三体船阻力计算的改进方法研究  

Discussion of methods for improving resistance calculation of trimaran hulls

作　　者：陈康[1,2] 黄德波[2] 李云波[2] 

机构地区：[1]上海船舶研究设计院,上海200032 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2009年第2期126-131,共6页Journal of Harbin Engineering University

摘　　要：为了提高三体船的阻力计算精度,采用CFD技术分析了网格、湍流模型、对流项离散格式等3个因素对三体船阻力性能计算的影响,探讨了开展网格收敛研究、运用网格自适应技术、选取适用的湍流模型及对流项离散格式等措施来改进三体船阻力性能预报的可行性.研究表明,分别从网格、湍流模型及对流项离散格式等角度改进三体船阻力性能预报的难度极大,并且收效不明显.由于各种因素导致的模拟误差无法完全避免,基于各因素导致的误差及偏差在一定程度上能够相互抵消的想法提出一种改进三体船模型阻力性能预报的方法,计算结果及验证研究表明该方法能够改进三体船模型的阻力计算.In order to improve the accuracy of calculations of a trimaran＇sull resistance, effects of errors and uncertainties caused by grid structure, turbulence models, and advection schemes on the calculation of a trimaran＇sull resistance were studied with viscous computational fluid dynamic （CFD）. Attempts were made to analyze the feasibility of improving calculations of resistance performance of trimarans by improving grid quality, by choosing appropriate turbulence models, or by advection schemes. The analysis showed that it＇s hard to improve predictions of resistance performance of trimaran hulls by separately improving grid quality, improving the choice of the appropriate turbulence model, or impro- ving the advection scheme. On the premise that simulation errors and uncertainties could not be avoided using present numerical methods, a new method based on a degree of error cancellation was brought up that should improve predictions of the resistance performance of trimaran hulls. Calculations in the validating study showed this method might improve resistance calculations for trimaran models with complex configurations.

关 键 词：三体船阻力计算 网格生成 湍流模型 对流项离散格式 误差抵消 

分 类 号：U661.338[交通运输工程—船舶及航道工程]