A Study on the Model-Ship Correlation Analysis of Powering Performance

동력추정을 위한 모형선-실선 상관해석에 관한 연구

This paper presents the model-ship correlations based on model test results of 36 ships. All of model tests were conducted at KRISO towing tank The correlation factors $C_P,\;C_N,\;and\;C_{NP}$ are estimated by the ITTC Standard Method and compared with the results of another towing tank. In the 36 ships, the block coefficients of thirty ships are greater than 0.72. Nevertheless the comparison of factors is in good agreement. The corrections to the scale effect on wake fraction ${\Delta}{\omega}_c$ and roughness allowance $C_{Ac}$ are subject matter in practice. The correction formulae are proposed by functions of ship length and form factor. And the correction formula of resistance coefficient ${\Delta}C_{Fc}$ based on Townsis's hull roughness formula is presented.

선박해양공학연구센터 예인수조에서 시험되었던 선박 가운데 선형과 프로펠러가 모형과 실선이 동일하였던 36척에 대하여 모형선-실선상관해석을 수행하였다. 뚱뚱한 선형이 대부분임에도 불구하고, 타수조의 결과보다 약간 나은 일치를 보였다. 통계적 처리에 의하여 반류비 수정계수와 거칠기 수정계수에 대한 회귀식을 구하였고, Townsin의 거칠기계수를 적용한 경우의 저항수정계수에 대한 식을 도출하였다.