108
P. Liu
reaching a new equilibrium state, the flow around the trailing edge
will return smoothly leaving the trailing edge. It is just that the direction of the vortex shedding is different between the accelerating airfoil
and the decelerating airfoil.
2.4 Low-Speed Flow Around Wing
The main components of the aircraft are the fuselage and wings (as shown
in Fig. 2.39). The wings of the aircraft are the aerodynamic components
that generate lift. In order to achieve a good aerodynamic effect, the wings
are generally made of three-dimensional thin slender warped body structure,
which is arranged on both sides of the fuselage (can be located on the upper,
lower, and middle of the fuselage). There are various shapes of wings. The
layout and shape of wings can be optimized according to different flight
speeds and missions (as shown in Figs. 2.40 and 2.41). The earliest shape
of the wing is a flat plate, such as the shape of a Chinese kite (with a hub
to spread the cloth). The lift–drag ratio of the flat plate wing is the smallest,
generally 2 to 3. Then there is the bend, which has a lift–drag ratio of 5.
Fig. 2.39 Flow around wing and airfoil (section)
P. Liu
reaching a new equilibrium state, the flow around the trailing edge
will return smoothly leaving the trailing edge. It is just that the direction of the vortex shedding is different between the accelerating airfoil
and the decelerating airfoil.
2.4 Low-Speed Flow Around Wing
The main components of the aircraft are the fuselage and wings (as shown
in Fig. 2.39). The wings of the aircraft are the aerodynamic components
that generate lift. In order to achieve a good aerodynamic effect, the wings
are generally made of three-dimensional thin slender warped body structure,
which is arranged on both sides of the fuselage (can be located on the upper,
lower, and middle of the fuselage). There are various shapes of wings. The
layout and shape of wings can be optimized according to different flight
speeds and missions (as shown in Figs. 2.40 and 2.41). The earliest shape
of the wing is a flat plate, such as the shape of a Chinese kite (with a hub
to spread the cloth). The lift–drag ratio of the flat plate wing is the smallest,
generally 2 to 3. Then there is the bend, which has a lift–drag ratio of 5.
Fig. 2.39 Flow around wing and airfoil (section)