CAJ | 학술논문

文章发展了一种预报吊舱推进器非定常水动力性能的数值方法。该方法分别基于涡格法和面元法对螺旋桨叶片和吊舱进行计算。螺旋桨工作在船体和吊舱包后的非均匀来流中，其对吊舱包和支架的非定常诱导速度在文中进行了时均处理。用该数值方法分别预报了有无船体情况下的四叶桨吊舱推进器水动力性能，并通过与空泡水筒的推力、扭矩实验数据相比较，验证了数值方法的有效性。该文还基于数值结果讨论了吊舱对于螺旋桨非定常力和力矩的影响，说明吊舱包-支架单元所诱导的伴流对螺旋桨受力是有较大影响的。
문장발전료일충예보조창추진기비정상수동력성능적수치방법。해방법분별기우와격법화면원법대라선장협편화조창진행계산。라선장공작재선체화조창포후적비균균래류중，기대조창포화지가적비정상유도속도재문중진행료시균처리。용해수치방법분별예보료유무선체정황하적사협장조창추진기수동력성능，병통과여공포수통적추력、뉴구실험수거상비교，험증료수치방법적유효성。해문환기우수치결과토론료조창대우라선장비정상력화력구적영향，설명조창포-지가단원소유도적반류대라선장수력시유교대영향적。
A numerical method was developed for predicting the unsteady hydrodynamic forces act-ing upon a propeller mounted on a pod. The method is based on a vortex lattice method for the pro-peller blades and a surface panel method for the pod. The unsteady velocities induced by propeller blades are time-averaged at the control points on the pod surface, while the propeller is considered to operate in a spatially inhomogeneous inflow due to the presence of the pod and the hull. Numerical computations are carried out for a 4-bladed propeller mounted on a pod, without and with the hull. The steady thrust and torque measured in a cavitation tunnel are used to partly validate the present method. The effect of pod on unsteady propeller forces and moments is discussed based on numeri-cal results. The results indicate that the effect of the pod-strut unit ’s effective wake is significant.