CFD approach to modelling, hydrodynamic analysis and motion characteristics of a laboratory underwater glider with experimental results

Singh, Yogang; Bhattacharyya, S. K.; Idichandy, V. G.

doi:10.1016/j.joes.2017.03.003

Cited by 83 publications

(37 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Geometry of the AUV was created in ANSYS SpaceClaim 2017 and was designed based on the glider in the paper [18] for the possibility of comparing the results. The sister glider was the background for our research.…”

Section: Geometrymentioning

confidence: 99%

See 1 more Smart Citation

CFD Approach to Modelling Hydrodynamic Characteristics of Underwater Glider

Stryczniewicz

Drężek

2019

Transactions on Aerospace Research

View full text Add to dashboard Cite

Autonomous underwater gliders are buoyancy propelled vehicles. Their way of propulsion relies upon changing their buoyancy with internal pumping systems enabling them up and down motions, and their forward gliding motions are generated by hydrodynamic lift forces exerted on a pair of wings attached to a glider hull. In this study lift and drag characteristics of a glider were performed using Computational Fluid Dynamics (CFD) approach and results were compared with the literature. Flow behavior, lift and drag forces distribution at different angles of attack were studied for Reynolds numbers varying around 105 for NACA0012 wing configurations. The variable of the glider was the angle of attack, the velocity was constant. Flow velocity was 0.5 m/s and angle of the body varying from −8° to 8° in steps of 2°. Results from the CFD constituted the basis for the calculation the equations of motions of glider in the vertical plane. Therefore, vehicle motion simulation was achieved through numeric integration of the equations of motion. The equations of motions will be solved in the MatLab software. This work will contribute to dynamic modelling and three-dimensional motion simulation of a torpedo shaped underwater glider.

show abstract

Section: Geometrymentioning

confidence: 99%

“…The predicted value of L / D ≈ 9 was considered sufficiently high. Results in the literature [18] showed that the symmetrical wing profile performs better than the cambered wing profile. Therefore, NACA0012 profile was adopted for the glider.…”

Section: Geometrymentioning

confidence: 99%

CFD Approach to Modelling Hydrodynamic Characteristics of Underwater Glider

Stryczniewicz

Drężek

2019

Transactions on Aerospace Research

View full text Add to dashboard Cite

show abstract

“…With the increasingly wide activities in deep-sea exploration and exploitation, underwater vehicles of various types have become indispensable tools for scientists, researchers and engineers to conduct ocean research and perform underwater tasks [1][2][3][4][5][6][7][8][9][10][11][12]. Among them, autonomous underwater vehicles (AUVs), which are developed to provide high automation, cost-effectiveness, and medium and long-range capability to execute underwater missions without placing human lives at risk [13], are increasingly being used in highly detailed survey and inspection applications including the exploration of unknown environments [14], oceanographic observations [15], the inspection of underwater structures [16] and so on.…”

Section: Introductionmentioning

confidence: 99%

Combined Depth Control Strategy for Low-Speed and Long-Range Autonomous Underwater Vehicles

Zhao

Zhang

et al. 2020

JMSE

View full text Add to dashboard Cite

Autonomous underwater vehicles (AUVs) are increasingly being applied to highly detailed survey and inspection tasks over large ocean regions. These vehicles are required to have underwater hovering and low-speed cruising capabilities, and energy-saving property to enable long-range missions. To this end, a combined depth control strategy is proposed in which an on-off type variable ballast system (VBS) is adopted for satisfactory hovering or fast descending/ascending without propulsion to reach the designated cruising depth, whereas the bow and stern fins act as the actuator to maintain the cruising depth for more energy saving. A hierarchical architecture-based VBS controller, which comprises a ballast water mass planner and an on-off mass flowrate controller, is developed to assure good hovering performance of the on-off type VBS. Both numerical studies and basin tests are conducted on a middle-sized AUV to verify the feasibility and validity of this depth control strategy.

show abstract

“…The remarkable propulsive and manoeuvring mechanisms of aquatic swimmers, that have fascinated researchers since the 1970s, inspire the design of modern autonomous underwater vehicles (AUV) as well as autonomous underwater gliders (AUG) for marine environmental data acquisition, see, e.g., [1], biomimetic swimming robots and novel propulsion devices with enhanced efficiency, see, e.g., [2]. Selection of the swimming mode to serve as inspiration for the artificial devices closely depends on hydromechanical aspects of the application itself.…”

Section: Introductionmentioning

confidence: 99%

A Non-Linear BEM–FEM Coupled Scheme for the Performance of Flexible Flapping-Foil Thrusters

Anevlavi

Filippas

Karperaki

et al. 2020

JMSE

View full text Add to dashboard Cite

Recent studies indicate that nature-inspired thrusters based on flexible oscillating foils show enhanced propulsive performance. However, understanding the underlying physics of the fluid–structure interaction (FSI) is essential to improve the efficiency of existing devices and pave the way for novel energy-efficient marine thrusters. In the present work, we investigate the effect of chord-wise flexibility on the propulsive performance of flapping-foil thrusters. For this purpose, a numerical method has been developed to simulate the time-dependent structural response of the flexible foil that undergoes prescribed large general motions. The fluid flow model is based on potential theory, whereas the elastic response of the foil is approximated by means of the classical Kirchhoff–Love theory for thin plates under cylindrical bending. The fully coupled FSI problem is treated numerically with a non-linear BEM–FEM scheme. The validity of the proposed scheme is established through comparisons against existing works. The performance of the flapping-foil thrusters over a range of design parameters, including flexural rigidity, Strouhal number, heaving and pitching amplitudes is also studied. The results show a propulsive efficiency enhancement of up to 6% for such systems with moderate loss in thrust, compared to rigid foils. Finally, the present model after enhancement could serve as a useful tool in the design, assessment and control of flexible biomimetic flapping-foil thrusters.

show abstract

CFD approach to modelling, hydrodynamic analysis and motion characteristics of a laboratory underwater glider with experimental results

Cited by 83 publications

References 10 publications

CFD Approach to Modelling Hydrodynamic Characteristics of Underwater Glider

CFD Approach to Modelling Hydrodynamic Characteristics of Underwater Glider

Combined Depth Control Strategy for Low-Speed and Long-Range Autonomous Underwater Vehicles

A Non-Linear BEM–FEM Coupled Scheme for the Performance of Flexible Flapping-Foil Thrusters

Contact Info

Product

Resources

About