Downwash - Wikipedia
网页In aeronautics, downwash is the change in direction of air deflected by the aerodynamic action of an airfoil, wing, or helicopter rotor blade in motion, as part of the process of producing lift. [1] In helicopter aerodynamics discussions, it …
Downwash Effects on Lift | Glenn Research Center | NASA
网页2024年7月15日 · There are many factors which influence the amount of aerodynamic lift which a body generates. Lift depends on the shape, size, inclination, and flow conditions of the air passing the object. For a three dimensional wing, there is an additional effect on lift, called downwash, which will be discussed on this page.
Induced Drag: How It Works - Boldmethod
网页2023年9月14日 · The airflow deflects downward, which is called downwash. Downwash changes the relative wind downward, which is an important point, because lift is always perpendicular to the relative wind. As downwash increases, the lift vector tilts backward, creating induced drag (see diagram below).
| How Things Fly - Smithsonian Institution
网页2013年10月2日 · Downwash is the air that is deflected by flowing around an airfoil. This airfoil can be the wing of a plane, the rotor of a helicoptor or a propeller on a plane.
下洗速度？ - 知乎
网页下洗本来的定义就是经过翼面后气流速度的向下分量，也就是你的问题本身就是答案，定义如此。. 至于为啥叫下洗，是因为英语叫downwash。. 同样的，直升机旋翼把空气往下推，也被称为下洗。. 为啥机翼后缘的下洗速度最大，是因为机翼下缘压力高上缘压力低 ...
下洗气流 - 百度百科
网页下洗气流，又称 旋翼 下洗流，是指直升机处于悬停状态时，旋翼转动使气流从旋翼上面流到旋翼下面而产生诱导速度，诱导速度和叶素圆周运动速度的合速度形成叶素真速使空气就向着拉力相反的方向流动。. 这种条件下，旋翼上表面压强小，下表面压强大，在 ...
Downwash - Vocab, Definition, and Must Know Facts - Fiveable
网页Downwash is the downward deflection of airflow caused by the lift generated by an airfoil, such as a wing. This phenomenon occurs when airfoil generates lift, resulting in high-pressure air below the wing being displaced downward and …
Downwash Behind an Airfoil - HyperPhysics
网页Part of the modeling of lift force involves attachment of the boundary layer of air on the top of the wing with a resulting downwash of air behind the wing. If the wing gives the air a downward force, then by Newton's third law, the wing experiences a …
| How Things Fly - Smithsonian Institution
网页2017年4月24日 · Downwash is the air that is deflected by flowing over an airfoil, whether from a plane's wing or a helicopter blade. One way to reduce drag is to change the wing tip by adding a winglet, reducing wing tip vortices. In a helicopter, flying closer to the ground and decreasing the angle of attack of the rotor airfoils reduces downwash. Posted on ...
下洗 - 百度百科
网页下洗是航空术语，指机翼产生升力时引发流经机翼的气流向下运动，这个向下的速度分量称为下洗，通常用w表示。.
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