摘要
采用对比性数值分析方法研究高速气泡船减阻效果,针对某优良过渡型艇,为喷气需要预先进行断阶,不计自由面影响,采用有限体积法和SIMPLE算法,湍流模型为k-ε两方程,耦合求解N-S方程和连续性方程,数值分析不同离散格式、不同网格数量对艇体在不喷气状态下遭受的粘性阻力影响。计算结果显示:二阶迎风格式比一阶迎风格式数值结果与试验结果符合较好;网格数量达到95万,计算结果与试验结果符合较好。
The resistance reduction of high speed air cavity craft was analyzed by using contrastive numerical method. Neglecting the influences of free-surface, choosing k-ε viscous model, the Finite Volume method and SIMPLE algorithm were adopted to solve the N S equation and the continuity equation of a transitional craft with good line-type. The influence of discretization scheme and grid number on viscosity resistance without injecting air was studied numerically. The results showed that the calculation by second order upwind is more similar to towing tank test results than by first-order upwind.
出处
《船海工程》
2009年第4期9-12,共4页
Ship & Ocean Engineering
基金
国家863项目(2006AA11Z223)
关键词
断阶过渡型艇
离散格式
网格数量
粘性阻力
数值计算
dam-break transitional craft
discretization scheme
mesh number
viscosity resisitance
numerical caleulation
