Experimental measurements and data analysis of the impact pressures in a sloshing experiment

A sloshing experiment has been setup in order to carry out analysis on the behaviour of LNG (Liquefied Natural Gas) tanks on board of marine vessels. The experiment aimed to measure with accuracy the high pressure generated during the impacts of the fluid in the case of rectilinear sinusoidal motion in the direction of sway. A two-dimensional tank model has been used for this purpose. The pressures due to fluid sloshing are measured at several locations along the tank boundaries together with the position of the tank and acquisition of images of the flow. This paper describes the experimental procedures that have been put in place to acquire the data and ensure its quality. The problems encountered during the activity are illustrated in detail in order to provide useful indications to other researchers. The different types of impact observed during the experiment, the characteristics of the measured pressures and the implementation of an algorithm for their correct identification are discussed in detail. (C) 2012 Elsevier Ltd. All rights reserved.