Effect of a splitter plate on the performance of magnetostrictive flow-induced vibrational power generator using a cantilevered circular cylinder DOI Creative Commons

Takuma SHIMA,

Takahiro KIWATA,

Sotaro TAKEUCHI

и другие.

Transactions of the JSME (in Japanese), Год журнала: 2024, Номер 90(933), С. 23 - 00257

Опубликована: Янв. 1, 2024

In order to improve a vibrational power generator using magnetostrictive material, i.e., Iron-gallium alloy, and flow-induced vibration of cantilevered cylinder, fixed splitter plate was installed behind circular cylinder. Effects gap between cylinder on the performance response amplitude, vortex shedding frequency were investigated through wind tunnel experiments. Flow visualizations around also conducted by smoke-wire method high-speed camera. The test models had span length L 200 mm, 300 mm 400 mm. diameter D 40 A with thickness 2 center model G varied from 8 104 For small ratio G/D ≤ 0.6, galloping occurred. From smoke wire visualization, it related that upstream flow went along side surface inner circulatory generated near gap. As result, accelerated gap-flow occurred negative pressure periodically upper or lower wall large ≥ 1.2, did not occur, amplitude became similar without plate. generation having = 0.2 largest. However, onset velocity larger than other cylinders gaps.

Язык: Английский

The roles of rigid splitter plates in flow-induced vibration of a circular cylinder DOI
Yuankun Sun, Jiasong Wang, Dixia Fan

и другие.

Physics of Fluids, Год журнала: 2022, Номер 34(11)

Опубликована: Окт. 22, 2022

While it is known that rigid splitter plates play significant roles in flow control, the exact of them flow-induced vibration (FIV) have not been systematically investigated. This has motivated present work to experimentally investigate FIV a cylinder equipped with an upstream plate (USP), downstream (DSP), and symmetrically arranged water tunnel Reynolds number 1100–7700. The length range L* = 0–3.6 (L*=L/D, L length, D diameter). response characteristics, vortex evolution, fluid force, pressure fields are thoroughly analyzed. Both USP DSP can succeed oscillation mitigation drag reduction. However, dramatic galloping observed for 0.4–3.2. low-pressure region forms near beneficial trigger galloping. For USP, only vortex-induced found, transition branches corresponds variation frequency phase jumps total transverse force force. mode from 2S 2P disappears long length. Flow visualization reveals induced by alters shedding. Furthermore, high-pressure tip yielding obstructive suppresses growth oscillation. With combination DSP, weak excited narrow 1.0–1.8, linear increase also broken due existence USP.

Язык: Английский

Процитировано

27
Vortex-induced vibration suppression of cactus-like cylinders DOI
Ruicong Wu, Jiabin Liu, J. Qu

и другие.

Ocean Engineering, Год журнала: 2024, Номер 299, С. 117201 - 117201

Опубликована: Март 6, 2024

Язык: Английский

Процитировано

4
FIV and energy harvesting using bluff body piezoelectric water energy harvester with different cross-sections DOI
Yu Shen, Jiasong Wang, Md. Mahbub Alam

и другие.

Ocean Engineering, Год журнала: 2023, Номер 288, С. 116121 - 116121

Опубликована: Окт. 27, 2023

Язык: Английский

Процитировано

9
Numerical simulation of vortex-induced vibration of a circular cylinder at Reynolds number of 2.5×105 DOI

Yigang Gong,

Hanxu Zheng,

Haibo Xu

и другие.

Ocean Engineering, Год журнала: 2025, Номер 326, С. 120876 - 120876

Опубликована: Март 10, 2025

Язык: Английский

Процитировано

0
Mitigation of fluctuating lift and drag on a cylinder with a biomimetic synthetic jet orifice device inspired by shark pectoral fins DOI
Yonghui An, Guangyang Wei, Jinping Ou

и другие.

Ocean Engineering, Год журнала: 2025, Номер 329, С. 121157 - 121157

Опубликована: Апрель 8, 2025

Язык: Английский

Процитировано

0
CFD analysis of flow-induced rotation of a circular cylinder with a detached rear splitter plate in laminar flow DOI
Tao Tang, Hongjun Zhu,

Quanyu Chen

и другие.

Ocean Engineering, Год журнала: 2022, Номер 266, С. 112703 - 112703

Опубликована: Окт. 3, 2022

Язык: Английский

Процитировано

13
The Suppression of Flow-Induced Vibrations for a Single and Two Tandem-Arrangement Cylinders Using Three Splitter Plates DOI Creative Commons
Zhongming Hu, Jiasong Wang, Yuankun Sun

и другие.

Journal of Marine Science and Engineering, Год журнала: 2024, Номер 12(9), С. 1487 - 1487

Опубликована: Авг. 28, 2024

Some very useful methods for suppressing the flow-induced vibration (FIV) of a single cylinder are known to potentially have limited efficiency tandem-arrangement cylinders. In this paper, three splitter plates uniformly attached around with an angle 120° proposed suppress FIVs both and two cylinders in wind tunnel at Re = 4000–45,200. The plates’ length diameter ratios, L/Ds (where L is plate D diameter), set from 0.1 0.8. results show that method not only effectively suppresses vortex-induced (VIV) cylinder, but also successfully mitigates wake-induced galloping (WIG) vibrations suppressed, consistently achieving suppression efficiencies over 95% 0.2–0.8, notable peak 98.4% L/D 0.2. For S/D 4.0 S center-to-center spacing between cylinders), upstream exceed 96% optimal 97.4% 0.6. downstream exhibits 0.1, 0.2, 0.4, resulting 80.3%, 67.1%, 91.0%. remain fully suppressed throughout entire reduced velocity range 0.6–0.8, reaching 98.7% Three regimes fs/fn characteristics can be classified wake structures shear layers develop along front before attaching on then offset either side by rear plates, contributing absence periodic vortex shedding.

Язык: Английский

Процитировано

2
Effect of a splitter plate on the performance of magnetostrictive flow-induced vibrational power generator using a cantilevered circular cylinder DOI Creative Commons

Takuma SHIMA,

Takahiro KIWATA,

Sotaro TAKEUCHI

и другие.

Transactions of the JSME (in Japanese), Год журнала: 2024, Номер 90(933), С. 23 - 00257

Опубликована: Янв. 1, 2024

In order to improve a vibrational power generator using magnetostrictive material, i.e., Iron-gallium alloy, and flow-induced vibration of cantilevered cylinder, fixed splitter plate was installed behind circular cylinder. Effects gap between cylinder on the performance response amplitude, vortex shedding frequency were investigated through wind tunnel experiments. Flow visualizations around also conducted by smoke-wire method high-speed camera. The test models had span length L 200 mm, 300 mm 400 mm. diameter D 40 A with thickness 2 center model G varied from 8 104 For small ratio G/D ≤ 0.6, galloping occurred. From smoke wire visualization, it related that upstream flow went along side surface inner circulatory generated near gap. As result, accelerated gap-flow occurred negative pressure periodically upper or lower wall large ≥ 1.2, did not occur, amplitude became similar without plate. generation having = 0.2 largest. However, onset velocity larger than other cylinders gaps.

Язык: Английский

Процитировано

0