Self-issuing jets for suppression of vortex-induced vibration of a single box girder. (April 2019)
- Record Type:
- Journal Article
- Title:
- Self-issuing jets for suppression of vortex-induced vibration of a single box girder. (April 2019)
- Main Title:
- Self-issuing jets for suppression of vortex-induced vibration of a single box girder
- Authors:
- Chen, Wen-Li
Yang, Wen-Han
Li, Hui - Abstract:
- Abstract: The control of vortex-induced vibration (VIV) is very important for the safety of a bridge during its service life. In the present study, a self-issuing jet, which is a type of a passive control method, is installed on a bridge deck to suppress the VIV and to validate the control effect. This study focuses on the layout of the slits in a deck test model and compares the near-wake flow fields between the baseline and optimal-control cases. The experimental results show that the self-issuing jet plays an important role in controlling the vibration. The vertical VIV (V-VIV) is fully suppressed, and the maximum amplitude of the torsional VIV (T-VIV) is reduced by 45.5%. The Strouhal number ( St = fB / U, where f and B are the frequency and reference length of the structure, respectively, and U is the incoming speed) of the best control case (Case II) in which the self-issuing jets are arranged at the upper half part of the lower inclined panel in the box section increases compared with that in the baseline case. The wake-flow structures in the V-VIV and T-VIV are also studied. The results show that the wake patterns are modified by the self-issuing jet. In the V-VIV case, the alternating wake-flow structures are changed into a relatively steady state and show a slight variation with time in the control case, i.e. Case II. In the T-VIV case, the strength of the spanwise vortex is reduced, whereas the streamwise vortex is increased by the self-issuing jet. Moreover, aAbstract: The control of vortex-induced vibration (VIV) is very important for the safety of a bridge during its service life. In the present study, a self-issuing jet, which is a type of a passive control method, is installed on a bridge deck to suppress the VIV and to validate the control effect. This study focuses on the layout of the slits in a deck test model and compares the near-wake flow fields between the baseline and optimal-control cases. The experimental results show that the self-issuing jet plays an important role in controlling the vibration. The vertical VIV (V-VIV) is fully suppressed, and the maximum amplitude of the torsional VIV (T-VIV) is reduced by 45.5%. The Strouhal number ( St = fB / U, where f and B are the frequency and reference length of the structure, respectively, and U is the incoming speed) of the best control case (Case II) in which the self-issuing jets are arranged at the upper half part of the lower inclined panel in the box section increases compared with that in the baseline case. The wake-flow structures in the V-VIV and T-VIV are also studied. The results show that the wake patterns are modified by the self-issuing jet. In the V-VIV case, the alternating wake-flow structures are changed into a relatively steady state and show a slight variation with time in the control case, i.e. Case II. In the T-VIV case, the strength of the spanwise vortex is reduced, whereas the streamwise vortex is increased by the self-issuing jet. Moreover, a Mode-B flow pattern is found in the wake flow field of the test model in Case II, which implies that the secondary wake instability is triggered by the self-issuing jet. … (more)
- Is Part Of:
- Journal of fluids and structures. Volume 86(2019)
- Journal:
- Journal of fluids and structures
- Issue:
- Volume 86(2019)
- Issue Display:
- Volume 86, Issue 2019 (2019)
- Year:
- 2019
- Volume:
- 86
- Issue:
- 2019
- Issue Sort Value:
- 2019-0086-2019-0000
- Page Start:
- 213
- Page End:
- 235
- Publication Date:
- 2019-04
- Subjects:
- Vortex-induced vibration -- Self-issuing jet -- Spanwise vortex -- Streamwise vortex -- Passive control
Fluid-structure interaction -- Periodicals
Fluid mechanics -- Periodicals
Structural dynamics -- Periodicals
Structural analysis (Engineering) -- Periodicals
620.106 - Journal URLs:
- http://www.sciencedirect.com/science/journal/08899746 ↗
http://www.idealibrary.com ↗
http://firstsearch.oclc.org ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.jfluidstructs.2019.02.017 ↗
- Languages:
- English
- ISSNs:
- 0889-9746
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4984.510000
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