论文部分内容阅读
螺旋桨滑流对飞机的升力系数、阻力系数、俯仰力矩系数有着非常重要的影响,该文通过风洞实验方法,探索螺旋桨滑流对飞机气动特性影响的规律。与目前国内常用的全机带动力实验不同,该文结合西北工业大学NF-3低速风洞的翼尖支撑测量系统和螺旋桨及短舱独立支撑机构开展研究,研究了桨叶角、前进比和拉力系数对螺旋桨滑流效果的影响。研究表明:螺旋桨滑流效果主要取决于其拉力系数,飞机升力系数随螺旋桨拉力系数的增大而增大,阻力系数和俯仰力矩系数随螺旋桨拉力系数的增大而减小。
The propeller slipstream has a very important influence on the lift coefficient, drag coefficient and pitch moment coefficient of the aircraft. Through the wind tunnel experiment, this paper explores the influence of the propeller slipstream on the aerodynamic characteristics of the aircraft. Different from the commonly used full-machine dynamic test in China, this paper combines the wing tip support measurement system of propeller and nacelle independent support mechanism of NF-3 wind tunnel at Northwestern Polytechnical University, and studies the influence of blade angle, forward ratio and Effect of Rally Coefficient on Propeller Slip Effect. The results show that the effect of propeller slip depends on the pull coefficient, the lift coefficient increases with the increase of the propeller pull coefficient, and the drag coefficient and pitch torque coefficient decrease with the increase of the propeller pull coefficient.