downwash


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downwash

[′dau̇n‚wäsh]
(fluid mechanics)
The downward deflection of air, relative to the direction of motion of an airfoil.

downwash

downwash
downwashclick for a larger image
downwash
downwash
i. Fluid flow moving at a deflected angle after deflection by helicopter rotors and measured parallel to the disc.
ii. Fluid flow deflected at an angle more perpendicular to the motion of the airfoil, measured in the plane parallel to the plane of symmetry close behind the trailing edge.
iii. Air that has passed around the main wing or rotor and now strikes the tailplane at an angle different from the direction of flight.
iv. Air that has been accelerated downward by the action of the rotors of a helicopter.
References in periodicals archive ?
In this previous study, effects of circulation, thickness, and compressibility were retained, while the effects of shed vorticity and downwash were not modeled.
Figure 17 indicates that there is minimal downwash, with the bottom vortex spanning across the whole height of the base.
AIM 7-3-7, "WakeTurbulence," lays down some good words of warning: "In a slow hover taxi or stationary hover near the surface, helicopter main rotor(s) generate downwash producing high velocity outwash vortices to a distance approximately three times the diameter of the rotor .
Dominator Platinum memory kits have a striking industrial design for good looks, patented DHX technology for cooler operation, user-swappable colored "light pipes" for customizable downwash lighting, and Corsair Link compatibility for real-time temperature monitoring.
You start hovering over him, and he's being toasted in 600 degree [Fahrenheit] downwash.
By observation of a downwash velocity field in the presence of holes, the authors attributed the reduction in flow loss to the spiral flow with less vortex strength.
Her CHU was located adjacent to a MEDEVAC helicopter landing zone where rotor downwash may have aerosolized soil particles that led to infection, although no other case reports were identified in her area of operations.
However, the Convertiplane was (optimistically) supposed to retain the low disc loading of a helicopter, in order to produce at the hover the moderate downwash desirable for rescue operations.
THE dust raised by rotor downwash in remote corners of the country has returned as political bigwigs hit the campaign trail for the biggest ever electoral battle, even as they shell out much more this time for reaching out to maximum number of voters in the shortest possible time.
This disconnect helps the follower dodge the substantial downwash of air directly to the rear of a flying bird, Portugal and his colleagues report in the Jan.
There was also an incident in November 2011 where the Air Ambulance hospitalised a bystander when it blew wooden pallets into their legs with its downwash.
The hook-up men--one maintainer determinedly gripping a 12-foot pendant while the other supported him--braced at the decks center for the incoming downwash.