飞机升力的研究（精品）

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,the Study of Lift of the Aircraft,Firstly,let us watch a video in order to know what is the lift of the aircraft,the formula,expressed by,lift coefficient,Lift,Power angle,the airflow,express the,pressure component,r,the density of the fluid,is the same with,is the Mach number that express the,flow velocity of a point in the ratio of speed of the sound at the point,v,the relative velocity of the fluid,p,Resistance,the Friction,the formula,expressed by,drag coefficient,v,(including friction and pressure resistance),is the vertical projection area of the wing,p,is drag coefficient,pressure resistance,the formula expressed by pressure coefficient,the pressure coefficient for incompressible flow,the frontal area of the wing,the total,resistance,We can also,written in this form,At last,the total force is,Therefore,the plane can fly under the action of these four forces that is gravity,lift,resistance and thrust,An experiment,the formula,expressed by,lift coefficient,?,Thats all,thank you!,