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13-08-2017, 10:18 AM

ppt aerodynamics in cars full report

jaseela123d · 16-08-2017, 02:43 PM

Automobile aerodynamics is the study of the aerodynamics of road vehicles. Its main objectives are to reduce drag and wind noise, minimize noise emission and avoid unwanted lifting forces and other causes of aerodynamic instability at high speeds. Air is also considered a fluid in this case. For some classes of racing vehicles, it may also be important to produce aerodynamic force to improve traction and, therefore, cornering capabilities.

The drag force of the aerodynamic drag increases significantly with the speed of the vehicle. As early as the 1920s engineers began to consider the shape of the automobile in reducing downforce at higher speeds. In the 1950s, German and British automotive engineers systematically analyzed the effects of car trawling for higher performance vehicles. In the late 1960s, scientists also realized the significant increase in sound levels emitted by high-speed automobiles. These effects were understood to increase the intensity of sound levels for land uses adjacent to a non-linear rate. Soon highway engineers began designing roads to consider the effects of the drag speed produced sound levels, and car manufacturers considered the same factors in the design of the vehicle.

An aerodynamic automobile will integrate the arcs and wheel lights into overall shape to reduce drag. It will be rationalized; For example, it has no sharp edges that cross the wind current on the windshield and will contain a kind of tail called fastback or Kammback or liftback. Keep in mind that the Aptera 2e, the Loremo, and the Volkswagen 1 liter car try to reduce the area of your back. It will have a flat and smooth floor to withstand the Venturi effect and produce desirable downward aerodynamic forces. The air entering the engine bay, is used for cooling, combustion, and for passengers, then reaccelerated by a nozzle and then ejected under the floor. For middle and rear engines, air is decelerated and pressurized in a diffuser, it loses some pressure as it passes through the engine compartment and fills the slipstream. These cars need a seal between the low pressure region around the wheels and the high pressure around the gearbox. All have an enclosed floor of the engine bay. The suspension is rationalised (Aptera) or retracted. Door handles, antenna, and roof rails may have an aerodynamic shape. The side mirror can only have a round face like a nose. The airflow through the bays of the wheels is said to increase resistance (German source) although race cars need it for cooling the brakes and many cars emit air from the radiator in the wheel bay.

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