雷诺数对涡桨飞机增升装置气动特性影响的计算研究

雷诺数是表征流体粘性对流动影响的相似参数,对飞机部件的气动性能具有重要的影响.利用商业软件CFX对某民用涡桨飞机增升装置构型进行变雷诺数计算研究,详细分析雷诺数对升力系数、失速特性以及附面层速度特性的影响.结果表明:雷诺数对最大升力系数和失速迎角都有显著的影响;不同雷诺数下机翼分离形态变化显著,大雷诺数下机翼分离区域较小;不同雷诺数下机翼附面层状态不一致,雷诺数增大使得附面层速度型更饱满,机翼的抗分离能力增强.

Numerical investigation of Reynolds number effects on the aerodynamics characteristics of the high lift system for a turboprop aircraftXu Ruifei, Qian Ruizhan, Lei Wutao

Reynolds number is one of the most useful similarity parameters in fluid dynamics which denotes the effect of the viscosity on the fluid flow, it has the important effect on the aerodynamic characteristic of the aircraft. The variable Reynolds number research of the high lift for one of the civil turboprop aircraft is completed by the commercial software CFX in this paper. The effect of Reynolds number on the lift coefficient, pressure distribution, stall characteristic, and the velocity characteristic of the boundary layer are also carefully analyzed. The research indicates that the Reynolds number has the notable effect on the maximum lift coefficient and the stall angle; the state of separation on the wing change obviously under the different Reynolds number, the area of separation become smaller when the Reynolds number increases; the state of the boundary layer is different under the different Reynolds number, when the Reynolds number increases, the velocity profile is fuller, the trend of separation is limited.