基于阻力性能船体型线精细优化的CFD方法

根据基于阻力性能的船体型线优化方法的不同,在船舶设计中可以归纳成5个相应水平的优化程序。总结了基于经验或统计公式的船体尺度优化（零水平优化）,应用CFD方法分别对裸船体型线、局部船体型线和附体型线进行的精细优化（1,2,3水平优化）,以及通过模型试验完成的船体型线的最终优化（4水平优化）的研究成果。所采用的CDF方法分别为用厚边界层近似与积分方法、厚边界层近似与差分法以及部分抛物线近似与差分法求解N－S方程。4水平则是通过包括流场测量信息的模型阻力试验进行最终的型线优化。

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

In order to complete the fine optimization of the ship hull lines, a classified optimization procedure is developed in this paper. 5|Level is included for this procedure such as the optimization of the dimensional form, overall form, local form, appendage form, and finalizing form. The method of experience or statistical formulae, the approach of Navier|Stokes equations with thick|layer approximation and integral numerical approach, with 2|turbulence model and linear free surface boundary condition by means of differential numerical approach in the time domain, with partly|parabolic approximation and differential numerical approach, and the model test with flow field measurements are applied to the above different level optimization respectively. The practical design of the ship hull has shown that this CFD code is available for optimization of ship hull lines in the view of hull resistance performance.