Journal of The School of Marine Science and Technology,Vol.3 No.2
A Hull Resistance Measuring System of the Circulating Water Channel
and its Performance Evaluation
Hakuya OZAKI and Hikaru YAGI
Abstract
The Circulating Water Channel (CWC)of Tokai University has been used for research works and education
program since 1981.A resistance measuring system using the channel was newly established in order to broaden its
application to the resistance evaluation of ships taking the opportunity of a maintenance work in September, 2004.
This report outlines the system including the feature of velocity fluctuation of the channel. Model tests were
conducted for the evaluation of accuracy in resistance measurement,and their analyses were made to investigate the
characteristics of the test system using four models;two merchant type ships and two fishing boats.
The analyzed results and their comparison with those at towing tanks and/or other circulating water channel
indicated that the resistance measuring system is useful in practice for the evaluation of hull resistance qualitatively.
It was also confirmed that quantitative evaluation is possible allowing the inevitable scatter of flow velocity,surface
disturbance.