What is the campaign coefficient?

In the area of ​​fluid and aerodynamics, the coefficient of campaign on a numerical figure that represents the resistance of the object - or pulling - when moving against the liquid medium, which is most often water or air. It can also take into account the surface area on which an object such as cement, grass or water is located. The term is most often used in the production of machines such as cars, aircraft and boats. In this “FD” formula, it refers to the towing force of the object or the energy that moves against the direction of the object. "P" is the mass density of the media, while "V" refers to the speed or speed of the object. "A", on the other hand, concerns the reference area of ​​the building. This principle may be clearer when the formula is reversed: FD = (PV2 CDA/2) and. This also means that the campaign coefficient may mainly differ in the way the air water passes through the object. The speed can turn with the shape of the object.

The general rule is that the wider the area that the liquid medium has to go through, the higher the campaign coefficient. With a square and cone, the wide area of ​​the square allows more air to push against it, unlike the cone, where the air can quickly rush from the pointed shape. In this way, a square -shaped object is experiencing more campaign and tends to travel more slowly compared to a conical object.

This principle is often used in designing cars, especially for sports cars that rely strongly on speed. It can be observed that the competitors are less and have a smooth, tilted front. This is to let the air pass through the car without any obstacles, creating a lower resistance coefficient, greater speed and more efficient fuel use. Sports cars also tend to sit on the ground compared to normal cars, so that the air that comes between tires and earth will be reduced. In this way, the car has a better grip of the ground and can drive faster.