基于高斯近似和NSGA-Ⅱ的伴流螺旋桨优化  

Optimization of wake propeller based on Gaussian approximation and NSGA-II

作　　者：刘旭[1] 姚强 朱成华 杨鹄[4] LIU Xu;YAO Qiang;ZHU Chenghua;YANG Hu(Bohai Shipbuilding Vocational College,Huludao 125101,China;Research Institute of Comprehensive Technology and Economics,CSSC,Beijing 100081,China;School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Wuhan Institute of Shipbuilding Technology,Wuhan 430050,China)

机构地区：[1]渤海船舶职业学院,辽宁葫芦岛125101 [2]中国船舶集团有限公司综合技术经济研究院,北京100081 [3]华中科技大学船舶与海洋工程学院,湖北武汉430074 [4]武汉船舶职业技术学院,湖北武汉430050

出　　处：《中国舰船研究》2023年第4期197-205,共9页Chinese Journal of Ship Research

基　　金：国家重点研发计划战略性国际科技创新合作重点专项基金资助项目(2016YFE0202700);国家自然科学基金资助项目(51975459)。

摘　　要：[目的]为改进船舶推进性能,提高船舶效能,克服螺旋桨参数众多、建模繁琐、水动力数值计算收敛速度慢、伴流场的湍流效应等问题,提出一套螺旋桨高效优化方法。[方法]首先,将基于非均匀有理B样条的自由曲面变形(NFFD)技术构建的参数化螺旋桨作为输出,利用CFD数值仿真对螺旋桨性能特征进行预报。然后,基于仿真数据建立螺旋桨性能高斯近似预测模型,建立以提高效率、降低扭矩系数为目标的优化模型,利用二代非支配排序遗传算法(NSGA-Ⅱ)得到最优解。[结果]结果显示,在均匀流场和船后伴流场下,螺旋桨的优化结果有着相似规律,即桨叶宽度和厚度均呈减小的趋势,倾斜角呈增大趋势,但由于在船后伴流场下流速会降低,因而桨叶宽度和厚度的减小以及倾斜角的增加幅度相对于均匀流场下的小。[结论]采用所构建的方法可以实现均匀流场和船后伴流场下螺旋桨的高效优化设计。[Objectives]In order to improve ship propulsion performance and efficiency,and overcome such obstacles as numerous propeller parameters,complicated modeling,slow convergence of hydrodynamic nu-merical calculations and turbulent wake field effects,this paper proposes an efficient propeller optimization method.[Methods]A parameterized propeller constructed with non-uniform rational B-spline based free form deformation(NFFD)technology is used as the output.The CFD numerical simulation is applied to pre-dict its performance characteristics and the Gaussian approximate prediction model of the propeller perform-ance is established based on the simulation data.The optimization model aims to improve efficiency and re-duce the torque coefficient by using the second-generation non-dominated sorting genetic algorithm(NSGA-II)method to obtain the optimal solution.[Results]The results show that under the uniform flow field and wake field behind the ship,the optimization results of the propeller have similar laws;that is,the blade width and thickness of the propeller show a decreasing trend,while the inclination angle shows an increasing trend.The flow velocity decreases in the wake field behind the ship,so the reduction in width and thickness and in-crease in inclination angle of the propeller blade are smaller than those in the uniform flow field.[Conclusion]The method proposed in this paper can be used to achieve the more efficient optimization design of propellers under uniform flow fields and wake fields behind ships.

关 键 词：螺旋桨 均匀流场 适伴流螺旋桨 多目标优化 高斯近似 NSGA-Ⅱ 

分 类 号：U664.33[交通运输工程—船舶及航道工程]