Numerical simulations of flow past an autonomous underwater vehicle at various drift angles

Gomatam, Sreekar; Vengadesan, S.; Bhattacharyya, S. K.

doi:10.3329/jname.v9i2.12567

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Many numerical studies have been carried out to simulate the flow around the AUVs with a variety of methods. [16][17][18] The nature of complex vertical flow structures around the axisymmetric body with two different nose shapes (SUBOFF and DRDC STR) was experimentally investigated. Results indicated the nose curvature effects on the separation position, and also nose separation for the model with blunter nose shape takes place in smaller incidence angles.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of nose and tail of an autonomous underwater vehicle hull to reduce drag force using numerical simulation

Saghafi

Lavimi

2019

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this research, the flow around the autonomous underwater vehicles with symmetrical bodies is numerically investigated. Increasing the drag force in autonomous underwater vehicles increases the energy consumption and decreases the duration of underwater exploration and operations. Therefore, the main objective of this research is to decrease drag force with the change in geometry to reduce energy consumption. In this study, the decreasing or increasing trends of the drag force of axisymmetric bare hulls have been studied by making alterations in the curve equations and creating the optimal geometric shapes in terms of hydrodynamics for the noses and tails of autonomous underwater vehicles. The incompressible, three-dimensional, and steady Navier–Stokes equations have been used to simulate the flow. Also, k-ε Realizable with enhanced wall treatment was used for turbulence modeling. Validation results were acceptable with respect to the 3.6% and 1.4% difference with numerical and experimental results. The results showed that all the autonomous underwater vehicle hulls designed in this study, at an attack angle of 0°, had a lower drag force than the autonomous underwater vehicle hull used for validation except geometry no. 1. In addition, nose no. 3 has been selected as the best nose according to the lowest value of stagnation pressure, and also tail no. 3 has been chosen as the best tail due to the production of the lowest vortex. Therefore, geometry no. 5 has been designed using nose and tail no. 3. The comparison made here showed that the maximum drag reduction in geometry no. 5 was equal to 26%, and therefore, it has been selected as the best bare hull in terms of hydrodynamics.

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Section: Introductionmentioning

confidence: 99%

Optimal design of nose and tail of an autonomous underwater vehicle hull to reduce drag force using numerical simulation

Saghafi

Lavimi

2019

Proceedings of the Institution of Mechanical Engineers, Part M:

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“…Also, the separation point moved towards the nose at higher angle of attack. Gomatam et al (2012) conducted extensive numerical computations to study the effects of variations in drift angle on the flow past AUVs. The study showed that the presence of the control surfaces and non-zero angles of attack cause nonlinearity in pressure variation at the downstream of the axisymmetric body.…”

Section: Introductionmentioning

confidence: 99%

Unsteady CFD simulation of 3D AUV hull at different angles of attack

Ray

Chatterjee

Nandy

2016

J. nav. arch. mar. engg.

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Review of research and control technology of underwater bionic robots

Cui,

Li,

Wang

et al. 2023

Intell. Mar. Technol. Syst.

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As marine resources continue to be exploited, the remarkable locomotion and coordination of fish provide an excellent source of inspiration for scientists and engineers to design and control the next -generation autonomous underwater vehicles within a bionic framework. Underwater biomimetic robots combine bionics and robot technology, and their biological characteristics offer a lot of convenience for the robot so that it can obtain better performance in adaptability and robustness. Recently, with the combination of bionics, mechanics, electronics, materials science, and automation, there has been great progress in developing underwater bionic robots with different structure types and energy supply modes. This paper summarizes the research status of underwater robots, focuses on the research status of underwater bionic robots with different materials, types and motion modes, and introduces the propulsion mechanism of underwater robots with different structures and the control methods adopted in the propulsion process. Finally, the broad application prospect and market potential of underwater biomimetic robot are introduced.

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Numerical simulations of flow past an autonomous underwater vehicle at various drift angles

Cited by 4 publications

References 14 publications

Optimal design of nose and tail of an autonomous underwater vehicle hull to reduce drag force using numerical simulation

Optimal design of nose and tail of an autonomous underwater vehicle hull to reduce drag force using numerical simulation

Unsteady CFD simulation of 3D AUV hull at different angles of attack

Review of research and control technology of underwater bionic robots

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