三种艉部附体方案的粘性阻力数值计算

水面船舶艉部附体不但影响船舶的阻力,而且对螺旋桨的伴流分数以及推力减额也会产生较大影响。近年来,越来越多的研究者都重视使用数值方法进行船舶附体优化设计。在分析某排水型水面船舶艉部附体特点以及优化目标后,设计出两套艉部附体优化方案。通过数值计算方法对这3种方案的船体带附体模型在不同雷诺数条件下进行三维粘性流场的数值模拟。分析比较了它们的粘性阻力和螺旋桨桨盘面处的伴流,最后得到双尾鳍附件的最优方案。

Numerical calculation of viscous resistance in three different stern appendage cases

The stern appendages of a surface ship have great effect not only on the resistance, but also on the wake fraction and thrust deduction fraction. Recently, more and more researches of appendages optimization focus on the numerical method. Two optimum stern appendage cases were proposed after the analysis of the characteristics of the stern appendages of a surface ship and the objective of the optimization. Numerical calculations of the 3D viscous flow field in the model with full appendages were made in different Reynolds. An optimum twin skeg case was gained on the basis of the analysis and comparison of the resistance and the wake fraction on the propeller blade.