涵道唇口对共轴双旋翼气动特性的影响  

Influence of Ducted Lips on Aerodynamic Characteristics of Coaxial Rotor

作　　者：杨加明[1] 戴良忠[1] 冯立华[1] 王旭[1] 

机构地区：[1]南昌航空大学飞行器工程学院,南昌330063

出　　处：《系统仿真学报》2014年第4期744-748,共5页Journal of System Simulation

基　　金：国家自然科学基金项目(11102079);航空科学基金项目(2012ZA56001)

摘　　要：涵道本体对于提高飞行器整体拉力起着显著作用。单旋翼和共轴双旋翼高速旋转时在涵道唇口产生绕流,形成低压区,使涵道本体产生附加拉力。基于有限体积法,研究涵道唇口对单旋翼和共轴双旋翼的影响。分析表明,涵道唇口对单旋翼以及共轴双旋的气动特性产生强烈影响,单旋翼产生的拉力随着唇口半径的逐渐增大而增大。对于共轴双旋翼,唇口半径的变化在一定程度上改变上下旋翼拉力分配,使得上旋翼拉力逐渐增大,下旋翼拉力逐渐减小。当半径无限增大,涵道共轴双旋翼机构趋同于共轴双旋翼机构,计算结果也表明,其上下旋翼拉力分配关系与共轴双旋翼的相吻合。The ducted body plays an important role in increasing the ducted aircraft lift. When the isolate rotor and coaxial rotors rotate at high speed, suction flow and low-pressure areas are formed near ducted lips and additional lift is produced by the ducted body. Based on the finite volume method, the influence of the ducted lip on their isolate rotor and coaxial rotors were researched. The analytical results show that the ducted lip has great influence on isolated rotor and coaxial rotors, and the rotor lift increases generally with increasing the radius of ducted lip. The distribution of coaxial rotor lift is changed with different radius of the ducted lip, the up rotor lift becomes bigger and bigger and the down rotor lift smaller and smaller gradually. When the radius of the ducted lip tends to the infinite, the numerical simulation shows that the distribution of the ducted coaxial rotor will gradually tend to that of the coaxial rotor.

关 键 词：涵道唇口 唇口半径 共轴双旋翼 数值模拟 拉力分配 

分 类 号：V211.45[航空宇航科学与技术—航空宇航推进理论与工程]