A PIV-based method for estimating slamming loads during water entry of rigid bodies
Nila, A.; Vanlanduit, S.; Vepa, S.; Van Paepegem, W. (2013). A PIV-based method for estimating slamming loads during water entry of rigid bodies. Meas. Sci. Technol. 24(4): 12 pp. dx.doi.org/10.1088/0957-0233/24/4/045303
In: Measurement Science and Technology. IOP Publishing: Bristol. ISSN 0957-0233; e-ISSN 1361-6501, meer
Hydrodynamic impact of bodies onto the water surface is a problem of great importance in the design of off-shore and naval structures (wave energy converters, off-shore platforms, highspeed boats, etc). Classical measurement techniques, namely pressure sensors, present major drawbacks in the determination of impact loads because of their intrusive nature. In this paper, we propose a method to determine the impact loads on rigid bodies during water entry, based on high-speed particle image velocimetry. The method consists of two steps: firstly, an automated procedure is developed to determine the velocity field from high-speed images during water impact. Secondly, the unsteady pressure field is estimated from the velocity fields, using a Poisson-based solver. The method is validated on a rigid wedge slamming experiment and the results are compared with results from computational fluid dynamics simulations (performed with the software LS-Dyna) and from the literature.
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