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<p>In this paper, the dynamic stability of an unmanned underwater vessel is a crucial aspect affecting its performance. Through the utilization of ANSYS Fluent and the SST K-omega turbulence model, analytical assessment was conducted for captive model tests—such as planar motion mechanism, and the rotating arm test—which were simulated to acquire essential hydrodynamic derivatives of the vessel. This research investigates the effect on dynamic stability of an underwater vessel when using eyebrow hydroplanes with different stern forms: CE (cruciform with eyebrow configuration) and XE (X-form with Eyebrow Configuration), utilizing DARPA Suboff as the base model. The straight-line test was simulated to obtain linear velocity-based hydrodynamic derivatives, and for rotational velocity derivatives, the rotating arm test was simulated with Frame Motion setting in Fluent. All simulations were carried out at 6.5 knots speed, employing 3 incidence angles (1°, 3°, 5°) for straight-line tests and 3 radii (15, 24, 40m) for rotating arm test. Comparative analysis of the DARPA SUBOFF model with experimental data demonstrated accuracy within 15% error. Hence, the validated procedure was used for CFD analysis of eyebrow hydroplane configuration with both cruciform and X-form stern planes.</p>

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CFD study for the effect of eyebrow forward planes on dynamic stability of unmanned underwater vehicle with different stern forms

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • Balaj Hussain,
  • Arifa Hussain,
  • Muhammad Aasil Qureshi,
  • Sameer Adnan Ansari,
  • Muhammad Ali Tariq,
  • Junaid Ahmed Khan,
  • Muhammad Tanveer Khan

摘要

In this paper, the dynamic stability of an unmanned underwater vessel is a crucial aspect affecting its performance. Through the utilization of ANSYS Fluent and the SST K-omega turbulence model, analytical assessment was conducted for captive model tests—such as planar motion mechanism, and the rotating arm test—which were simulated to acquire essential hydrodynamic derivatives of the vessel. This research investigates the effect on dynamic stability of an underwater vessel when using eyebrow hydroplanes with different stern forms: CE (cruciform with eyebrow configuration) and XE (X-form with Eyebrow Configuration), utilizing DARPA Suboff as the base model. The straight-line test was simulated to obtain linear velocity-based hydrodynamic derivatives, and for rotational velocity derivatives, the rotating arm test was simulated with Frame Motion setting in Fluent. All simulations were carried out at 6.5 knots speed, employing 3 incidence angles (1°, 3°, 5°) for straight-line tests and 3 radii (15, 24, 40m) for rotating arm test. Comparative analysis of the DARPA SUBOFF model with experimental data demonstrated accuracy within 15% error. Hence, the validated procedure was used for CFD analysis of eyebrow hydroplane configuration with both cruciform and X-form stern planes.