What principle does the current airplane fly on

The balance of force is more appropriate to explain, the historical balance of the aircraft acting on the aircraft when it moves at a uniform speed in the air: the forward and backward resistance of the aircraft engine is equal, the downward gravity of the aircraft and the upward thrust of the aircraft are equal, and there is a force decomposition when the upward drag and backward resistance are decomposed, that is, the thrust of the wing of the " type is affected by the air to the backward and upward thrust, and the take-off and landing, acceleration and deceleration of the aircraft are achieved by changing the angle of the wing and adjusting the speed of the engine.

To put it bluntly, it is all due to the fact that the air pressure under the wing is greater than the air pressure above, and it is pressed by the air.

Airplanes are able to fly into the sky, mainly by the power generated by the engines and through the wings.

The resulting lift force. Take a look at the wing, its front end is semicircular, gradually thinning back and pointed, the surface of the wing is smooth and raised, when the air flows above and below the wing, different flow rates are produced up and down the wing, the air flow speed above is fast, the pressure generated is small, the air flow speed below is slow, the pressure generated is large, therefore, the aircraft has an upward lift, and the greater the thrust of the aircraft, the faster the speed, the greater the upward lift obtained. The take-off and landing of the aircraft are carried out under the headwind, in the case of wind and no wind, the distance of the glide is not the same, the distance of the take-off and glide is shorter when the headwind is upwind, on the contrary, when there is no wind and downwind, the take-off and running distance will increase, in short, the higher and faster the plane flies, the greater the power required, and the more fuel is consumed.

Airplanes fly into the sky on the principle of aerodynamics. Most of the lift of the aircraft is generated by the wing, and the air flows to the leading edge of the wing, which is divided into two streams, upper and lower, which flow along the upper and lower surfaces of the wing respectively, and thus form a pressure difference, and the sum of the pressure difference perpendicular to the direction of the relative air flow is the lift of the wing.

The airplane relies on the wings to generate lift, so that the aircraft leaves the land and rises into the air, and after the aircraft lifts off, it relies on the aircraft engine.

The ejected air currents prompt the aircraft to fly through the air.

nbsp;An airplane is a type that is capable of flying in the skyTransportationI believe everyone knows, but why does the plane fly and not fall? What kind of power does it take to fly? Let's find out.

Details:

Air is not invisible, you can think of it as a stealth inflatable cushion, if you hit it lightly, you won't feel anything, but if you accelerate and run into it, it will be bounced back by the gas in the pad, this is the force that air produces on people.

Air energy. The forces provided should be viewed from a spatial point of view, including vertical lift, downforce, horizontal drag, and pull. If the plane wants to fly upward, the lift force must be greater than the downward force, so the wing has a certain elevation angle.

When the air passes, a small part of the air goes up, most of the air goes down, the air above is less, the flow rate is faster, and the air below is more, and the flow rate is slow like a traffic jam;

And in aerodynamics.

In the place where the flow rate is fast, the pressure is small, so the downward pressure above the wing is less than the lift under the wing, and the lift pushes up, and the aircraft will naturally fly, the range hood.

That's the same thing. With one more assist, the faster the aircraft, the greater the lift, and the higher the aircraft will fly.

Everyone knows that the streamlined design of the nose reduces the oncoming air resistance.

The tail has three parts, which are divided into vertical upward directional wings and left-right symmetrical lifting wings. Bottom line, none of them are fixed! There are steerable rudders on the tail fin, and when the aircraft is about to turn, the steering rudder has its own function to change the air force.

Frontal view of the aircraft, if the aircraft is going to turn left, the left elevator should be turned down, and the right elevator should be up, and the fuselage will tilt to the left. The rudder is to the right, the pressure on the right is less than on the left, the tail is pushed to the right, and the nose of the plane naturally turns to the left.

The same application is also when the plane lands, there will be a baffle above the wings to rise, many people think that the plane is broken, but they don't know that it is to reduce the upward flow of air and improve the lift so that the plane will not hit the ground hard, and there is also a part of the forward deceleration function.

The shape of the wing of the aircraft can make the flow velocity under the wing lower than the flow rate above, resulting in the pressure difference between the upper and lower wings, that is, the pressure below is stronger than the pressure above, so there is a lift, and this pressure difference is related to the forward speed of the aircraft.

The ascent of the aircraft is based on Bernoulli's principle, that is, the greater the flow velocity of the fluid, the smaller the pure strength of the press; The smaller the flow velocity, the greater the pressure.

The greater the speed at which the aircraft travels, the greater the pressure difference, i.e., the lift. Therefore, the plane must take off at a high speed so that the plane can take to the sky. When the plane needs to descend, as long as it reduces the speed of its forward, its lift will naturally become smaller, less than the weight of the aircraft, and it will descend and land.

Fixed-wing aircraft refers to an aircraft with wings, one or more engines, propelled by its own power, and capable of being denser than air in space or the atmosphere. If the density of the aircraft is less than air, then it is a balloon or an airship. If there is no power unit and can only glide in the air, it is called a glider.

If the wing of the aircraft is not fixed, it is a rotorcraft that generates lift by wing rotation.

Principle of Flight: In a real wing that generates lift, the airflow always meets at the trailing edge, otherwise a point with an infinite velocity would be created at the trailing edge of the wing. This condition is known as the Kuta condition, and only when this condition is met can the wing generate lift.

In an ideal gas or at the beginning of the wing's movement, this condition is not satisfied, and a viscous boundary layer is not formed.

Usually the airfoil (wing cross-section) is longer than the lower distance, at the beginning of the absence of circulation, the upper and lower surface airflow velocity is the same, resulting in the lower airflow to the trailing edge when the upper airflow has not reached the trailing edge, the rear station is located at a point above the airfoil, the lower airflow must bypass the sharp trailing edge and meet the upper airflow. Due to the viscosity of the fluid (i.e., the Conda effect), a low-pressure vortex is formed as the lower airflow wraps around the trailing edge, resulting in a large backpressure gradient at the trailing edge. Immediately, this vortex will be washed away by the incoming current, and this vortex is called the starting vortex.

According to Heimholtz's law of conservation of vortices, for an ideal incompressible fluid, there will also be an eddy around the airfoil in the opposite direction to the strength of the starting vortex under the action of force, which is called circulation, or circumferential circumference.

The circulation flows from the leading edge of the upper surface of the airfoil to the leading edge of the lower surface, so the addition of the circulation and incoming flow causes the rear station to eventually move back to the trailing edge of the wing, thus satisfying the Kuta condition. The amount of air around the wing caused by satisfying the Kuta condition causes the air flow on the upper surface of the wing to accelerate backwards, and the pressure difference can be deduced from Bernoulli's theorem and the lift force can be calculated, and the final lift generated by this ring can also be calculated by the Kuta-Zhukovsky equation: l (lift) = v (gas density, flow velocity, ring value) This equation can also calculate the aerodynamic force of the Magnus effect.

According to Bernoulli's theorem – "The faster the velocity of a fluid, the smaller its static pressure (static pressure is the pressure generated by the fluid as it flows perpendicular to the direction of fluid motion). "Therefore, the pressure exerted by the air on the upper surface of the wing, f1 is less than that of the lower surface, and the resultant force must go upward, which creates lift. The principle of lift is that the presence of the ring around the wing (attachment vortex) causes different flow velocities and different pressures on the upper and lower surfaces of the wings.