Hydrodynamic study of flapping foil propulsion system fitted to surface and underwater vehicles
TL;DR: The engineering translation of the aquatic animal propulsion systems and its appropriate application to marine vehicles help them to achieve movement with less power and hence resulting in the CO2 emissions in the marine vehicles as discussed by the authors.
Abstract: The engineering translation of the aquatic animal propulsion systems and its appropriate application to marine vehicles help them to achieve movement with less power and hence resulting in the CO2 ...
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01 Dec 2020
TL;DR: An overview of the existing state-of-the-art investigations on recently developed flapping foil propulsion of UAVs and AUVs for the exploration of Earth's oceans and other terrestrial bodies such as Mars, Titan, Europa, Enceladus with the use of aerial, terrestrial, and underwater rovers is presented in this paper.
Abstract: Locomotion techniques employed by different biological animals are extremely diverse and fascinating from an engineering point of view. The explorations of planets such as Mars, Titan, Europa, Enceladus with the use of aerial, terrestrial, and underwater rovers are gaining significant interest from academia, industry, planetary scientists, robotic engineers, and international space agencies around the globe. This article presents an overview of the existing state-of-the-art investigations on recently developed flapping foil propulsion of UAVs (unmanned aerial vehicles) and AUVs (autonomous underwater vehicles) for the exploration of Earth’s oceans and other terrestrial bodies such as Mars, Jupiter’s moon Europa, and Saturn’s moon Titan. The use of flapping foils further advances into Martian Atmospheres in the form of insect-inspired micro aerial vehicles working at low Reynolds numbers. The development of aerial vehicles mimicking insect flapping is essential in low Reynolds number environments to generate sufficient lift and thrust for carrying out future Mars missions. The Cassini mission to Titan, Voyage mission, and other flyby missions to Europa found that liquid atmosphere exists on the subsurface of Europa and on the surface of Titan in the form of liquid methane lakes. The ice-covered ocean under the Europa surface is analogous to the Antarctic ice. The developments of autonomous surface ships and underwater vehicles for the exploration of the planets in cryogenic conditions are discussed with suitable biomimetic propulsion systems. The design methodology, hydrodynamic stability, and resistance estimation in cryogenic atmospheres are presented which can act as a benchmark for future missions.
10 citations
07 Oct 2019
TL;DR: In this article, an overview of aquatic propulsion systems, numerical simulations of flapping foils and ship model self-propulsion experiments performed using flapping foil system, particle image velocimetry (PIV), and digital fluoroscopy studies conducted on fish locomotion.
Abstract: Regulations and performance requirements related to technology development on all modes of transport vehicles for reduced pollution and environmental impact have become more stringent. Greening of transport system has been recognized as an important factor concerning global warming and climate change. Thus environment-friendly technical solutions offering a reduction of noxious exhaust gases are in demand. Aquatic animals have good swimming and maneuvering capabilities and these observations have motivated research on fish-like propulsion for marine vehicles. The fish fin movements, used by fish for their locomotion and positioning, are being replicated by researchers as flapping foils to mimic the biological system. Studies show that flapping foil propulsion systems are generally more efficient than a conventional screw propeller, which suffers efficiency losses due to wake. The flapping foil propulsors usually do not cavitate and have less wake velocity variation. These aspects result in the reduction of noise and vibration. The present study will cover an overview of aquatic propulsion systems, numerical simulations of flapping foils and ship model self-propulsion experiments performed using flapping foil system, particle image velocimetry (PIV), and digital fluoroscopy studies conducted on fish locomotion. Studies performed on underwater and surface vehicles fitted with flapping fins will also be presented.
4 citations
TL;DR: Bionic pectoral fins play an essential role in achieving the superior swimming ability of the bio-inspired undersea monitoring platform by producing desired movements and propulsion forces as mentioned in this paper. But their performance is limited.
Abstract: Bionic pectoral fins play an essential role in achieving the superior swimming ability of the bio-inspired undersea monitoring platform by producing desired movements and propulsion forces. This pa...
3 citations
Cites background from "Hydrodynamic study of flapping foil..."
...…subsea installations efficiently and safely, the traditional offshore industry has undergone continuous technical innovation, especially in developing and employing the subsea operating mobile platform (Lee and Ku 2016; Mai et al. 2017; Mannam and Krishnankutty 2018; Sverdrup-Thygeson et al. 2018)....
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TL;DR: In this paper, the hydrodynamic analysis of flapping foil inspired by the thunniform fish propulsion is carried out numerically for 2D and 3D rigid oscillating foils.
Abstract: The hydrodynamic analysis of flapping foil inspired by the thunniform fish propulsion is carried out numerically. The hydrodynamic performances of 2D and 3D rigid oscillating foils are analysed for...
1 citations
Cites background from "Hydrodynamic study of flapping foil..."
...Mannam and Krishnankutty (2018) implemented a flapping foil for a surface fish and robotic fish....
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TL;DR: In this article, the hydrodynamic characteristics of a remote-operated vehicle (ROV) were analyzed to monitor the subsea-surface mooring and piping lines, and the results showed that the ROV is able to monitor subsea surface moorings and lines.
Abstract: Underwater remotely operated vehicle (ROV) is used to monitor the subsea-surface mooring and piping lines. In this study, the hydrodynamic characteristics of a remote-operated vehicle are analysed ...
1 citations
References
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TL;DR: In this article, the phase angle between transverse oscillation and angular motion is the critical parameter affecting the interaction of leading-edge and trailing-edge vorticity, as well as the efficiency of propulsion.
Abstract: Thrust-producing harmonically oscillating foils are studied through force and power measurements, as well as visualization data, to classify the principal characteristics of the flow around and in the wake of the foil. Visualization data are obtained using digital particle image velocimetry at Reynolds number 1100, and force and power data are measured at Reynolds number 40 000. The experimental results are compared with theoretical predictions of linear and nonlinear inviscid theory and it is found that agreement between theory and experiment is good over a certain parametric range, when the wake consists of an array of alternating vortices and either very weak or no leading-edge vortices form. High propulsive efficiency, as high as 87%, is measured experimentally under conditions of optimal wake formation. Visualization results elucidate the basic mechanisms involved and show that conditions of high efficiency are associated with the formation on alternating sides of the foil of a moderately strong leading-edge vortex per half-cycle, which is convected downstream and interacts with trailing-edge vorticity, resulting eventually in the formation of a reverse Karman street. The phase angle between transverse oscillation and angular motion is the critical parameter affecting the interaction of leading-edge and trailing-edge vorticity, as well as the efficiency of propulsion.
1,209 citations
Additional excerpts
...(Anderson et al. 1998)....
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TL;DR: Tuning cruise kinematics to optimize St seems to be a general principle of oscillatory lift-based propulsion of swimming and flying animals.
Abstract: Dimensionless numbers are important in biomechanics because their constancy can imply dynamic similarity between systems, despite possible differences in medium or scale. A dimensionless parameter that describes the tail or wing kinematics of swimming and flying animals is the Strouhal number, St = fA/U, which divides stroke frequency (f) and amplitude (A) by forward speed (U). St is known to govern a well-defined series of vortex growth and shedding regimes for airfoils undergoing pitching and heaving motions. Propulsive efficiency is high over a narrow range of St and usually peaks within the interval 0.2 < St < 0.4 (refs 3-8). Because natural selection is likely to tune animals for high propulsive efficiency, we expect it to constrain the range of St that animals use. This seems to be true for dolphins, sharks and bony fish, which swim at 0.2 < St < 0.4. Here we show that birds, bats and insects also converge on the same narrow range of St, but only when cruising. Tuning cruise kinematics to optimize St therefore seems to be a general principle of oscillatory lift-based propulsion.
865 citations
"Hydrodynamic study of flapping foil..." refers background in this paper
...Based on the observation of fish movements, the aquatic animals produce thrust by oscillating its fins where the Strouhal number falls between 0.2 and 0.45 (Fish 1998; Taylor et al. 2003)....
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Book•
01 Jun 1965
TL;DR: Fluid-dynamic drag: practical information on aerodynamic drag and hydrodynamic resistance, Fluid-dynamics drag as discussed by the authors, Fluid dynamic drag: real-time information about aerodynamic and hydrodyynamic resistance.
Abstract: Fluid-dynamic drag: practical information on aerodynamic drag and hydrodynamic resistance , Fluid-dynamic drag: practical information on aerodynamic drag and hydrodynamic resistance , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
759 citations
"Hydrodynamic study of flapping foil..." refers methods in this paper
...The numerical and experimental analyses carried out by different researchers (Hoerner 1965; Read et al. 2003; FRINA 2007; Godoy-Diana et al. 2008; Floc’h et al. 2012; Politis and Tsarsitalidis 2014; Ebrahimi and Abbaspour 2016) have thrown light on the effectiveness of oscillating foil propulsion…...
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...The following equation is used to estimate the form factor (1 + k) for a streamlined body as a function of vehicle length (l) and diameter (d) (Hoerner 1965)....
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TL;DR: In this paper, a harmonically heaving and pitching foil with a superposed pitch bias was evaluated to determine its propulsive efficiency under conditions of significant thrust production, as function of the principal parameters: the heave amplitude, Strouhal number, angle of attack, and phase angle between heave and pitch.
436 citations
"Hydrodynamic study of flapping foil..." refers methods in this paper
...The numerical and experimental analyses carried out by different researchers (Hoerner 1965; Read et al. 2003; FRINA 2007; Godoy-Diana et al. 2008; Floc’h et al. 2012; Politis and Tsarsitalidis 2014; Ebrahimi and Abbaspour 2016) have thrown light on the effectiveness of oscillating foil propulsion…...
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TL;DR: It is shown that the transition from a B vK wake to a reverse BvK wake precedes the actual drag-thrust transition and the significance of the present results in the analysis of flapping systems in nature is discussed.
Abstract: We study experimentally the vortex streets produced by a flapping foil in a hydrodynamic tunnel, using two-dimensional particle image velocimetry. An analysis in terms of a flapping frequency-amplitude phase space allows the identification of (i) the transition from the well-known Benard-von Karman (BvK) wake to the reverse BvK vortex street that characterizes propulsive wakes, and (ii) the symmetry breaking of this reverse BvK pattern giving rise to an asymmetric wake. We also show that the transition from a BvK wake to a reverse BvK wake precedes the actual drag-thrust transition and we discuss the significance of the present results in the analysis of flapping systems in nature.
220 citations
"Hydrodynamic study of flapping foil..." refers methods in this paper
...The numerical and experimental analyses carried out by different researchers (Hoerner 1965; Read et al. 2003; FRINA 2007; Godoy-Diana et al. 2008; Floc’h et al. 2012; Politis and Tsarsitalidis 2014; Ebrahimi and Abbaspour 2016) have thrown light on the effectiveness of oscillating foil propulsion…...
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