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	Venturi effect Summary
		A Venturi meter is shown in a diagram, the pressure in "1" conditions is higher than "2", and the relationship between the fluid speed in "2" and "1" respectively, is the same as for pressure.
		The Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it.
		The limiting case of the Venturi effect is choked flow, in which a constriction in a pipe or channel limits the total flow rate through the channel, because the pressure cannot drop below zero in the constriction.
	www.bookrags.com /Venturi_effect (924 words)

	NationMaster - Encyclopedia: Venturi
		Venturi are more expensive to construct than a simple orifice plate which uses the same principle as a Venturi, but the orifice plate causes significantly more permanent energy loss and is less accurate.
		Fluid dynamics The Venturi effect is a special case of Bernoullis principle, in the case of fluid or air flow through a tube or pipe with a constriction in it.
		Venturi was a controversial critic of the purely functional and spare designs of modern orthodox architecture and was considered a counterrevolutionary.
	www.nationmaster.com /encyclopedia/Venturi (538 words)

	The Dispatch - Serving the Lexington, NC - News (Site not responding. Last check: 2007-10-25)
		The Venturi effect is a special case of Bernoulli's principle, in the case of fluid or air flow through a tube or pipe with a constriction in it.
		The limiting case of the Venturi effect is choked flow, in which a constriction in a pipe or channel limits the total flow rate through the channel, because the pressure cannot drop below zero in the constriction.
		Venturi tubes are also used to measure the speed of a fluid, by measuring pressure changes at different segments of the device.
	www.the-dispatch.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=Venturi_effect (660 words)

	pomo.2
		Venturi's book sought to reinsert architecture and architectural principles into the mainstream; and by the 1960s, the mainstream was to be defined in terms of popular culture.
		Venturi's efforts to study and theorise popular culture reveal it to be an incredibly resistant construct to such efforts - popular culture is everything that an academic approach is not: irreverent, unconscious, unthinking, irrational, inexplicable, and completely without the desire or much less the capacity to justify its behaviour or motivations.
		Venturi's response to Rudolph's lead is more condemning: `He [the architect] can exclude important considerations only at the risk of separating architecture from the experience of life and needs of society.
	rubens.anu.edu.au /htdocs/bytype/arch.sources/venturi.html (3649 words)

	It’s Not Your Father’s Vacuum Pump Anymore. . . . by Winn Hardin - Robotics Online
		A Venturi effect is generated by forcing compressed air through a narrow opening into a larger cavity, causing a condition of low pressure in the cavity.
		EOT Venturi vacuum pumps at the end of the robotic arm often require optional proximity or vacuum sensors at the EOT, however, their lower capital cost compared with a centralized vacuum generator located on the floor or nearby housing allows for the additional cost.
		The lower cost afforded by EOT Venturi systems allows the integrator to provide independent vacuum sources for each cup or groups of cups without using additional valve controls and tubing as would be the case with centralized vacuum pumps and generators.
	www.roboticsonline.com /public/articles/details.cfm?id=1095 (1498 words)

	Googlism : what is venturi effect
		venturi effect is that the pressure on the walls of the tube in the restricted area is reduced
		venturi effect is a basic aerodynamic law that describes a pressure drop across a surface where a fluid is moving with a higher relative velocity
		venturi effect is used to entrain and mix the entering fluid with a proportion of the tank contents
	www.googlism.com /what_is/v/venturi_effect (820 words)

	New Page
		A venturi effect is used by the carburetor to mix gasoline with air.
		To ensure that there is a high degree of atomization, a tiny hole called an air bleed is used to allow air to mix with the fuel in the discharge tube.
		To ensure proper fuel flow, a secondary venturi or a venturi booster may be used.
	www.free-ed.net /sweethaven/MechTech/EngineMech/EngMech01_Main.asp?iNum=0208 (768 words)

	Science Fair Projects - Venturi effect
		The Venturi effect is the speeding up of air, or another fluid, as it passes through a constriction.
		The effect is visible in the capillaries of the human circulatory system or in large cities where wind is forced between buildings.
		This effect is also fundamental in in carburetors.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Venturi_effect (238 words)

	Aeronautics.ws - Aeronautical Engineering Blunder #5
		With the venturi in place and located at the outlet end of the wind tunnel the flow was restricted to 1/3 normal flow (area of wind tunnel end reduced from 36 square inches to 12 square inches).
		In carbureted engines the venturi has been the design and explanation for the transferring of gasoline from the float chamber(s) to the air flow through the carburetor throat, where it mixes with the air flow, vaporizes, and becomes a combustible mixture when compressed in the cylinders.
		The "venturi" actually slows the air flow through the carburetor, increasing the air stream pressure in the area of the "venturi" over what it would have been if there were no restriction to air flow.
	www.aeronautics.ws /blunder5.html (1284 words)

	Incorrect Lift Theory
		The theory is based on the idea that the airfoil upper surface is shaped to act as a nozzle which accelerates the flow.
		Considering the conservation of mass, the mass flowing past any point in the nozzle is a constant; the mass flow rate of a Venturi nozzle is a constant.
		The problem with the "Venturi" theory is that it attempts to provide us with the velocity based on an incorrect assumption (the constriction of the flow produces the velocity field).
	www.grc.nasa.gov /WWW/K-12/airplane/wrong3.html (798 words)

	Professor Flow
		According to the venturi principal, the output pressure will be the same as the input pressure; the pressure will only change in the venturi itself (since the product of velocity and pressure stays constant throughout the line).
		But I see the the venturi as a constriction, almost like a valve, which should case a pressure drop at its output, since it should have the same effect a valve has when you close it half way.
		However, because of frictional effects in the fluid, the pressure leaving the diverging section is always less than P1, the pressure entering the meter.
	www.flowmeterdirectory.com /professor_flow_001.html (1560 words)

	WirelessReady® Alliance (Site not responding. Last check: 2007-10-25)
		Venturi Wireless, the pioneer and leader in wireless network acceleration solutions, enables mobile operators to successfully drive the adoption of wireless data services.
		The name Venturi is derived from the scientific Venturi Effect, a process whereby fluids traveling through a narrowing tube are accelerated, resulting in an increase in velocity and a decrease in pressure.
		Venturi Accelerators have the same effect on data transmitted over wireless networks, dramatically increasing access speed to the end user (velocity) and reducing the overall traffic on the network (decreasing the pressure).
	www.wirelessready.org /memmpVen.asp (311 words)

	Venturi effect
		To avoid undue drag, a venturi tube typically has an entry cone of 30 degrees and an exit cone of 5 degrees.
		Venturi tubes are more expensive to construct than a simple orifice plate which uses the same principle as a tubular scheme, but the orifice plate causes significantly more permanent energy loss and is less accurate.
		Buchner funnels that use the Venturi effect to provide the suction on force against the contents of the funnel
	www.dejavu.org /cgi-bin/get.cgi?ver=93&url=http://articles.gourt.com/%22http%3A%2F%2Farticles.gourt.com%2F%3Farticle%3DVenturi (632 words)

	Venturi effect at fan intake - Refrigeration-Engineer.com forums
		I don't think I understand you question about testing the Venturi effect, but a venturi is a tapering section within a ductwork or pipework length where the fluid flow is "squeezed" because the cross sectional area is reduced.
		This has the effect of increasing the velocity, as the same volume of fluid passing through the preceeding ductwork or pipework now has to pass through a smaller cross sectional area.
		If the two probes are connected to a device (a manometer) so that the pressures oppose one another, the effect is to subtract the static pressure from the total pressure picked up by the first probe and the resultant reading gives the velocity pressure.
	www.refrigeration-engineer.com /forums/showthread.php?t=774 (688 words)

	Venturi Aeration: Innovative Technologies in Liquids Treatment. "Wastewater" Page.
		This enables the supernatant to be returned to the headworks without any upsets, shock, or other deleterious effects.
		As the sludge passes through the Venturi- Aeration nozzle at 54 fps and contacts the aspirated air immediately downstream from the nozzle, the mixture of sludge and air is subjected to a negative pressure of 14 psig due to the sudden pressure release and subsequent expansion of the sludge mixture.
		Venturi Aeration, Inc. routinely specifies Gorman-Rupp T Series pumps for this application because of their simplicity of design, reliability and ease of maintenance.
	www.venturi-aeration.com /aerobicdigestion.htm (1182 words)

	Page a9 C. H.
		(Venturi effect can be demonstrated by holding two pieces of binder paper vertically about three inches apart and blowing between them.) This can adhere to the metal parts of the carburetor particularly the butterfly valve which is the throttle control.
		The initial effect of adding carburetor heat will be an even greater loss of power, soon to be followed by a rough running engine, and an increase in rpm as ice is removed as water.
		Since the effects of power are so variable, due to inertia, most pilots chose to set power at predetermined levels and use the elevator to set the trim to give the attitude most likely to meet the airspeed sought.
	whitts.alioth.net /Pagea9C.H.htm (9034 words)

	High Lift Devices for Racing Cars Aerodynamics
		End plates (side fins) are mounted on low aspect-ratio wings to reduce the three-dimensional effects on the wing, by creating a physical bound to the tip flow that would tend to spill from the pressure to the suction side of the wing.
		Their effect is a function of their size as compared to the wing size.
		This is in fact the nozzle effect (or Venturi effect), when flow in a convergent nozzle accelerates and looses pressure.
	www.aerodyn.org /Annexes/Racing/hlifts.html (688 words)

	Flexible valve for administering constant flow rates of medicine from a nebulizer - Patent 5655520
		The Venturi effect simply stated is the faster the flow rate, the lower the pressure inside a pipe.
		During heavy inhalation, a pressure differential and the Venturi effect causes the flexible walls of the flow regulating valve to collapse.
		The effects of regulating the inspiratory flow rate (0.25 L/sec) with a newly created valve and fixation of the nebulizer straw and baffle position were studied as means of enhancing the output reproducibility of the DeVilbis 646 nebulizer when used with a Dosimeter.
	www.freepatentsonline.com /5655520.html (4923 words)

	AIR-VAC Air Venturi Pumps
		These are simple vacuum pumps based on a venturi airflow design that can be used for vacuum pressures up to 28" of mercury vacuum.
		This principle was discovered by a 18th century physicist, G. Venturi and can be applied to generate vacuum economically without a single moving part.
		There is no RF noise generated to effect electrical or electronic systems.
	www.hyvac.com /Products/O_pumps/Air%20Venturi/Air_Venturi_vacuum.htm (659 words)

	Dellorto Motorcycle Carburetor Tuning Guide (Site not responding. Last check: 2007-10-25)
		In the Carburetor, the venturi is the part which allows the conversion of some of the kinetic energy of the air passing through into pressure energy.
		Usually the choke is shaped like a tube with a converging-diverging venturi section; in the restricted section or throat, the air pressure becomes lower, causing an influx of fuel upwards through the jets and orifices.
		In the tapered-needle type Carburetor, the choke size is the diameter of the section immediately upstream or downstream of the throttle valve and its size is cast on the nameplate together with the model type of Carburetor eg PHBE 36BS signifies a 36 mm venturi Carburetor.
	www.ducatimeccanica.com /dellorto_guide/dellorto_3_1.html (496 words)

	High Lift Devices for Racing Cars Aerodynamics
		End plates (side fins) are mounted on low aspect-ratio wings to reduce the three-dimensional effects on the wing, by creating a physical bound to the tip flow that would tend to spill from the pressure to the suction side of the wing.
		Their effect is a function of their size as compared to the wing size.
		This is in fact the nozzle effect (or Venturi effect), when flow in a convergent nozzle accelerates and looses pressure.
	aerodyn.org /Annexes/Racing/hlifts.html (688 words)

	Venturi effect charging system for automobile batteries (US5280827)
		A long venturi tube extends along the upper portion of the vehicle above the passenger cab and directs air flow from the front of the vehicle and impinges it upon an upper portion of the turbine blades.
		A pair of elongated lower screw-type turbines are contained in separate lower venturi effect tubes extending along the lower side of the vehicle below the passenger cab.
		Air from the lower venturi effect tubes is impinged upon the large turbine in a direction and at a location to increase the force generated from the upper venturi tube.
	www.delphion.com /details?pn10=US05280827 (247 words)

	Gould Engineering Bazooka Dredge
		The Venturi principle is the key to making the suction generator work and the principle has been known and applied for many years.
		Since this was a 4.0" dredge with a venturi jet generator, I based the jet opening to be the same square inch area of a 1.0" jet that was used on the straight jet.
		The action is fairly simple; it is the effect of a high-pressure stream of water impacting upon the column of water and material in the venturi generating tube.
	www.gouldeng.com /stech.htm (5538 words)

	Cvcarbs
		Air now speeds through and venturi effect (depression) at the point of the slide (variable venturi) is created.
		Typically, the butterfly is set a tad open to permit just a slight amount of air to pass by at the bottom to support idle and decel, and most of the fuel for these functions is supplied through the pilot outlet.
		But as the butterfly is opened, more air flows past it, and the venturi effect starts to work on the bypass Additional fuel is now drawn out of the bypass to support low speed running and cruising at small throttle openings.
	www.drpiston.com /Cvcarbs.html (3988 words)

	Tekes teknologiapörssi - Hakutulokset
		The Venturi effect described above enables the Venturi turbine to generate a higher level of power at lower wind speeds, which is essential at a midland wind regime, where most of the applications will be found.
		Because the blades of the Venturi turbine are attached to the hub with both ends, the feet of the blade and the flexible blade itself are subjected to non-fluctuating tensile stresses only.
		The cantilevered construction of conventional blades cause the foot of the blade to be subjected to strongly alternating bending moments caused by fluctuating wind gusts and gyroscopic effects.
	www.tekes.fi /partner/fin/search/nayta_haku.asp?hakuid=28636 (998 words)

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