基于CFD耦合DEM并行算法的旋翼飞行器桨叶沙盲现象模拟分析  

Simulation Analysis to Sand Blindness of Rotorcraft Blades Based on Coupled CFD-DEM Parallel Algorithm

作　　者：文韬[1,2] 程党根[1] WEN Tao;CHENG Danggen(Aviation Electromechanical Equipment Maintenance Department,Changsha Aeronautical Vocational and Technical College,Changsha 410124,China;Hunan Aircraft Maintenance Engineering Technology Research Center,Airforce Aviation Repair Institute of Technology,Changsha 410124,China)

机构地区：[1]长沙航空职业技术学院航空机电设备维修学院,长沙410124 [2]空军航空维修技术学院湖南省飞机维修工程技术研究中心,长沙410124

出　　处：《航空工程进展》2021年第3期71-77,共7页Advances in Aeronautical Science and Engineering

基　　金：空军装备修理科研项目(DW-70-2017);湖南省教育厅科研项目(17C0012)。

摘　　要：旋翼飞行器处于地效(IGE)悬停状态易吸入沙尘从而引起沙盲现象。为了研究出现沙盲现象时的悬停流场与沙尘的运动规律,采用基于雷诺平均N-S方程及k-ω(SST)湍流模型,结合计算流体力学(CFD)与离散元(DEM)耦合并行算法,使用Fluent软件进行流场连续相计算;通过API传递流场信息至离散相,计算直升机旋翼的悬停流场,并与可得到的PIV测量结果进行对比;再将流场动量数据传输给离散相,计算沙尘的完整运动轨迹和颗粒分布。结果表明:在对流场精确模拟的同时,采用离散元方法对沙尘颗粒受力运动以及空间分布较好地模拟,能够多参数化地了解地效流场和细微沙尘颗粒受力运动规律,直观呈现沙盲的发展过程。In order to study the hovering flow field and sand dust movement law of a rotorcraft in ground effect(IGE)hovering due to sand dust inhalation,Fluent software was used to calculate the flow field continuously based on Reynolds averaged N-S equation and k-ω(SST)turbulence model,combined with the parallel algorithm of CFD(Computational Fluid Dynamics)and DEM(Discrete Element Method).Through API(Application Pro⁃gramming Interface),the hovering flow field of helicopter rotor is calculated and compared with the PIV(Particle Image Velocimetry)measurement results.After that,the momentum data of flow field is transmitted to discrete phase to calculate the complete trajectory and particle distribution of dust.The results show that:when the convec⁃tion field is accurately simulated,the force movement and spatial distribution of sand dust particles are well simulat⁃ed by using the discrete element method,which can understand the ground effect flow field and the force movement law of fine dust particles with multi parameters,and directly present the development process of sand blindness.

关 键 词：沙盲 两相流 耦合算法 CFD-DEM 桨叶 

分 类 号：V212.4[航空宇航科学与技术—航空宇航推进理论与工程]