Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil
Biomimetic design for engineering applications may suggest the optimal performance of engineering devices. In this work the passive/pure pitching characteristics of a hydrofoil are investigated experimentally with and without a pair of biomimetic fin strips placed symmetrically on the two sides of t...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-07-01
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| Series: | Biomimetics |
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| Online Access: | https://www.mdpi.com/2313-7673/10/7/462 |
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| author | Faraz Ikram Muhammad Yamin Younis Bilal Akbar Chuddher Usman Latif Haroon Mushtaq Kamran Afzal Muhammad Asif Awan Asad Ijaz Noman Bashir |
| author_facet | Faraz Ikram Muhammad Yamin Younis Bilal Akbar Chuddher Usman Latif Haroon Mushtaq Kamran Afzal Muhammad Asif Awan Asad Ijaz Noman Bashir |
| author_sort | Faraz Ikram |
| collection | DOAJ |
| description | Biomimetic design for engineering applications may suggest the optimal performance of engineering devices. In this work the passive/pure pitching characteristics of a hydrofoil are investigated experimentally with and without a pair of biomimetic fin strips placed symmetrically on the two sides of the foil leading edge. The work is performed in a recirculating water channel at low Reynolds numbers (Re) with a range of 1300 ≤ Re ≤ 3200. Using high-speed videography and Particle Image Velocimetry (PIV), the pitching characteristics and wakes are visualized. Passive pitching characteristics, i.e., the pitching amplitude and pitching frequency of the hydrofoils, are investigated based on their trailing edge movement. Significant improvement in both pitching frequency and amplitudes are observed for the foil with fin strips compared to the baseline simple foil. Comparing the pitching characteristics of the two foils, it is observed that the hydrofoil with biomimetic fin strips exhibits 25% and 21% higher pitching amplitude and pitching frequency, respectively, compared to that of the baseline at comparable Reynolds numbers. The initiation of pitching for the finned foil is also observed at comparatively low Reynolds numbers. The wake is also studied using time mean and fluctuating velocity profiles obtained using PIV. |
| format | Article |
| id | doaj-art-327b7b5bf7f442a2a06ef13665a4271b |
| institution | DOAJ |
| issn | 2313-7673 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biomimetics |
| spelling | doaj-art-327b7b5bf7f442a2a06ef13665a4271b2025-08-20T02:45:33ZengMDPI AGBiomimetics2313-76732025-07-0110746210.3390/biomimetics10070462Impact of Biomimetic Fin on Pitching Characteristics of a HydrofoilFaraz Ikram0Muhammad Yamin Younis1Bilal Akbar Chuddher2Usman Latif3Haroon Mushtaq4Kamran Afzal5Muhammad Asif Awan6Asad Ijaz7Noman Bashir8Department of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Industrial Engineering, King Khalid University, Abha 61421, Saudi ArabiaDepartment of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708-0300, USADepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanDepartment of Mechanical Engineering, Mirpur University of Sciences and Technology, Mirpur 10250, AJK, PakistanBiomimetic design for engineering applications may suggest the optimal performance of engineering devices. In this work the passive/pure pitching characteristics of a hydrofoil are investigated experimentally with and without a pair of biomimetic fin strips placed symmetrically on the two sides of the foil leading edge. The work is performed in a recirculating water channel at low Reynolds numbers (Re) with a range of 1300 ≤ Re ≤ 3200. Using high-speed videography and Particle Image Velocimetry (PIV), the pitching characteristics and wakes are visualized. Passive pitching characteristics, i.e., the pitching amplitude and pitching frequency of the hydrofoils, are investigated based on their trailing edge movement. Significant improvement in both pitching frequency and amplitudes are observed for the foil with fin strips compared to the baseline simple foil. Comparing the pitching characteristics of the two foils, it is observed that the hydrofoil with biomimetic fin strips exhibits 25% and 21% higher pitching amplitude and pitching frequency, respectively, compared to that of the baseline at comparable Reynolds numbers. The initiation of pitching for the finned foil is also observed at comparatively low Reynolds numbers. The wake is also studied using time mean and fluctuating velocity profiles obtained using PIV.https://www.mdpi.com/2313-7673/10/7/462biomimetic finpitching foilpure/passive pitchingPIVvideography |
| spellingShingle | Faraz Ikram Muhammad Yamin Younis Bilal Akbar Chuddher Usman Latif Haroon Mushtaq Kamran Afzal Muhammad Asif Awan Asad Ijaz Noman Bashir Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil Biomimetics biomimetic fin pitching foil pure/passive pitching PIV videography |
| title | Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil |
| title_full | Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil |
| title_fullStr | Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil |
| title_full_unstemmed | Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil |
| title_short | Impact of Biomimetic Fin on Pitching Characteristics of a Hydrofoil |
| title_sort | impact of biomimetic fin on pitching characteristics of a hydrofoil |
| topic | biomimetic fin pitching foil pure/passive pitching PIV videography |
| url | https://www.mdpi.com/2313-7673/10/7/462 |
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