摘要
针对库存大侧斜桨,基于商用RANS代码,利用结构化网格技术和流道计算模型开展了大侧斜桨敞水水动力和流场的数值分析。在进速系数J∈∈0.3 3,0.95∈范围内,文中计算得到的敞水螺旋桨水动力与试验结果差异在3%以内。通过敞水螺旋桨流场计算和计及粘性影响鼓动盘计算结果比较可知,螺旋桨对桨前流场影响主要是抽吸作用;对桨后近场区域X/Dp<4流场影响主要是滑流,轴向速度周向均值沿径向分布主要受桨叶负荷分布控制;到中间区域4<X/Dp<15,旋转尾流加速了轴向速度沿纵向的衰减,但增大了沿径向的扩散范围;至充分发展尾流区X/Dp>15,螺旋桨尾流变成了单一的剪切流。
Using the structured-grid technology and the flow model around one blade passage,the hydro-dynamic performance and wake characteristics of the high-skew stock propeller were numerically analyzed with commercial RANS methods.Among the advanced ratio J 0.33 to 0.95,the differences between the CFD results and experiments about the open-water performance are within 3%.Through the comparison of the flow fields around the propeller computed by CFD and the actuator-disk theory with viscous effect,it is in-dicated that： the effect of propeller suction occurs in front of the propeller;in the near field,X/Dp4,be-hind the propeller,the effect of the propeller is confined to the slipstream,and the circumferentially-aver-aged axial velocity profiles along the radial direction mainly depend on the propeller loading conditions;in the intermediate region,4X/Dp15,the swirling wake brings the axial high-speed velocity a more quickly decay along the lognitudinal direction and a larger region in the radial direction;in the developed wake,X/Dp15,there results in a single shear flow.
出处
《船舶力学》
EI
北大核心
2010年第8期854-862,共9页
Journal of Ship Mechanics
关键词
大侧斜桨
敞水性能
尾流场
数值模拟
high-skew propeller
open-water performance
flow fields
numerical simualtion
