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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 #2,157,281 ~ Propelling Device


USP #2,173,549 ~ Silencer for Engines


USP #2,173,550 ~ Exhaust of Gases from Engines


USP #2187342 ~ Exhaust of Gases from Engines


USP # 2,198,655 ~ Device for Facilitating the Discharge of a Gas Under Pressure


USP # 2,699,644 ~ Hydropropeller



USP # 2,770,501 ~ Means for the Atomization of Liquids


USP #2,796,147 ~ Cyclone Separator


USP #2,803,591 ~ Apparatus for Purification of Undrinkable Water
(Does not use the Coanda Effect)


USP #2,907,557 ~ Apparatus for Imparting Rapid Speed to a Mass of Fluid


USP #2,920,448 ~ Apparatus for Imparting Rapid Speed to a Mass of Fluid



USP # 2,939,654 ~ Device for Simultaneous Control of Lifting & Directional Elements


USP #2,964,306 ~ Thermo-Blower



USP # 2,988,139 ~ Spraying Device


USP # 2,988,303 ~ Jet-Sustained Aircraft


USP #2,990,103 ~ Jet Exhauster


USP #3,047,208 ~ Device for Imparting Movement to Gases


USP #3,261,162 ~ Lifting Apparatus


USP # 3,284,318 ~ Apparatus for Recovering Heat Released by Condensation of a Vaporized Liquid
(Does not use the Coanda Effect)


USP # 3,321,891 ~ Apparatus for Transporting Atomizable Material


USP #3,337,121 ~ Fluid Propulsion System


USP #3,410,758 ~ Water-Purifying Apparatus


USP #3,685,614 ~ Method & Apparatus for Attenuating Noise...


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 # 4,568,042~ Carr, Robert: Internal Wing Aircraft (*** Outstanding)



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,
THE BERNOULLI EQUATION, AND THE COANDA EFFECT © 1994 by Jef Raskin ...
www.jefraskin.com/forjef2/jefweb-compiled/ published/coanda_effect.html - 101k

Jef Raskin's Webpage Site Directory CoandaEffect: Understanding Why Wings
Work, MODEL AIRPLANES, THE ... aerodynamic effects. THE COANDA EFFECT. 9. If ...
www.jefraskin.com/forjef/jefweb-compiled/ published/coanda_effect.html - 101k

The "Coanda Effect". History of The "CoandaEffect". Article Contact Information
Split-Cycle Technology Ltd. Email Split Cycle Technology. ... The Coanda Effect. ...
www.geocities.com/ResearchTriangle/Lab/1135/coanda.htm - 23k

The Coanda Effect. By ... The CoandaEffect has been discovered in1930 by
the Romanian aerodynamicist Henri-Marie Coanda (1885-1972). He ...
jnaudin.free.fr/html/coanda.htm - 4k

The "CoandaEffect". History of The "Coanda Effect".
Article Contact Information Split-Cycle Technology Ltd. ... The Coanda Effect. ...
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Using The Coanda Effect Jet engine technologies for interested amateurs
Last Updated: 6 November, 2002 ... What Is The CoandaEffect? ...
www.aardvark.co.nz/pjet/coanda.shtml - 11k - Jun 29, 2003

CoandaEffect -- from Eric Weisstein's World of Physics
... Alphabetical Index. About this site. Experimental Physics >, Effects v. Fluid
Mechanics >, Boundary Layers v. CoandaEffect, The phenomenon of wall attachment. ...
scienceworld.wolfram.com/physics/CoandaEffect.html - 12k

... Coanda Effect Ducted Rocket ( Aaron 11/27/2002 4:40:15 PM ) (226). Re:Coanda
Effect Ducted Rocket ( Bruno Ogorelec 11/27/2002 6:49:40 PM ) (156). ...
www.pulse-jets.com/forum.asp?forum=ramjet - 54k - Jun 29, 2003

Prediction of Coanda effect flow fields. ABSTRACT. ... This paper reports on the
work which has been undertaken with an extended Coandaeffect model. ...
www.thermofluids.co.uk/Abstracts/Abstract6.htm - 3k

Modelling of Coanda effect devices using PHOENICS. ... A design tool has been produced
for internal axisymmetric and plane two dimensional Coandaeffect nozzles. ...
www.thermofluids.co.uk/Abstracts/Abstract5.htm - 2k

Current Research Projects - Coanda Effect
... Projects. CoandaEffect. The Coanda effect is named after a Romanian
Engineer Henri Coanda (1885-1975), who researched aeronautics. ...
web.bham.ac.uk/M.L.Wyszynski/ currentprojects/coanda.html - 2k

The Coanda Flying Saucer, "The Repulsin" type A
... above the surface by the Coanda effect. The radial air pressure required
for lifting 1kg with the CoandaEffect is about 1,4 kg/cm 2. ...
jnaudin.free.fr/html/repcotst.htm - 8k - Cached - Similar pages
[ More results from jnaudin.free.fr ]

CoandaEffect - Wikipedia
Coanda Effect. ... Contrary to popular misconception, it is the Coanda effect that
provides the majority of an airfoil's lift, not Bernoulli's principle. ...
www.wikipedia.org/wiki/Coanda_Effect - 11k - Cached - Similar pages

CoandaEffect: Understanding Why Wings Work
MODEL AIRPLANES, THE BERNOULLI EQUATION, AND THE COANDAEFFECT © 1994
by Jef Raskin "In aerodynamics ... effects. THE COANDAEFFECT. 9. If ...
humane.sourceforge.net/main/published/ coanda_effect.html - 101k - Cached - Similar pages

Jef Raskin - Coanda Effect: Understanding Why Wings Work
Jef Raskin Logo, MODEL AIRPLANES, THE BERNOULLI EQUATION, AND THE COANDA
EFFECT © 1994 by Jef Raskin "In ... effects. THE COANDA EFFECT. 9. ...
humane.sourceforge.net/published/coanda_effect.html - 101k

Use of the Coanda effect for obtaining jet deflection and lift with a single
flat-plate deflection surface. Von Glahn, Uwe H NACA TN-4272 June 1958 ...
naca.larc.nasa.gov/reports/1958/naca-tn-4272/ - 3k

Nexus - How Come?: Coanda Effect
21 October 2002. Today I ... fly…. What Is The CoandaEffect? This ...
abcasiapacific.com/nexus/stories/s704526.htm - 25k

MYCOM THERMO-JACK FREEZER, COANDA EFFECT
MYCOM FREEZER SYSTEM. MYCOM THERMO-JACK FREEZER MYCOM THERMO-JACK FREEZER.
STEEL BELT TYPE, MSF-TJ SERIES. CONCEPT OF MYCOM THERMO-JACK FREEZER. ...
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MYCOM THEMO-JACK FREEZER, COANDA EFFECT
MYCOM FREEZER SYSTEM. MYCOM THERMO-JACK FREEZER AIR-FLOW for THERMO-JACK
STEEL BELT FREEZER. GENERAL VIEW OF MSF-TJ SERIES.
www.mycomj.co.jp/eindex/jack/jack2.htm - 4k

The CoandaEffect
... The "Coanda Effect". History of The "Coanda Effect". I came across this
device recently and hope you find it interesting also. ... The Coanda Effect. ...
www.fortunecity.com/greenfield/bp/16/coanda.html - 23k

HAUG Air Knife ... Effect. The CoandaEffect In contrast to full flow nozzles, ionized air
is discharged from a slotted nozzle, creating a flat jet flow. ...
www.haug-static.com/Haug_Air_Knife.htm - 19k

CoandaEffect - Eduseek
Home, Subjects, Help, Age Groups. Subjects > Science > Science - 16+ > Physics
- Physical Processes > Fluid Dynamics > Boundary Layers > Coanda Effect, Links. ...
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Technolgy Plans
Technolgy Plans Product listing CoandaEffect. CoandaEffect, QTY:
#ID: C5 ESC PRICE: $22.50. This effect is produced when a liquid ...
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Critque of "How Airplanes Fly" ... 6) The paper cites the Coandaeffect as a plausibility argument in favor of the
scoop theory. ... The Coandaeffect is just not a good model for how wings work. ...
www.monmouth.com/~jsd/fly/lift.htm - 14k

Coanda-Soliton Effect
... The Coanda effect was unknown to me until seven years ago, when in an issue of UFO
Universe Magazine, it was mentioned in relevance to Nazi saucer research of ...
www.angelfire.com/mt/montalk/coanda.html - 13k

Kitchens .com - Gaggeanau
GAGGENAU THE PROFESSIONAL KITCHEN VENTILATOR HOOD AH 360-720 WITH "COANDA EFFECT"
FACILITATES VAPOR EXTRACTION WITH OPTIMUM EFFICIENCY: No Other Hood Works ...
www.kitchens.com/Remodeling-And-Design/Products-and-materials/ new-product-news/appliances-Gaggeanau.htm - 33k

Science Experiment - Shiver me timbers, blow me down (The Coanda ...
The Coanda Effect. Sound complicated? ... In this experiment we demonstrate the second
explanation - the CoandaEffect. Light a candle and place it on a table. ...
www.spartechsoftware.com/reeko/Experiments/ ExpCandleBlowAroundCan.htm - 12k

Aeronautics - Henri Coanda
... 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 - Cached

Henri 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
Coanda effect, the tendency of a fluid jet to remain attached to a solid flow ...
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;
Coanda effect; discharge coefficients; Froude number; Reynolds number; Weber ...
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.doc

Figure 2 - Coanda Effect
... Figure 2 Coanda Effect. Back to Impact on System Design. The Trane
www.trane.com/commercial/library/vol29_2/figure2.asp - 13k

Caidin, Silver Bug and Coanda
... Caidin, Silver Bug. and the "CoandaEffect". ... The disc machine achieves its extraordinary
performance through a phenomena [sic] known as the 'CoandaEffect'.... ...
www.ufx.org/avro/indy/caidinsilverbug.htm - 8k

coanda-effect
coanda-effect. coanda-effect Looking for something like "coanda-effect"?
For detailed information on "coanda-effect" and similar ...
www.netroglycerine.com/links/coandaeffect.html - 2k

A Physical Description of Lift
... This description of lift is based primarily on Newton's three laws
and a phenomenon called the Coandaeffect. This ... Coanda Effect. A ...
www.aa.washington.edu/faculty/eberhardt/lift.htm - 42k

Eureka - new ideas in technology
... helicopters. The CoandaEffect is named after Henry Coanda, a young Romanian
Engineer who used the principle to power an aircraft in 1910. ...
www.eureka.findlay.co.uk/archive_features/ Arch_Fluid_power/coanda/coanda.htm - 12k

Paper Airfoil Aerodynamics
... This effect is known as the Coanda effect. Figure 4.2 and 4.3 show this
effect in action. ... Figure 4.3 -- The Coanda effect in action. ...
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.ppt

Henri Coanda was one of the pioneers of the Romanian aviation
... The most known, studied, and applied discovery is the "Coanda Effect". Made
this discovery while he was testing his jet airplane, Coanda-1910. ...
romania-on-line.net/halloffame/CoandaHenri.htm - 29k

Research in the ENERGY GROUP
... Self-cleaning Screen Using the CoandaEffect. ... Reference 9; Cherruault JE, Self-cleaning
Screen Using the Coanda Effect, M.Sc. Thesis, Sept. 1999 Return to Index. ...
www.rdg.ac.uk/energy/book/msc99.html - 16k

The PHOENICS Journal - vol 9, issue 2
... Abstract. Modelling CoandaEffect Flows using PHOENICS DG Gregory-Smith,
AG Smith, SC Cutbill and M. Tumelty pp 229-252 Abstract. ...
www.simuserve.com/cfd-shop/vol9-2.htm - 14k

The PHOENICS Journal - vol 6, issue 4
... Abstract. Prediction of Coanda Effect Flow Fields M. Kopmels and AG Smith
pp 408-426 Abstract. ... Prediction of CoandaEffect Flow Fields. M ...
www.simuserve.com/cfd-shop/vol6-4.htm - 13k

American Antigravity - Vortex Thruster Aircraft Technology
... The flow enters the swirler, acquires angular momentum and exits over the diffuser,
where it reverses direction (by the Coanda effect) and is ejected into the ...
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.pdf

Newsletter
*, Ping-Pong Ball Floating in the Air Quantitative Measurement of Coanda Effect
Around a Ball Using PIV. Naoko Tokugawa Fluid Science Research Center. ...
www.nal.go.jp/eng/newsletter/98autumn/m106.htm - 8k

CFD Review | Navy Successfully Simulates Effect that May Improve ...
... The Coanda effect. ... Amazed by what was going on -- which is now known as the Coanda
effect -- he failed to notice that he was headed straight for a wall. ...
www.cfdreview.com/application/03/03/27/1716250.shtml - 41k

Bifurcation and the CoandaEffect. It is difficult to read current fluid dynamic
literature without coming across the terms bifurcation and chaos. ...
www.sjc.ox.ac.uk/scr/sobey/bce.html - 3k

Aeronautics
... An effect known as the CoandaEffect assists this. The Coanda Effect is a property
of the viscosity of fluids in which a fluid tends to "stick" to an object. ...
mainland.cctt.org/istf2003/flight.asp - 15k

Encyclopedia of free energy free energy articles,documents ect
... Pages 1--15 from Radiant Energy Research Manual 2.0.1. The "Coanda Effect" A
History of The "Coanda Effect". Some Notes about three-phase rectification. ...
www.geocities.com/ResearchTriangle/ Lab/1135/newstuff.html - 12k

How Airplanes Fly
... Science Literature Article about CoandaEffect "How Airplanes Fly: A Physical
Description of Lift" by David Anderson and Scott Eberhardt. ...
www.tli.unt.edu/library/planesfly/resource.html - 22k

[PDF]3096 UK Infant flow Brochure AW
File Format: PDF/Adobe Acrobat - View as HTML
... invasive method of respiratory support, working in harmony with the infant's own
respiratory efforts, by using Fluidic Flip technology and the Coanda Effect. ...
www.eme-med.co.uk/products/product-29-45420.pdf

Tesla Turbine Myths
... Seeing the squabble over friction or adhesion when explaining the Tesla turbine,
I wonder if the Coanda effect, or some variant of it, figures in the behavior ...
my.execpc.com/~teba/debunk/lancaster - 11k

RunRyder - another NOTAR fuse on the way
... They tend to have small print area to produce a model of that size. How do the
viscous forces determine if the Coandaeffect is necessary or not? Thanks. ...
runryder.com/helicopter/t19898p2/ - 21k

The 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
by Thomas Young in 1800 Rediscovered by Coanda in 1910 Understood in ...
www.myfluidix.com/Materials/PDF/03_Physics_03.pdf

Wind mill based on Viktor Schaubergers vortex technique
... One secret of Viktor Schaubergers devices is the use of the Coanda effect.
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
 
 




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