过渡型艇微气泡减阻喷缝尺度影响数值计算(英文)  

Numerical Calculation on the Influence of the Slot Size of Air Injection on Micro Bubbles Drag Reductionfor Transitional Craft

作　　者：王家楣[1] 张玲[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063

出　　处：《船舶力学》2011年第6期592-597,共6页Journal of Ship Mechanics

基　　金：Supported by'Type research of High Speed Air Bubble Ship'of the State863project(2002AA335050);'The Experimental Study on Drag Reduction by Leading Edge Holes and Micro-bubble'of NSFC(10972167)

摘　　要：针对一优良过渡型艇,为喷气需要进行船底断阶,采用有限体积法、SIMPLEC算法和k-ε两方程湍流模型,不计自由面影响,计及气泡与水的相对运动,数值求解包含气液两相流的雷诺平均控制方程组。获得不同喷缝宽度、不同傅汝德数和相对喷气速度下的船舶的阻力特性和气泡浓度分布规律并与模型实验结果进行对比分析。结果显示:在获得高减阻率条件下,Cn随Fr增加而呈非线性增加,当Fr=0.779时,Cn达到最大值;在获得25%减阻率的条件下,Fr=0.973时相对喷缝宽度为0.112所需喷气量最小即喷气所消耗功率最小。计算结果可为高速气泡船喷缝参数设计提供参考。The two-phase flow around a fine transitional with step for injecting air is figured out numerically under the condition of neglecting influences of free-surface.The drag characteristic of the ship and the distribution of the volume fraction of micro bubble are got at different air jet slot size,Fr and relative air injection velocity.The results show that at C =25% and F =0.973,the air flow rate could reach minimum if non-dimension jet slot size is 0.112.The calculation result will provide reference on the parametric design of air injection slot of High-Speed Air Cavity Craft.

关 键 词：过渡型艇 断阶 微气泡减阻 喷缝宽度 数值计算 

分 类 号：U661.311[交通运输工程—船舶及航道工程]