Pressure reconstruction from PIV measurements in the bow region of a fast ship

The paper presents velocity measurements, using particle image velocimetry, as well a reconstruction of hydrodynamic pressures for the analysis fast ships. Stereoscopic PIV measurements with towed underwater system are conducted during towing tank tests to obtain field in bow region ship at speeds up Fr=0.8. While model is kept fixed trim and sinkage, multi-plane total 68 measurement planes reconstruct volumetric representation time-averaged region. obtained subsequently used description pressure field. In addition these captive runs, forced oscillation conducted. During tests, flow recorded three successive local phase-averaged its gradients postprocessing procedure reconstruction, including solution Poisson equation, implemented into open-source CFD package OpenFOAM. For detection free surface hull, an automated presented. Experimental results finally compared from numerical simulations. Results show that method capable capturing characteristics ship. addition, it can be together equation However, large out-of-plane velocities require dynamic range, which limits resolution effects close hull. • Underwater velocities. 2D 3D measured fields around Comparison velocity,