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CFD analysis of turning abilities of a submarine model.

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Title: CFD analysis of turning abilities of a submarine model.
Authors: Dubbioso, G.1 giulioantonino.dubbioso@cnr.it, Broglia, R.1 riccardo.broglia@cnr.it, Zaghi, S.1 stefano.zaghi@cnr.it
Source: Ocean Engineering. Jan2017, Vol. 129, p459-479. 21p.
Subjects: Computational fluid dynamics, Submariners, Submarines (Ships), Parkour, Free surfaces (Crystallography)
Abstract: A detailed analysis of the maneuvering qualities of a submarine vehicle is carried out by means of a general purpose unsteady RaNSe based CFD solver. In particular, free running maneuvering simulations are performed both at infinite depth and close to the free surface (snorkeling operation) at a reference speed corresponding to Fr = 0.21 ; the analysis is restricted to three degrees of freedom (3DoF) maneuvers in the horizontal plane. The submarine model is equipped with two different control device arrangements, namely a cruciform and a X rudder configuration. The numerical results are presented in a phenomenological style and are partially validated with the experiments for the cruciform rudder configuration. Main finding highlights the superior turning abilities of the X rudder configuration with respect to the cruciform one. Moreover, it has been observed that, for the condition investigated and for both configurations, the stern appendages provide a destabilizing force only in the transient phase, while it acts as a fixed appendage during the steady turning phase. The study focuses also on the effect of grid refinement on both the maneuvering loads and the resulting dynamic response of the model. The analysis revealed that, at least for the present geometry and test, a rather coarse grid (order of millions of grid points) provides a reliable prediction of both the trajectory and kinematic parameters, but a rather inaccurate hydrodynamic loads estimation. [ABSTRACT FROM AUTHOR]
Copyright of Ocean Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 120448262
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: CFD analysis of turning abilities of a submarine model.
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  Data: <searchLink fieldCode="AR" term="%22Dubbioso%2C+G%2E%22">Dubbioso, G.</searchLink><relatesTo>1</relatesTo><i> giulioantonino.dubbioso@cnr.it</i><br /><searchLink fieldCode="AR" term="%22Broglia%2C+R%2E%22">Broglia, R.</searchLink><relatesTo>1</relatesTo><i> riccardo.broglia@cnr.it</i><br /><searchLink fieldCode="AR" term="%22Zaghi%2C+S%2E%22">Zaghi, S.</searchLink><relatesTo>1</relatesTo><i> stefano.zaghi@cnr.it</i>
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  Data: <searchLink fieldCode="JN" term="%22Ocean+Engineering%22">Ocean Engineering</searchLink>. Jan2017, Vol. 129, p459-479. 21p.
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  Data: <searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Submariners%22">Submariners</searchLink><br /><searchLink fieldCode="DE" term="%22Submarines+%28Ships%29%22">Submarines (Ships)</searchLink><br /><searchLink fieldCode="DE" term="%22Parkour%22">Parkour</searchLink><br /><searchLink fieldCode="DE" term="%22Free+surfaces+%28Crystallography%29%22">Free surfaces (Crystallography)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A detailed analysis of the maneuvering qualities of a submarine vehicle is carried out by means of a general purpose unsteady RaNSe based CFD solver. In particular, free running maneuvering simulations are performed both at infinite depth and close to the free surface (snorkeling operation) at a reference speed corresponding to Fr = 0.21 ; the analysis is restricted to three degrees of freedom (3DoF) maneuvers in the horizontal plane. The submarine model is equipped with two different control device arrangements, namely a cruciform and a X rudder configuration. The numerical results are presented in a phenomenological style and are partially validated with the experiments for the cruciform rudder configuration. Main finding highlights the superior turning abilities of the X rudder configuration with respect to the cruciform one. Moreover, it has been observed that, for the condition investigated and for both configurations, the stern appendages provide a destabilizing force only in the transient phase, while it acts as a fixed appendage during the steady turning phase. The study focuses also on the effect of grid refinement on both the maneuvering loads and the resulting dynamic response of the model. The analysis revealed that, at least for the present geometry and test, a rather coarse grid (order of millions of grid points) provides a reliable prediction of both the trajectory and kinematic parameters, but a rather inaccurate hydrodynamic loads estimation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Ocean Engineering is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.oceaneng.2016.10.046
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 21
        StartPage: 459
    Subjects:
      – SubjectFull: Computational fluid dynamics
        Type: general
      – SubjectFull: Submariners
        Type: general
      – SubjectFull: Submarines (Ships)
        Type: general
      – SubjectFull: Parkour
        Type: general
      – SubjectFull: Free surfaces (Crystallography)
        Type: general
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      – TitleFull: CFD analysis of turning abilities of a submarine model.
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              M: 01
              Text: Jan2017
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              Y: 2017
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