摆线桨非定常动态失速的三维效应  

Three-dimensional effect of unsteady dynamic stall of cycloidal propeller

作　　者：曾嘉楠 朱清华[1] 申遂愿 陈建炜 王坤[1] 丁正原 ZENG Jianan;ZHU Qinhua;SHEN Suiyuan;CHEN Jianwei;WANG Kun;DING Zhengyuan(National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics,College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学航空学院直升机旋翼动力学国家级重点实验室

出　　处：《航空动力学报》2019年第12期2599-2607,共9页Journal of Aerospace Power

基　　金：江苏省高校优势学科建设工程

摘　　要：对摆线桨三维全尺寸模型进行了非定常数值模拟。验证了两种嵌套网格方法的可靠性与适用性,针对二维/三维情况下摆线桨非定常涡流动特性及诱导分离特性开展了数值分析,重点研究了展向气动力随方位角的分布与全局流场的诱导速度分布,并分析了尾迹捕捉精度与涡量耗散特征。结果表明:受摆线桨切向速度、展向诱导速度等三维效应影响,两种计算结果的瞬态气动力极值差值达到44%。三维动态失速涡的产生、脱落与再附明显弱于二维翼型情况,这对于摆线桨非定常气动特性有较大影响。The reliability and applicability of two overset mesh methods were verified・Then numerical analysis of the unsteady vortex flow and induced separation characteristics of cycloidal propeller in the two-/three-dimensional cases was carried out,laying the foundation for studying the distribution of spanwise aerodynamics with azimuth and the induced velocity distribution of the global flow field,meanwhile the wake capture accuracy and vorticity dissipation characteristics were also analyzed.Results showed that,under the influence of threedimensional effects such as tangential velocity and spanwise induced velocity of cycloidal propeller,the difference of transient aerodynamic extremum between the two calculation results reached 44%.The generation,shedding and reattachment of three-dimensional dynamic stall vortices were obviously weaker than two-dimensional airfoil,yielding a great impact on the unsteady aerodynamic characteristics of cycloidal propeller.

关 键 词：运动嵌套网格 三维非定常效应 气动特性 摆线桨流场 动态失速 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]