风-浪-舰耦合对舰船尾流场及直升机气动的影响  

Effects of wind-wave-ship coupling on ship airwake and helicopter aerodynamics

作　　者：胡嘉讯 宗昆 史勇杰[1] 徐国华[1] 赵靖涛 HU Jiaxun;ZONG Kun;SHI Yongjie;XU Guohua;ZHAO Jingtao(National Key Laboratory of Rotorcraft Aeromechanics,NUAA,Nanjing 210016,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;Systems Engineering Research Institute,CSSC,Beijing 100094,China)

机构地区：[1]南京航空航天大学、直升机旋翼动力学国家级重点实验室,江苏南京210016 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001 [3]中国船舶工业系统工程研究院,北京100094

出　　处：《飞行力学》2023年第2期47-53,共7页Flight Dynamics

基　　金：国家自然科学基金资助(11982190)。

摘　　要：为研究波浪和舰船运动对高海况下舰载直升机起降的影响,建立了一套耦合风-浪-舰和直升机的多相流数值模拟方法。使用动态流体作用模拟舰船运动,采用动量源方法模拟直升机旋翼,对3~6级海况下ONRT舰船摇荡运动时的尾流场非定常气动特性进行了研究,并计算了UH-60A直升机旋翼气动载荷的时间历程。研究表明:6级海况下流场速度分量和旋翼气动载荷的波动达到5级海况的2倍,而3~5级海况之间的差别较小;悬停跟进时直升机不断出没于舰船运动导致的尾流中速度和涡量不同的区域,使得旋翼气动载荷有极强的非定常特性;在6级海况下,旋翼拉力与波浪-舰船耦合运动同周期的波动达到20%,并伴随着穿越尾流剪切层时产生的5~10 Hz的小扰动。To research on the effects of waves and ship motions on shipborne helicopter,a numerical simulation method of multiphase flow coupled by the wind,wave,ship and helicopter was developed.The ship motions were simulated by the dynamic fluid interaction module,and the helicopter rotor was simulated by the momentum source approach.The unsteady aerodynamic characteristics of the ONRT ship airwake while pitching and heaving at sea state 3~6 were studied,and the time history of the UH-60A helicopter rotor thrust and pitch moment was calculated.It is shown that the fluctuations of velocity components and rotor airloads of sea state 6 are up to 2 times that of the sea state 5,while there are less differences among sea state 3~5.The rotor airloads present strong unsteady characteristics when the hovering rotor constantly crosses over areas with different velocities and vorticities.At sea state 6,there are 20%rotor thrust fluctuations with the same period as ship motions and 5~10 Hz perturbations due to the swinging separated shear layer.

关 键 词：舰载直升机 舰船空气流场 计算流体力学 多相流 舰船运动 

分 类 号：V275.1[航空宇航科学与技术—飞行器设计] U674.7[交通运输工程—船舶及航道工程]