摘要
通过数值模拟对摆线推进器水动力性能进行研究.分析摆线推进器流场特性、瞬时荷载变化规律及转向性能.采用重叠网格与滑移网格方法相结合进行网格划分,选择合适的湍流模型计算摆线推进器水动力性能,并与试验值进行对比,验证数值模拟的有效性与准确性.通过数值模拟得到了进速系数与偏心率对摆线推进器水动力性能的影响规律和摆线推进器瞬时荷载变化规律.在此基础上,对偏心角不为0°的摆线推进器进行研究,获得了偏心角对摆线推进器推力的影响规律.结果表明,摆线推进器可以通过改变偏心率改变推力大小,在不改变旋转方向的情况下通过改变偏心角改变推力方向.进速系数为零时,摆线推进器产生合力方向与前进方向夹角等于偏心角;进速系数对摆线推进器合力大小和方向均会产生影响,进速系数越大,前进方向推力越小,合力角度与偏心角差值越大.
The hydrodynamic performance of cycloidal propeller is studied by numerical simulation.The flow field characteristics,instantaneous load variation law and steering performance of cycloidal propeller are analyzed.The overlapping grid and sliding grid methods are combined for meshing.An appropriate turbulence model is selected to calculate the hydrodynamic performance of cycloidal propeller.The numerical simulation is verified for validity and accuracy by comparing with test data.Through numerical simulation,the influence law of advance coefficient and eccentricity ratio on the hydrodynamic performance of cycloidal propeller and the change law of the instantaneous load of cycloidal propeller are obtained.On this basis,the cycloidal propeller with non-zero degree eccentric angle is studied,and the influence law of eccentric angle on the thrust of cycloidal propeller is obtained.The results show that the cycloidal propeller can change the thrust magnitude by changing the eccentricity ratio,and change the thrust direction by changing the eccentric angle without changing the rotation direction.When the advance coefficient is zero,the angle between the resultant force direction and the forward direction of the cycloidal propeller is equal to the eccentric angle.The advance coefficient affects the magnitude and direction of the resultant force of the cycloidal propeller.The greater the advance coefficient,the smaller the thrust in the forward direction,and the greater the difference between the resultant force angle and the eccentric angle.
作者
李海涛
王代斌
LI Haitao;WANG Daibin(School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《大连理工大学学报》
CAS
CSCD
北大核心
2024年第2期173-181,共9页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(51979032).
关键词
摆线推进器
数值模拟
重叠网格
水动力性能
偏心角
操纵性能
cycloidal propeller
numerical simulation
overlapping grid
hydrodynamic performance
eccentric angle
maneuverability
作者简介
李海涛(1976—),男,博士,高级工程师,硕士生导师,E-mail:liht@dlut.edu.cn;王代斌(1997—),男,硕士生,E-mail:wk18243228342@163.com.
