Aerodynamics: why virtual testing is usually better than a wind tunnel

Monday, July 11th, 2016 - autos

Source : Aerodynamics: why virtual testing is usually better than a wind tunnel

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


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

by switching to computer simulations, engineers designed the aerodynamics from the vehicle type without even build one.

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


one, EXA, along with also produces a set of programs called Powerflow of which has at of which point been adopted by several leading automakers, including Tesla , Jaguar Land Rover , BMW , Ford along with also Volkswagen . The use of the package on most cars produce aerodynamic Jaguar yet, XE along with also 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 also EXA. CEO of Tesla’s Elon Musk has developed a drag-along with also-drop target coefficient through 0.21 to Form 3, due next year. of which weakens competitors such as the Mercedes-Benz C-Class (0.24), BMW 3 series (0.27) along with also XE (0.26).

The ultimate goal of of which industry to cut building physical products altogether along with also go directly through the virtual modeling inside a computer for, the final material production car.

One of the main advantages is usually of 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 of which technology gives a more accurate analysis of performance in real-world conditions, along with also provides feedback to the implementation on how to improve the design, something of which is usually 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 also the method of wind tunnel is usually equivalent to the difference of 5% in fuel consumption.

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

Examples of air curtains along with also shutters to open dragcreating active cooling vents only when necessary, aerobic signs to reduce noise along with also drag along with also lift the limit personal smoothly. The battle at of which point is usually 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 also was able to produce tiny amounts of Volkswagen XL1 (Cd = 0.189) to achieve of which

reducing drag: the early years

efficient aerodynamics is usually a key factor from the design of cars along with also the impact on the economy in fuel consumption along with also emissions, along with also range.

because aerodynamics is usually a powerful force of 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 through the start of which air passes through a severe form separates from the rear, causing the pressure drop along with also literally absorb the vehicle to the rear

lengthening along with also simplifying reduces of which purpose; an early example of of which is usually the 1934 Chrysler Airflow. nevertheless a huge teardrop shapes are impractical in parking lots, along with also in 1936, Wunibald cam tail cam invented by snipping off the end of the tear.

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

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

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