摘要
论文以某76000 DWT巴拿马散货船的缩比模型为研究对象,应用粒子图像测速(ParticleImage Velocimetry,简称PIV)技术对设计吃水与压载吃水装载状态下船舶的标称伴流场进行了测量,测量结果精细的展现了舭涡、假毂毂帽涡以及"钩状"速度等值线结构,其流场特性与KVLCC,JBC等U型艉肥大型船舶艉流场特性符合。最后,对设计吃水与压载吃水工况下船舶标称伴流场进行了轴向速度分布,速度矢量分布、旋涡强度、涡量以及流线等对比分析。结果表明:桨盘面内流场受船舶装载状态影响较大,外流场区域受装载状况影响较弱。设计吃水状态下螺旋桨盘面舭涡呈现"圆形"而压载吃水状态呈现为"耳形"且设计吃水状态涡量较大。另外,不同装载状态下舭涡与假毂毂帽涡的旋涡中心不同。
Towing DANTEC PIV system is applied to measure nominal wake field of a 76000 DWT Panmax Bulker in open water.Bilge vortex,propeller cap vortex and hook-shaped velocity contour are observed precisely.It is shown that characteristics of the flow field are in accordance with that of the stern flow field of an U-huge ship,such as KVLCC and JBC.Axial velocity distribution,velocity vector distribution,rotational strength,vorticity and streamlines are analyzed under both designed and ballast draft conditions.It is shown that wake flow near the propeller disk is greatly affected by loading conditions of the ship,but outflow field is less affected.Bilge vortex at the propeller disk presents circle-shape under designed draft condition and presents eared-shape under ballast draft condition.
作者
吴铁成
郭春雨
骆婉珍
赵大刚
佘文轩
WU Tiecheng;GUO Chunyu;LUO Wanzhen;ZHAO Dagang;SHE Wenxuan(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《中国造船》
EI
CSCD
北大核心
2018年第3期98-107,共10页
Shipbuilding of China
基金
自然科学基金(51639004
51379043)
装备预先研究项目(41407010501)
工信部高技术船舶科研项目(G014613002)
哈尔滨工程大学青年骨干教师支持计划(HEUCFQ1408)资助项目
关键词
PIV测量技术
标称伴流场
压载吃水
舭涡
毂帽涡
PIV measuring technology
nominal wake
ballast draft condition
bilge vortex
propeller cap vortex
