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Article Dans Une Revue Physical Review Letters Année : 2013

Ship Wakes: Kelvin or Mach Angle?

Résumé

From the analysis of a set of airborne images of ship wakes, we show that the wake angles decrease as U-1 at large velocities, in a way similar to the Mach cone for supersonic airplanes. This previously unnoticed Mach-like regime is in contradiction with the celebrated Kelvin prediction of a constant angle of 19.47 o independent of the ship's speed. We propose here a model, confirmed by numerical simulations, in which the finite size of the disturbance explains this transition between the Kelvin and Mach regimes at a Froude number F r = U/ √ gL 0.5, where L is the hull ship length.
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hal-04353008 , version 1 (19-12-2023)

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Marc Rabaud, Frederic Moisy. Ship Wakes: Kelvin or Mach Angle?. Physical Review Letters, 2013, 110, pp.214503. ⟨10.1103/PhysRevLett.110.214503⟩. ⟨hal-04353008⟩
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