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

Monday, July 11th, 2016 - autos

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

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


manufacturers are moving away via the wind tunnel test in addition to choose to use virtualization technologies instead in their quest to reduce the aerodynamics.

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

virtualization technologies are not only faster in addition to less expensive than the use of the wind tunnel although also yield better results.


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

The ultimate goal of which industry to cut building physical versions altogether in addition to go directly via the virtual modeling inside a computer for, the final material production car.

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

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

Examples of air curtains in addition to shutters to open dragcreating active cooling vents only when necessary, aerobic signs to reduce noise in addition to drag in addition to lift the limit personal smoothly. The battle currently will 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) in addition to was able to produce smaller amounts of Volkswagen XL1 (Cd = 0.189) to achieve which

reducing drag: the early years

efficient aerodynamics will be a key factor inside design of cars in addition to the impact on the economy in fuel consumption in addition to emissions, in addition to range.

because aerodynamics will be a powerful force 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 via the start which air passes through a severe form separates inside rear, causing the pressure drop in addition to literally absorb the vehicle to the rear

lengthening in addition to simplifying reduces which purpose; an early example of which will be the 1934 Chrysler Airflow. although a huge teardrop shapes are impractical in parking lots, in addition to in 1936, Wunibald cam tail cam invented by snipping off the end of the tear.

The “cam” effect which was created to prevent the air via the season, in addition to the reduction of drag. They carry these two features until modern hatchback, in addition to 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, in addition to leading drag coefficient of 0.30 in addition to, today, slippery aerodynamics are top of the agenda for all manufacturers.

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