An experimental model with passively variable stiffness to investigate the effect of body stiffness on the fish fast-start maneuver

Currier, Todd; Modarres‐Sadeghi, Yahya

doi:10.1007/s00348-019-2790-6

Cited by 7 publications

(9 citation statements)

References 26 publications

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“…The flow field was quantified using BIV with the hydrogen bubbles as tracing elements. This process is described in Currier & Modarres-Sadeghi (2019).…”

Section: Experimental Methodsmentioning

confidence: 99%

Flow-induced vibrations of a square prism free to oscillate in the cross-flow and inline directions

2021

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“…The flow field was quantified using BIV with the hydrogen bubbles as tracing elements. This process is described in Currier & Modarres-Sadeghi (2019).…”

Section: Experimental Methodsmentioning

confidence: 99%

Flow-induced vibrations of a square prism free to oscillate in the cross-flow and inline directions

2021

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“…[14,25,26]. Pitching foils/panels exhibit inclination of the trailing edge towards the anterior direction during pitching motions to produce the angle-of-attack [27]. Zeyghami and Moored [28] studied the thrust generation and propulsive efficiency of a hinged mechanism while undergoing pitching motion.…”

Section: Introductionmentioning

confidence: 99%

Effects of root chord movement on thrust generation of oscillatory pectoral fins

Arastehfar

Chew

2021

Bioinspir. Biomim.

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Fin kinematics is the key to thrust generation of oscillatory pectoral fins of manta rays. This could be one of the main reasons that fin designs of robotic manta rays are becoming more complex to simulate the fin kinematics more closely so as to generate high thrusts. However, as the trend suggests, the extent of improvement to thrust generation might not be worth the complexities added to the designs. Out-of-the-box design changes that favour the simplicity and yet improve the fin performance can be a sound replicate for the complicated fin design features. One aspect of manta rays’ pectoral fins that influences the fin kinematics is the constraint imposed on the movement of their particularly long root chord that is entirely attached to the body of manta rays. Hypothetically, reducing such a constraint can promote the angle-of-attack during flapping, which can improve thrust generation. This paper aims to study if the simple idea of disengagement of the fin root chord from the body, which is obviously a deviation from the nature, can improve thrust generation. An experiment was conducted on thrust generation of four basic fin designs, where different portions of their chord was disengaged from the body step-by-step. The disengagement occurred for each quarter of the chord, starting from the trailing edge towards the leading edge. It was found that the fins with free root chord (minimal attachment to the body) could generate thrust slightly less than the fully constrained fins (full attachment). In addition, it was shown that thrust generation efficiency kept increasing while disengaging the chord further, and reached the maximum for free root chord. This may show that a powerful and yet more efficient fin can be produced with such a deviation from the nature.

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“…The flow field was quantified using image velocimetry with the hydrogen bubbles as tracing elements. This process is described in Currier & Modarres-Sadeghi (2019).…”

Section: Experimental Set-up and Methodsmentioning

confidence: 99%

Dynamics of a hydrofoil free to oscillate in the wake of a fixed, constantly rotating or periodically rotating cylinder

2021

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An experimental model with passively variable stiffness to investigate the effect of body stiffness on the fish fast-start maneuver

Cited by 7 publications

References 26 publications

Flow-induced vibrations of a square prism free to oscillate in the cross-flow and inline directions

Flow-induced vibrations of a square prism free to oscillate in the cross-flow and inline directions

Effects of root chord movement on thrust generation of oscillatory pectoral fins

Dynamics of a hydrofoil free to oscillate in the wake of a fixed, constantly rotating or periodically rotating cylinder

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