pitching and sinusoidal heaving motion through external excitation. Under the influence of time varying fluid forces, the net energy extraction can be achieved from the system. The impact of non-sinusoidal pitching motion and airfoil thickness is studied, using simulations in Ansys Fluent ®, on the performance of such energy harvesters. Airfoil motion is accommodated by allowing the use of sliding meshes. The User Defined Functions(UDFs) are used to induce airfoil and mesh motion. Heaving motion is realized by reference frame motion. Different non-sinusoidal profiles are tested and their effect of energy extraction performance is investigated. It is found that the major part of energy extraction obtained by heaving motion. The non-sinusoidal pitching motion helps improve the formation and development of leading edge vortex, synchronization of vertical force and vertical velocity by increasing the peak value of vertical force. This results in an improved energy extraction performance. The maximum power extraction efficiency of 39.12% is achieved for NACA at Re=1100 for selectively tuned parameters.

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More information

e-pub ahead of print date: 24 June 2018
Published date: 25 June 2018
Venue - Dates: 48th AIAA Fluid Dynamics Conference, 2018, Atlanta, United States, 2018-06-25 - 2018-06-29

Identifiers

Local EPrints ID: 424573
URI: http://eprints.soton.ac.uk/id/eprint/424573
PURE UUID: d5f1e16a-ccb8-4edf-a5d9-9edb6e45380f

Catalogue record

Date deposited: 05 Oct 2018 11:38
Last modified: 17 Jan 2019 17:30

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