基于三维粒子图像测速技术的艉流场试验  

Experimental investigation of ship stern flow field through Stereo-PIV

作　　者：佘文轩 周广利[1] 吴铁成[1] 张东汗 振前 SHE Wenxuan;ZHOU Guangli;WU Tiecheng;ZHANG Donghan;ZHEN Qian(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]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》2019年第1期26-33,共8页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51209048;41176074;51409063);工信部高技术船舶科研项目(G014613002)

摘　　要：为了解决船舶艉部流场复杂流动机理认知困难的问题,本文依托哈尔滨工程大学船模水池实验室拖曳水池中的大型水下三维粒子图像测速系统,以具有槽道U型船艉的某型号单桨商船缩比模型为研究对象,对设计工况下不同截面处的船舶艉流场进行测量。测量结果展现了舭涡、螺旋桨毂帽涡以及"钩状"速度等值线等流动结构。同时对不同截面位置处的船舶艉流场进行了3方向速度、涡旋强度以及涡量等对比分析。分析结果表明:与一般U型艉肥大型船舶艉流场相比,具有槽道U型船艉流场在其结构形式中同样具有强烈的船艉舭涡和"钩状"速度等值线。但是其船艉舭涡和"钩状"结构有明显的向船中收缩趋势,受船中向内的凹陷船体表面影响,具有明显的边界层流场收缩现象。This study aims to understand the complex flow mechanism of ship wake filed.A stereoscopic particle image velocimetry(SPIV)system is established in the tank pool of Harbin Engineering University.The shrinkage ratio model of a single-propeller merchant ship with U-shaped stern is used as the study object to measure the stern flow field of the ship at different sections under the design conditions.Measurement results clearly show the flow structure of bilge vortex,propeller hub cap,and“hook”velocity contours.The three-dimensional velocity,vortex strength,and vorticity of the ship′s stern flow field at different cross-section positions are also compared and analyzed.Compared with the U-shaped aft wake flow field,the U-shaped stern with a channel flow field in its structure has stronger aft vortex and“hook”speed contour.However,the stern vortex and the“hook-like”structure exhibit obvious inward shrinkage tendency.The boundary layer flow field shrinks due to the effect of the hull surface with inward depression.

关 键 词：三维粒子图像测速系统 船舶艉流场 舭涡 毂帽涡 槽道U型船艉 涡旋强度 涡量 

分 类 号：U661.1[交通运输工程—船舶及航道工程]