Aerodynamics: why virtual testing can be better than a wind tunnel

Monday, July 11th, 2016 - autos

Source : Aerodynamics: why virtual testing can be better than a wind tunnel

Virtual aero testing Jaguar F- Pace can be the latest design to give up their wind tunnels in favor of computer simulations to reduce the pull; the item provides money


manufacturers are moving away coming from the wind tunnel test along with choose to use virtualization technologies instead in their quest to reduce the aerodynamics.

by switching to computer simulations, engineers designed the aerodynamics inside car design without even build one.

virtualization technologies are not only faster along with less expensive than the use of the wind tunnel however also yield better results.


one, EXA, along with produces a set of programs called Powerflow in which has at This kind of point been adopted by several leading automakers, including Tesla , Jaguar Land Rover , BMW , Ford along with Volkswagen . The use of the package on most cars produce aerodynamic Jaguar yet, XE along with XF , as well as F- Pace .

was the first Jaguar XE who quite like the dynamics in a virtual environment air, a feat in 1200 involving computer simulation.

Tesla also use the software along with EXA. CEO of Tesla’s Elon Musk has developed a drag-along with-drop target coefficient coming from 0.21 to Form 3, due next year. This kind of weakens competitors such as the Mercedes-Benz C-Class (0.24), BMW 3 series (0.27) along with XE (0.26).

The ultimate goal of This kind of industry to cut building physical types altogether along with go directly coming from the virtual modeling inside a computer for, the final material production car.

One of the main advantages can be in which the program can be highlighted on the spot where aerobic shortages are in design, while the poor results of wind tunnel can be left engineers scratching their heads with respect to the exact cause


EXA spokesman said: “the use of This kind of technology gives a more accurate analysis of performance in real-world conditions, along with provides feedback to the implementation on how to improve the design, something in which can be not possible with conventional test methods.”

EXA simulation Powerflow claims are accurate to the equivalent of cadmium = 0.001. By way of comparison, the traditional wind tunnel tests get to within just Cd = 0.003.

until the difference between the virtual method along with the method of wind tunnel can be equivalent to the difference of 5% in fuel consumption.

EXA also says there could be between 10% wind tunnel teams along with the results of the test inside real world. Virtual environment in which allows manufacturers to develop dynamic elements aerobic advanced more quickly.

Examples of air curtains along with shutters to open dragcreating active cooling vents only when necessary, aerobic signs to reduce noise along with drag along with lift the limit personal smoothly. The battle at This kind of point can be to get less than the number of tantalizing cadmium = 0.2 for the production of major car.

So far, the concepts just like Mercedes concept IAA (Cd = 0.19) along with was able to produce modest amounts of Volkswagen XL1 (Cd = 0.189) to achieve This kind of

reducing drag: the early years

efficient aerodynamics can be a key factor inside design of cars along with the impact on the economy in fuel consumption along with emissions, along with range.

because aerodynamics can be a powerful force in which increases with the square of the speed, effectively doubling the speed, four times the clouds.

use ultra slippery shapes of cars can be traced back to the early 20th century. Designers realized coming from the start in which air passes through a severe form separates inside rear, causing the pressure drop along with literally absorb the vehicle to the rear

lengthening along with simplifying reduces This kind of purpose; an early example of This kind of can be the 1934 Chrysler Airflow. however a huge teardrop shapes are impractical in parking lots, along with in 1936, Wunibald cam tail cam invented by snipping off the end of the tear.

The “cam” effect in which was created to prevent the air coming from the season, along with the reduction of drag. They carry these two features until modern hatchback, along with can be seen inside effects of each of the Mercedes concept of IAA, Volkswagen XL1.

inside 1980s, boasted 100 Audi what was, for the production of cars, along with leading drag coefficient of 0.30 along with, today, slippery aerodynamics are top of the agenda for all manufacturers.

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