Font Size:
Fluid-structure interactions during the high speed water entry of a plate
Last modified: 2015-05-22
Abstract
The results of an extensive experimental campaign of the water impact of plates at high horizontal speed will be presented. The study, which was originally motivated by the application to the ditching in the aeronautical context, is also of interest for the
fluid-structure interaction in high speed planing craft moving on rough sea.
More specifically, tests on plates of different shape and rigidity have been performed. The vertical/horizontal velocity ratio and the pitch angle have been varies too. In order to capture correctly the hydrodynamic phenomena, like cavitation and ventilation, and the fluid structure interaction of thin plates, experiments have been conducted at full
scale, with horizontal velocity in the range 30 to 46 m/s and vertical velocity of 1.5 m/s.
In order to perform the tests, a new high speed impact facility has been designed and installed at the end of the CNR-INSEAN towing tank. A careful analysis has been conducted to characterize the test-to-test dispersion of the experimental setup and the results, given in Iafrati et al. (2014), revealed a high level or repeatability in terms of all measured quantities.
Results will be presented in terms of pressures, strains and loads. Attention will be focused on the role of some of the governing parameter (e.g. pitch angle, vertical/horizontal velocity ratio, shape, rigidity) on the hydrodynamics and on the fluid-strucure interaction aspects.
References
Iafrati A., Grizzi S., Siemann M.H., Benitez-Montanes L. "Experimental analysis of the water entry of a plate at high horizontal speed", 30th ONR Symp. Naval Hydrodynamics, Hobart (AU), November 2014
fluid-structure interaction in high speed planing craft moving on rough sea.
More specifically, tests on plates of different shape and rigidity have been performed. The vertical/horizontal velocity ratio and the pitch angle have been varies too. In order to capture correctly the hydrodynamic phenomena, like cavitation and ventilation, and the fluid structure interaction of thin plates, experiments have been conducted at full
scale, with horizontal velocity in the range 30 to 46 m/s and vertical velocity of 1.5 m/s.
In order to perform the tests, a new high speed impact facility has been designed and installed at the end of the CNR-INSEAN towing tank. A careful analysis has been conducted to characterize the test-to-test dispersion of the experimental setup and the results, given in Iafrati et al. (2014), revealed a high level or repeatability in terms of all measured quantities.
Results will be presented in terms of pressures, strains and loads. Attention will be focused on the role of some of the governing parameter (e.g. pitch angle, vertical/horizontal velocity ratio, shape, rigidity) on the hydrodynamics and on the fluid-strucure interaction aspects.
References
Iafrati A., Grizzi S., Siemann M.H., Benitez-Montanes L. "Experimental analysis of the water entry of a plate at high horizontal speed", 30th ONR Symp. Naval Hydrodynamics, Hobart (AU), November 2014
Conference registration is required in order to view papers.