The fine optimization of ship hull lines in resistance performance by using CFD approach

摘要

In order to complete the fine optimization of ship hull lines, a classified optimization procedure is developed in this paper. Altogether 5 levels are included in this procedure. Level 0 is optimization of hull dimensions based on the method of experience or statistical formulae. Levels 1, 2 and 3 are optimizations of naked hull lines, local hull lines and appendage lines respectively. The method of Navier-Stokes equations is used with thick-layer approximation and integral numerical approach for Level 1, with thick-layer approximation and differential numerical approach for Level 2, and with partly-parabolic approximation and differential numerical approach for Level 3. Level 4 is optimization of finalized hull lines by using model test with flow field measurements. The practical design of ship hull has shown that CFD code is applicable for optimization of ship hull lines in the view of hull resistance performance.