襟翼缝隙对风帆船气动性能的影响  

Research on the Influence of Flap Gap on Aerodynamic Performance of Wind Sailboat

作　　者：王宪辉 管殿柱[1] 邓皓云 李森茂 季建华 WANG Xianhui;GUAN Dianzhu;DENG Haoyun;LI Senmao;JI Jianhua(Qingdao University,Qingdao Shandong 266071,China)

机构地区：[1]青岛大学机电工程学院,山东青岛266071

出　　处：《机械设计与研究》2023年第1期202-207,213,共7页Machine Design And Research

基　　金：国家重点研发计划资助项目(2017YFC140510)。

摘　　要：为推进无人帆船在海洋数据收集和生态保护方面的应用,针对某型无人帆船设计一款带嵌入式襟翼帆的风帆系统,并对翼缝对风帆气动性能的影响进行研究。首先建立无襟翼帆以及翼缝宽分别为主翼帆弦长0‰、1‰、2‰、3‰和4‰的六种风帆模型,用Fluent软件进行CFD仿真计算,分析不同翼缝下的襟翼帆翼面周围的压力和流场分布情况;并对六种风帆在多攻角和多襟翼帆偏转角下的升阻力特性进行比较分析;研究不同相对风向角下翼缝大小对无人帆船推力特性的影响。结果表明:襟翼帆的存在提高了无人帆船风帆的气动性能和无人帆船的推力特性。在一定攻角范围内,翼缝使带襟翼帆的翼型升力系数和升阻比减小、阻力系数提高、无人帆船的推力系数降低和侧推力系数提高;随着缝隙的增大,升阻力系数和升阻比变化的幅值增大;随着攻角的增大,翼缝大小对主翼帆升阻力特性的影响幅值减小;随着襟翼帆偏转角的增大,翼缝大小对主翼帆升阻比特性的影响幅值减小。In order to promote the application of unmanned sailing boats in marine data collection and ecological protection,this paper designs a sail system with embedded flap sails for a certain type of unmanned sailboat,and investigates the influence of wing slits on the aerodynamic performance of the airfoil.First,six sail models with flapless sails and wing slit widths of 0‰,1‰,2‰,3‰,and 4‰of the chord length of the main wing are established,respectively.Fluent software is used to perform CFD simulation calculations and analyze the pressure and flow field distribution around the wing surface of the flapped sail under different wing slits.The lift and drag characteristics of the six sails at multiple angles of attack and deflection angles of multiple flaps are compared and anlayzed.The effect of the size of the wing slits under different relative wind angles on the thrust characteristics of unmanned sailboats is studied.The results show that the existence of flap sails improves the aerodynamic performance of unmanned sailing sails and the thrust characteristics of unmanned sailing sails.Within a certain range of angle of attack,the wing slit reduces the lift coefficient and lift-drag ratio of the airfoil with flapped sails,increases the drag coefficient,decreases the thrust coefficient of the unmanned sailboat,and increases the side thrust coefficient;as the gap increases,the amplitude of the change in lift-drag coefficient and lift-drag ratio increases;with the increase of the angle of attack,the magnitude of the influence of the size of the wing slit on the lift-drag characteristics of the main wing sail decreases;with the increase in the deflection angle of the flap sail,the influence of the size of the wing slit on the lift-drag ratio of the main wing is reduced.

关 键 词：无人帆船 襟翼帆 翼缝 CFD 推力系数 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程] TH69[机械工程—机械制造及自动化]