Hydrodynamic analysis of an underwater glider wing using ANSYS fluent as an investigation tool

Meyers, Luyanda; Msomi, Velaphi

doi:10.1016/j.matpr.2021.02.127

Cited by 8 publications

(3 citation statements)

References 11 publications

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“…[17] Based on a nominal forward velocity Ṽ of the chosen reference UUV (see Section S1 and Figure S2, Supporting Information) of 0.25 m s À1 and on preliminary studies, an angle of attack (AoA) of α ¼ 12°m aximizes the efficiency of the chosen wing profile. [18] Since wings are mounted with α ¼ 0°with respect to the underwater gliders' longitudinal axis, the AoA of the vehicle coincides with that of the soft wing. To increase the generated lift L, and reduce the manufacturing complexity, an untapered wing design with no sweep, aspect ratio (AR) of 1.6, and chord length of 230 mm was chosen.…”

Section: Designmentioning

confidence: 99%

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

Giordano,

Achenbach,

Lenggenhager

et al. 2024

Advanced Intelligent Systems

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Section: Designmentioning

confidence: 99%

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

Giordano,

Achenbach,

Lenggenhager

et al. 2024

Advanced Intelligent Systems

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“…[ 17 ] Based on a nominal forward velocity

\overset{\rightarrow}{V}

of the chosen reference UUV (see Section S1 and Figure S2, Supporting Information) of 0.25 m s −1 and on preliminary studies, an angle of attack (AoA) of

\alpha \left(= 12\right)^{\circ}

maximizes the efficiency of the chosen wing profile. [ 18 ] Since wings are mounted with

\alpha \left(= 0\right)^{\circ}

with respect to the underwater gliders’ longitudinal axis, the AoA of the vehicle coincides with that of the soft wing. To increase the generated lift

\overset{\rightarrow}{L}

, and reduce the manufacturing complexity, an untapered wing design with no sweep, aspect ratio (AR) of 1.6, and chord length of 230 mm was chosen.…”

Section: Design and Manufacturingmentioning

confidence: 99%

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

Giordano,

Achenbach,

Lenggenhager

et al. 2024

Advanced Intelligent Systems

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Actuators based on soft elastomers offer significant advantages to the field of robotics, providing greater adaptability, improving collision resilience, and enabling shape‐morphing. Thus, soft fluidic actuators have seen an expansion in their fields of application. Closed‐cycle hydraulic systems are pressure agnostic, enabling their deployment in extremely high‐pressure conditions, such as deep‐sea environments. However, soft actuators have not been widely adopted on unmanned underwater vehicle control surfaces for deep‐sea exploration due to their unpredictable hydrodynamic behavior when camber‐morphing is applied. This study presents the design and characterization of a soft wing and investigates its feasibility for integration into an underwater glider. It is found that the morphing wing enables the glider to adjust the lift‐to‐drag ratio to adapt to different flow conditions. At the operational angle of attack of 12.5°, the lift‐to‐drag ratio ranges from −70% to +10% compared to a rigid version. Furthermore, it reduces the need for internal moving parts and increases maneuverability. The findings lay the groundwork for the real‐world deployment of soft robotic principles capable of outperforming existing rigid systems. With the herein‐described methods, soft morphing capabilities can be enabled on other vehicles.

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“…In a previous study, the effects of two different airfoil constructions on the gliding performance of gliders were compared based on numerical and experimental methods [8]. The optimal design parameters of the National Advisory Committee for Aeronautics (NACA) airfoil were obtained by performing hydrodynamic analysis of the glider airfoil using computational fluid dynamics (CFD) [9]. Furthermore, the influence of NACA airfoil shape on the gliding economy and stability of UG was analyzed using hydrodynamic method [10].…”

Section: Introductionmentioning

confidence: 99%

Study on Position and Shape Effect of the Wings on Motion of Underwater Gliders

Huang

Choi

et al. 2022

JMSE

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A typical structure of an underwater glider (UG) includes a pair of fixed wings, and the hydrodynamic force driving the glider forward as descending or ascending in the water is generated primarily by the fixed wings. In this paper, a simplified glider motion model was established to analyze the dynamics in an easier way, and whose simulation results do not differ from the original one. Also, in the paper, the effects of the wing position and wing shape on the UG to the motion were studied. Since no direct analytic approach cannot be performed, the case study of the effects of six different wing positions and three wing shapes on gliding performances which are gliding speed, gliding angle and gliding path were performed through computer simulation. The simulation results revealed that when the fixed wing is located far from the buoyancy center to the tail end, more traveling range is achieved with less energy. Also, effect of the shape difference of the wings were analyzed. Shape changes did not show much difference on the travelling performance of the UG. In addition to these, the transient mode of the UG was studied. To control this, the PID controller for the position of the mass shifter and piston were applied. By application of the PID controller to the linearized dynamics equations, it was shown that the transient behavior of the UG was quickly and steadily controlled.

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Hydrodynamic analysis of an underwater glider wing using ANSYS fluent as an investigation tool

Cited by 8 publications

References 11 publications

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

A Soft Robotic Morphing Wing for Unmanned Underwater Vehicles

Study on Position and Shape Effect of the Wings on Motion of Underwater Gliders

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