Simulation of the flow over axisymmetric submarine hulls in steady turning

Zhang, J.T.; Maxwell, Jordan A.; Gerber, A. G.; Holloway, A. G. L.; Watt, George D.

doi:10.1016/j.oceaneng.2012.09.016

Cited by 38 publications

(13 citation statements)

References 8 publications

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“…However, the difference is not only related with the CFD method strategy but also with the processing of experimental error or the mesh resolution and so on. It is believed that the precision is close to that in reference (Zhang et al, 2013). In consequence, the present approach is applicable for engineering designs and can achieve similar precision to the classic approaches.…”

Section: Discussion On the Comparison Between Classic Approaches Andsupporting

confidence: 71%

“…For the classic approach, the computation domain is similar to the rotating arm test pool and established on a body-fixed coordinate system (Zhang et al, 2013). Therefore, the outer flow moves in arc trajectories.…”

Section: Discussion On the Comparison Between Classic Approaches Andmentioning

confidence: 99%

“…In the recent and state-of-the-art research paper by using RANS method of Zhang et al (2013), the authors change the grid for each simulating condition to ensure a body fitted structured grid aligned with the local flow field. The hydrodynamic force and moment coefficients for the SUBOFF-with-sting hull in steady turn with Re 6.5 10 6 = × were calculated.…”

Section: Discussion On the Comparison Between Classic Approaches Andmentioning

confidence: 99%

“…The hydrodynamic coefficients for an autonomous underwater vehicle (AUV) were calculated using the CFD method with added momentum sources. Zhang et al (2013) used the added momentum sources method and a novel hybrid meshing scheme to simulate the flow over a series of axisymmetric submarine hulls in steady turning condition. The CFD results agreed with the experimental data of the SUBOFF model.…”

Section: Introductionmentioning

confidence: 99%

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An effective CFD approach for marine-vehicle maneuvering simulation based on the hybrid reference frames method

Wang

Huang

et al. 2015

Ocean Engineering

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a b s t r a c tThe computational efficiency of CFD on maneuverability simulation poses a great difficulty resulting in its restricted applications. A hybrid reference frames method is established that combines the rotating reference frame method and an added momentum source method. The computational domain is separated into two parts under the rotating reference frame and the inertial frame respectively. A single mesh is needed for all conditions of a testing model such as different rotating arm radius, pitch angles and drift angles. The validation is carried out based on the numerical simulations on the flow fields around the SUBOFF models including sterns and full appended models. Results show that the stability derivatives of the yawing moment and yawing force agree well with the experimental data. Using a dimensional analysis method, the influences of the rotating arm radius and linear velocity are investigated. The similarity is maintained when the radius is constant, and the rotating effect performs strongly when the radius is small. The effects of pitch angle and drift angle are also discussed when the linear velocity is fixed with the fully appended SUBOFF model.

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Section: Discussion On the Comparison Between Classic Approaches Andsupporting

confidence: 71%

Section: Discussion On the Comparison Between Classic Approaches Andmentioning

confidence: 99%

Section: Discussion On the Comparison Between Classic Approaches Andmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

An effective CFD approach for marine-vehicle maneuvering simulation based on the hybrid reference frames method

Wang

Huang

et al. 2015

Ocean Engineering

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“…Philips et al [25] investigated the maneuvering of an over-actuated AUV named Delphin2 which is a hover-capable AUV. Zhang et al studied the motion equation in 6-DOF and analyzed the force and hydrodynamic coefficients of an AUV with fins in detail [26]. Meanwhile, Dantas et al [27] released a real time simulator for AUV development which simulated the motion and operation of main system of an AUV.…”

Section: Literature Reviewmentioning

confidence: 99%

Robust control for horizontal plane motions of autonomous underwater vehicles

Kamarlouei

Ghassemi

2015

J Braz. Soc. Mech. Sci. Eng.

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Nowadays autonomous underwater vehicles (AUVs) are employed as unmanned machines in ocean industries. For instance AUVs play an important role in coastal area monitoring and investigating underwater pipe line in deep seas. In this paper, navigation of an AUV near free surface and the effect of wave disturbance and unmodeled hydrodynamics as uncertain terms in control system are addressed. To stabilize the roll motion of the vehicle a practical control mode in mini-UVs is applied. Firstly, a 6-DOF nonlinear dynamic simulator is developed and dynamic stability of the vehicle is investigated. Then, a feedback linearization method is applied to turn the nonlinear system into a convenient linear one, and then a robust technique is applied to guarantee the stability and performance of the system. In addition, a genetic algorithm method is employed for achieving the best gains in feedback linearization control law. Three constraints are considered for optimization including amplitude of sway, yaw and roll motions. Final results show an effective motion control of the AUV in horizontal plane. Meanwhile a reasonable performance of robust control in presence of wave disturbance and un-modeled hydrodynamics is achieved.

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Flow Around Ships and Underwater Vehicles

Iafrati

2017

Encyclopedia of Maritime and Offshore Engineering

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In this contribution, some aspects of the flow generated by surface or underwater vehicles are discussed. The content is a synthetic review of the literature in the field. The basic features, which are already well established, are briefly recalled, whereas attention is mainly devoted to the most recent research advances on those hydrodynamic phenomena that are not yet fully understood or are at the research frontier of the field. These are the breaking of the bow wave and the subsequent vorticity generation, the separated turbulent flow at the stern, the effect of the scale on the flow characteristics, the flow about propellers and the mutual interaction of the propeller with ship hull and rudders, and the flow about ships in maneuver or in unsteady motion. For underwater vehicles, the discussion concerns the flow generated by a submarine in steady motion in open water or close to the free surface, the flow about the propeller and the interaction with hull, sail, and rudder. Finally, some considerations are given for supercavitating vehicles.

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Simulation of the flow over axisymmetric submarine hulls in steady turning

Cited by 38 publications

References 8 publications

An effective CFD approach for marine-vehicle maneuvering simulation based on the hybrid reference frames method

An effective CFD approach for marine-vehicle maneuvering simulation based on the hybrid reference frames method

Robust control for horizontal plane motions of autonomous underwater vehicles

Flow Around Ships and Underwater Vehicles

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