摘要
复合材料可改善螺旋桨空化性能及振动特性,在先进海洋推进装备领域备受关注。本文基于URANS计算复合材料螺旋桨外流场,应用FEM求解桨叶结构动态响应,并将水动力载荷及结构变形实时双向传递,建立复合材料螺旋桨非定常空化流固耦合数值计算方法。精细地模拟了桨叶经过高伴流区过程中叶梢空泡的演化;叶梢最大变形量随着叶梢空泡的初生、发展而逐渐增大,在梢涡空泡形成阶段达到最大值,然后随着空泡的溃灭而减小;揭示了复合材料的应用使螺旋桨推进效率得以提高、叶梢空化得以抑制的机理,即复合材料螺旋桨在空化水动力载荷作用下产生弯扭耦合变形,自适应地调整攻角以抑制空泡发展;对比了典型空化工况下复合材料与刚性金属螺旋桨空化水动力性能的区别;与刚性金属桨相比,复合材料螺旋桨的压力脉动峰值缓和,对非均匀伴流场的适应性更好。
As the application of composite materials can improve the cavitation performance and vibration characteristics of propellers,it has been widely concerned in the field of advanced marine propulsion equip⁃ment.In this paper,the flow field of a composite material propeller was calculated based on URANS,the dy⁃namic response of the blade structure was solved by FEM,and the hydrodynamic load and structural deforma⁃tion were transmitted in real time bi-directionally.The simulation of the evolution of tip cavitation in the high wake region shows that the maximum tip deformation increases with the initiation and development of tip cavitation,reaches the maximum at the stage of tip vortex cavitation formation,and then decreases with the collapse of bubbles.The mechanism of the improvement of propeller propulsive efficiency and the sup⁃pression of tip cavitation due to the application of composite materials was revealed,indicating that the com⁃posite material propeller produces bending torsion coupling deformation under cavitation hydrodynamic load,and adaptively adjusts the angle of attack to suppress cavitation development.Comparison of the cavitation performance between the composite material propeller and the rigid propeller under typical cavitation condi⁃tion reveals that the composite material propeller has a mild peak pressure fluctuation and a better adaptabili⁃ty to the non-uniform wake.
作者
张晶
张晨星
王惠
梁欣欣
吴钦
ZHANG Jing;ZHANG Cheng-xing;WANG Hui;LIANG Xin-xin;WU Qin(Beijing Institute of Astronautical System Engineering,Beijing 100076,China;School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《船舶力学》
EI
CSCD
北大核心
2024年第3期341-353,共13页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目(3172029
51839001
U20B2004)。
关键词
螺旋桨
非定常空化
水动力性能
流固耦合
复合材料
propeller
unsteady cavitation
hydrodynamic performance
fluid-structure interaction
composite material
作者简介
通讯作者:张晶(1996-),男,硕士,工程师,E-mail:18210058286@163.com。
