CFD analysis of propeller tip vortex cavitation in ship wake field
CFD analysis of propeller tip vortex cavitation in ship wake field
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船舶尾流场螺旋桨叶尖涡空化CFD分析
DOI：
10.1115/1.861851_ch47
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
P. Andersen
中科院分区：
文献类型：
--
作者：
Keun Woo Shin;P. Andersen
船舶螺旋桨在船体后状态下的TVC是一个具有挑战性的数值预测问题，因为它在与船体尾流、螺旋桨诱导流和方向舵扰动的湍流粘性相互作用下发生变形。用于军用舰船螺旋桨和方向舵在非均匀尾流中轴倾角为3.5°的空化流。空化隧道试验显示TVC延伸到方向舵上，而初始网格上的DES只复制了一小部分TVC。经过基于q准则的自适应网格细化后，模拟的TVC范围更大，螺旋桨上方两点的一阶和二阶压力脉冲更接近实验测量值。通过q准则等面识别的螺旋轨迹变形，分析了船体尾流、螺旋桨诱导流、方向舵扰动和轴倾角对TVC的影响。
TVC on marine propellers in behind-hull conditions is a challenging problem for numerical predictions, because it is deformed in turbulent viscous interactions with hull wake, propeller-induced flows and rudder disturbance. DES is made for cavitating flows on a propeller and a rudder of a military vessel with a 3.5° shaft inclination in non-uniform hull wake. While a cavitation tunnel test shows TVC extending over the rudder, only a short extent of TVC is reproduced in DES on the initial grid. After an adaptive grid refinement based on the Q-criterion, a larger extent of TVC is simulated and the firstand second-order pressure pulses on two points above the propeller are closer to the experimental measurements. The effects of hull wake, propeller-induced flow, rudder disturbance and shaft inclination on TVC are analyzed by looking into the deformation of the helical trajectory identified by a Q-criterion iso-surface.