Performance prediction of high-speed planing craft with interceptors using a variation of the savitsky method

Srikanth Syamsundar, Raju Datla

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

19 Scopus citations

Abstract

A prismatic hull was used to study the effect of interceptors on the performance of planing craft. Interceptors are flat surfaces that are a small geometric projection of the transom plane and cause an interruption in the water flow. This alters the pressure distribution on the hull bottom in a very dramatic manner leading to large variations in drag, running trim and heave. These parameters were measured in a model study using different interceptor penetrations, loads and center of gravity locations. An investigation of the results shows that it is possible to predict the performance parameters using Savitsky's iteration method after accounting for the pressure induced due to the interceptor, the dynamic drag on the interceptor and variation in center of pressure. A simple approximation to the drag force and an added normal force was derived and used in conjunction with Savitsky's iteration method. The predictions are fairly consistent with the measurements. Additionally the approximation for the added normal force was used to derive an equation for the non-dimensionalized added pitching moment.

Original languageEnglish
Title of host publication1st Chesapeake Power Boat Symposium 2008
Pages76-84
Number of pages9
StatePublished - 2008
Event1st Chesapeake Power Boat Symposium 2008 - Annapolis, MD, United States
Duration: 7 Mar 20088 Mar 2008

Publication series

Name1st Chesapeake Power Boat Symposium 2008

Conference

Conference1st Chesapeake Power Boat Symposium 2008
Country/TerritoryUnited States
CityAnnapolis, MD
Period7/03/088/03/08

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