Henri COANDA
Coanda
Effect --- US Patents
Henri Coanda
US Patent # 2,052,869
Device for Deflecting a Stream of Elastic Fluid Projected into an Elastic Fluid
Henri Coanda
Sept. 1, 1936
It is an observed fact that when a stream or sheet of fluid issues through a suitable orifice, into another fluid, it will carry along with it a portion of the surrounding fluid, if its velocity is sufficient. In particular, if a sheet of gas at high velocity issues into an atmosphere of another gas of any kind, this will produce, at the point of discharge of the said sheet of gas, a suction effect, thus drawing forward the adjacent gas.
If, at the outlet of the fluid stream or sheet, there is set up an unbalancing effect on the flow of the surrounding fluid induced by said stream, the latter will move towards the side on which the flow of the surrounding fluid has been made more difficult.
It is thus evident that it will be possible, by a suitable checking of the surrounding fluid in one side of the orifice from which the fluid stream or sheet is discharged at high velocity, to act indirectly upon the direction of the issuing stream or sheet. In consequence, by the successive checking of the several layers of the fluid sheets on the proper side, if it is considered that the latter may be theoretically divided into layers to facilitate the demonstration, they may be made to follow any desired path.
Such is the object attained by the present invention, whose essential characteristic consists in the production of a determined unbalancing effect in the flow of the surrounding fluid induced by a sheet or stream of fluid which is discharged thereinto at high velocity.
For this purpose, the discharge orifices for the fluid each include, on the side toward which said sheet or stream is to be deflected, guiding means, for instance a flap which is suitably inclined according to the rate of flow and the velocity of the fluid, and said flap may be more or less extended and may be more or less inclined, according to the path which said stream is to be made to follow. On the other hand, by a proper knowledge of the physical constants of the surrounding fluid and of the fluid discharged into the same, it is possible to determine the optimum curve to be given to the means for guiding the stream, according to its rate of flow and velocity.
The invention further relates to the application of the said process for the deflection of fluid streams which penetrate with a high velocity into another fluid. In particular, it relates to its application to the change of direction of the direct reactions due to the abrupt discharges of one fluid into another, which reactions are even greatly increases by the fact that on the side which is not checked, the effect of suction is very greatly increased.
The accompanying diagrammatic drawing shows the direction of the streams of fluid which are discharged at high speed into another fluid through a nozzle, in the case of an equilibrium or lack of equilibrium of the facilities of withdrawal of the surrounding fluid at the sides of the stream.
Figure 1 shows the free discharge of a fluid stream 1, issuing from a nozzle, for instance, whose cross section has the form of a slot 2, also showing the induced flow of the surrounding fluid according to the arrows 3.
Figure 3 shows the checking of the surrounding fluid on one side of the stream by means of a flap 4 which prevents the flow of the surrounding air from space 5, and also the deflection, according to the arrows 3,of the issuing stream discharged from said nozzle.
Figure 3 represents the flap 4 which is extended according to a given outline, thus producing a strong suction, at 6, of a stream which is entirely turned about, according to the arrows 7. This will eliminate the impact upon the surrounding fluid, which occurs in front of a sheet of fluid discharged at high velocity into another fluid.
I claim: [ Claims not included here]
USP # 2,108,652 ~ Propelling Device
USP # 2,131,472 ~ Motor
USP # 2,770,501 ~ Means for the Atomization of Liquids
(Does not use the Coanda Effect)
USP # 2,939,654 ~ Device for Simultaneous Control of Lifting & Directional Elements
USP # 2,988,139 ~ Spraying Device
(Does not use the Coanda Effect)
Some Coanda Effect US Patents
USP
# 4,069,977 ~ # 4,078,498 ~ #
4,146,197 ~ # 4,266,142 ~# 4,261,516 ~ # 4,341,643 ~ #
4,348,168 ~ # 4,392,621 ~
#
4,405,296 ~ # 5,732,478 ~ # 5,749,161 ~ # 5,884,360
USP # 4,446,695 ~ Aircraft Propulsion Assembly
USP# 4,464,110 ~ Flare Using a Coanda Directing Surface
USP # 4,478,378 ~ Aircraft with Jet Propulsion
USP # 4,537,371 ~ Lawhorn, W.: Coanda Effect Bullet
USP # 4,579,300: Carr, Robert: Internal Wing Aircraft
(*** Outstanding)
USP # 4,442,986 ~ Leading Edge Augmentor...
USP # 5,067,509~ Gas Jet Actuator Using Coanda Effect
USP # 5,085,039 ~ Coanda Phenomena Combustor
USP # 5,097,660 ~ Coanda Effect Turbine Nozzle Vane Cooling
USP# 5,293,946 ~ Divergent Fluid Nozzle for Drilling Tool
USP # 5,545,063 ~ Chambered Anti-Coanda Jet Marine Propulsion Device...
USP # 5,601,047 ~ Dual-Cavitating Hydrofoil Structures
USP # 5,658,141 ~ Device for Spreading A Flame by the Coanda Effect
USP # 5,974,802 ~ Exhaust Gas Recirculation System...
USP # 6,000,635 ~ Exhaust Nozzle for a Turbojet Engine
USP # 6,039,269 ~ Coanda Effect Nozzle
USP # 6,234,169 ~ Inhaler
USP # 6,240,911 ~ Air Amplifier
Google.com Search Results for "Coanda Effect" (First 6 pages only) ~ Jef Raskin's Coanda Effect: Understanding Why Wings Work Site Directory, MODEL AIRPLANES,
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www.aardvark.co.nz/pjet/coanda.shtml - 11k - Jun 29, 2003CoandaEffect -- from Eric Weisstein's World of Physics
... Alphabetical Index. About this site. Experimental Physics >, Effects v. Fluid
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web.bham.ac.uk/M.L.Wyszynski/ currentprojects/coanda.html - 2kThe Coanda Flying Saucer, "The Repulsin" type A
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[ More results from jnaudin.free.fr ]CoandaEffect - Wikipedia
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flat-plate deflection surface. Von Glahn, Uwe H NACA TN-4272 June 1958 ...
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www.mycomj.co.jp/eindex/jack/jack2.htm - 4kThe CoandaEffect
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device recently and hope you find it interesting also. ... The Coanda Effect. ...
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www.haug-static.com/Haug_Air_Knife.htm - 19kCoandaEffect - Eduseek
Home, Subjects, Help, Age Groups. Subjects > Science > Science - 16+ > Physics
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The Coanda Effect. Sound complicated? ... In this experiment we demonstrate the second
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... But the most known, studied, and applied discovery of Henri Coanda is
the 'Coanda Effect'. Henri stated that the first time he realized ...
Description: Henri Marie Coanda was the second son of Constantin M. Coanda who had five sons and two daughters....
www.allstar.fiu.edu/aero/coanda.htm - 17k - Jun 29, 2003 - CachedHenri Coanda... The most known, studied, and applied discovery of Henri Coanda is the
"Coanda Effect". Coanda realized for the first time what would ...
www.deltawing.go.ro/history/coanda.htm - 13k[PDF]Laboratory Testing and Numerical Modeling of Coanda-Effect ...
File Format: PDF/Adobe Acrobat - View as HTML
... This attachment of the flow to the top surface of each wire is an example of the
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www.usbr.gov/pmts/hydraulics_lab/ twahl/coanda/coanda2000.pdf[PDF]HYDRAULIC PERFORMANCE OF COANDA-EFFECT SCREENS
File Format: PDF/Adobe Acrobat - View as HTML
... Keywords: fish screens; debris screens; wedge-wire screens; spatially-varied flow;
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www.usbr.gov/pmts/hydraulics_lab/ twahl/coanda/coandajournal.pdf[DOC]Article pour Florence
File Format: Microsoft Word 97 - View as HTML
... channel. Physically this phenomenon is related with the Coanda effect
(the tendency for a flow to follow the wall of a channel). This ...
www.icp.inpg.fr/~cvilain/article_MAVEBA_1999.docFigure 2 - Coanda Effect
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coanda-effect. coanda-effect Looking for something like "coanda-effect"?
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www.aa.washington.edu/faculty/eberhardt/lift.htm - 42kEureka - new ideas in technology
... helicopters. The CoandaEffect is named after Henry Coanda, a young Romanian
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www.eureka.findlay.co.uk/archive_features/ Arch_Fluid_power/coanda/coanda.htm - 12kPaper Airfoil Aerodynamics
... This effect is known as the Coanda effect. Figure 4.2 and 4.3 show this
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members.fortunecity.com/chadms/aero4.htm - 25k[PPT]Effects of an induced asymmetry on the flow through the glottis ...
File Format: Microsoft Powerpoint 97 - View as HTML
... 10. Coanda effect (1). Definition: Tendency for a flow to follow the wall of a
diverging channel. ... 11. Coandaeffect (2). Requires a finite time to appear. Re. ...
www.icp.inpg.fr/~cvilain/presentation_florence.pptHenri Coanda was one of the pioneers of the Romanian aviation
... The most known, studied, and applied discovery is the "Coanda Effect". Made
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romania-on-line.net/halloffame/CoandaHenri.htm - 29kResearch in the ENERGY GROUP
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www.rdg.ac.uk/energy/book/msc99.html - 16kThe PHOENICS Journal - vol 9, issue 2
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www.simuserve.com/cfd-shop/vol9-2.htm - 14kThe PHOENICS Journal - vol 6, issue 4
... Abstract. Prediction of Coanda Effect Flow Fields M. Kopmels and AG Smith
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www.simuserve.com/cfd-shop/vol6-4.htm - 13kAmerican Antigravity - Vortex Thruster Aircraft Technology
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www.americanantigravity.com/vortexthruster.html - 48k[PDF]Microsoft PowerPoint - Lecture09.ppt
File Format: PDF/Adobe Acrobat - View as HTML
... Page 24. 24 47 Microfluidic devices CoandaEffect 48 Microfluidic devices
Coanda effect steering Page 25. 25 49 Microfluidic devices ...
mems1.inrf.uci.edu/ece119/lectures/lecture09.pdfNewsletter
*, Ping-Pong Ball Floating in the Air Quantitative Measurement of Coanda Effect
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... The Coanda effect. ... Amazed by what was going on -- which is now known as the Coanda
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www.sjc.ox.ac.uk/scr/sobey/bce.html - 3kAeronautics
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mainland.cctt.org/istf2003/flight.asp - 15kEncyclopedia of free energy free energy articles,documents ect
... Pages 1--15 from Radiant Energy Research Manual 2.0.1. The "Coanda Effect" A
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www.geocities.com/ResearchTriangle/ Lab/1135/newstuff.html - 12kHow Airplanes Fly
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www.tli.unt.edu/library/planesfly/resource.html - 22k[PDF]3096 UK Infant flow Brochure AW
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... invasive method of respiratory support, working in harmony with the infant's own
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www.eme-med.co.uk/products/product-29-45420.pdfTesla Turbine Myths
... Seeing the squabble over friction or adhesion when explaining the Tesla turbine,
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my.execpc.com/~teba/debunk/lancaster - 11kRunRyder - another NOTAR fuse on the way
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runryder.com/helicopter/t19898p2/ - 21kThe Schauberger Flying Saucer "The Repulsin"
The Coanda Effect. The Coanda Effect has been discoveredin1930 by the
Romanian aerodynamicist Henri-Marie Coanda(1885-1972). He has ...
members.tripod.com/~geoffegel/coanda.htm - 6k[PDF]Microsoft PowerPoint - 03_Physics_03
File Format: PDF/Adobe Acrobat
... Fluid Dynamics 3.3.3. CoandaEffect h Deflection of jets at curved surfaces Discovered
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www.myfluidix.com/Materials/PDF/03_Physics_03.pdfWind mill based on Viktor Schaubergers vortex technique
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The Coanda effect is basically the same thing that happens ...
home.swipnet.se/~w-58759/windmill/windmill.html - 6k
Scientific American (1980s)
Figures excerpted from:"Applications of the Coanda Effect" by
Imants Rebs
