Experimental data on Interceptor's effectiveness

In order to achieve a good understanding of how the interceptor works, a research project has been started using a CFD RANS-multiphase code and Towing Tank experimental. In this work is presented the progress made on the research obtained from subsequent Towing Tank experiments. The study has been focused on the variations of interceptor’s effectiveness induced by deadrise angle, longitudinal centre of gravity LCG and interceptor’s geometry. In particular have been tested, at Rn > 5.8×106, three V-shaped bottom prismatic hulls, 2.8 m long. The models have deadrise angles = 10, 20 and 30 deg respectively and the FnVol range studied is 1.3 ÷ 2.8. These evaluations have been performed for different interceptor’s height and with two values of LCG. Finally, in order to separate the influence of interceptors on lift variations and trim reductions, test with fixed trim and imposed sinkage on different device heights have been performed