Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/89983
Title: | Enhancing propulsion performance of a flexible heaving foil through dynamically adjusting its flexibility | Authors: | Wang, C Ren, F Tang, H |
Issue Date: | Nov-2019 | Source: | Bioinspiration and biomimetics, Nov. 2019, v. 14, no. 6, 64002 | Abstract: | This study investigates how dynamically adjusting the bending stiffness of a heaving foil affects its propulsion performance in a flow of Reynolds number 200. The foil is forced to oscillate sinusoidally at the leading edge, and its bending stiffness is tuned in a square-wave manner. Such a fluid-structure interaction (FSI) problem is explored using an immersed boundary lattice Boltzmann method (IBLBM) based numerical framework. The results reveal that when the lower and upper bounds of the foil's time-dependent bending stiffness are moderate, the net thrust can be evidently enhanced compared to those in the corresponding constant-bending-stiffness cases, while the propulsion efficiency is not apparently ameliorated. The most significant enhancement is observed when the bending stiffness has lower and upper bounds of the same duration (i.e. a duty cycle of 1/2) and also it remains at the lower bound during stroke reversals (corresponding to an actuation phase angle of). When the two bounds simultaneously increase or decrease, however, dynamically adjusting the bending stiffness fails to improve the net thrust. Through this study, competitions among various forces/moments, including the inertial force, tension force, bending moment and fluid loading, acting on the foil and their influences on the foil's dynamics are also unveiled. | Keywords: | Dynamic flexibility Flapping foil propulsion Fluid-structure interaction Immersed boundary lattice Boltzmann method |
Publisher: | Institute of Physics Publishing | Journal: | Bioinspiration and biomimetics | ISSN: | 1748-3182 | EISSN: | 1748-3190 | DOI: | 10.1088/1748-3190/ab45d9 | Rights: | © 2019 IOP Publishing Ltd This is the Accepted Manuscript version of an article accepted for publication in Bioinspiration & Biomimetics. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1748-3190/ab45d9. |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1530_ThrEnh_UnmarkedUp.pdf | Pre-Published version | 2.26 MB | Adobe PDF | View/Open |
Page views
38
Last Week
0
0
Last month
Citations as of Apr 28, 2024
Downloads
21
Citations as of Apr 28, 2024
SCOPUSTM
Citations
4
Citations as of Apr 5, 2024
WEB OF SCIENCETM
Citations
4
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.