Optical Methods for Data Processing in Heat and Fluid Flow

15

The Measurement of the Velocity Field around a Ship Hull Model in a Towing Tank using PIV Method

J Dekowski, M Kocik, J Podliński, J Wasilewski, J Mizeraczyk, L Wilczyński, J Kanar, and J Stąsiek

Abstract

This Chapter concerns experimental investigation of the velocity field in the flow around a ship hull model using particle image velocimetry (PIV). The results of measurements of the velocity field, i.e. vector graphs and streamline patterns obtained during ship hull model tests in a towing tank are presented. As far as the sensitivity and accuracy of measurements are concerned the experiments proved that the PIV method perfectly met the requirements specific for ship hull model testing. The flow patterns obtained with the use of the PIV technique serve as the valuable source for further flow analysis as well as for numerical algorithms verification.

15.1 Introduction

Despite the fruitful and rapid development of analytical models and their numerical implementation, the experimental investigation of velocity field still serves as the ultimate source of data for the analysis of the flow around a ship hull model. It is generally accepted that the complexity of the flow around a ship hull results from the high value of the Reynolds number, the presence of a free surface and propeller-hull interactions substantially restrains the application of computational fluid dynamics (CFD) methods. Moreover, continuously increasing performance requirements concerning newly built ships, especially ...