 Bicambered™ airfoils improve airflow by
using the back half of the airfoil more effectively
than do traditional airfoils. Whether you think of
it as connecting two smaller airfoils together, or
providing a second favorable pressure gradient to
improve flow on the back half of the airfoil, the
benefits are clearly, more attached flow, a stabilized
boundary layer, significant reduction of upper surface
pressure and increased lower surface pressure. Greater
pressure difference produces more lift; less turbulence
yields less drag and less noise.
Noise produced by airfoils is caused by turbulent
flow that separates somewhere along the upper surface
of the airfoil. In extreme cases, this separation
creates swirling eddy currents that can move much
faster locally than the airfoil itself is traveling.
When these flows reach critical speed, (mach 1, the
speed of sound), they can produce loud cracking sounds
like the crack of a whip, or bark of a propeller,
or the pocketta-pocketta sound of a helicopter. Below
mach 1 they make lesser noises; humming, swooshing,
whistling, etc. fans can be annoyingly noisy. By
reattaching flow at the back of the airfoil and providing
a much shorter down slope for separation to develop,
Bicambered™ airfoils can reduce decibel levels
and sound carrying ability substantially.
Contact us today and
let us show you how our patented technology can be
implemented into the design of your next product.
Give us a call at 1-800-776-7357 or
complete our Contact
Form for more information. |
