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Topic: Vortex generator

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	Vortex generator - Wikipedia, the free encyclopedia
		Vortex generators are added to the front of a swept-wing in order to maintain steady airflow over the control surfaces at the rear of the wing.
		The purpose of the generators are to stick out of the stagnant air near the surface of the wing, and into the freely moving air outside the boundary layer.
		Most aircraft carry vane vortex generators from time of manufacture, but there are after-market suppliers who sell VG kits to improve the STOL performance of some light aircraft.
	en.wikipedia.org /wiki/Vortex_generator (326 words)

	Wind-US User's Guide - Keyword Reference, VORTEX
		Note that the vortex generator model is derived from experimental data taken at axial stations which were one chord length downstream of the trailing edge of the generators, and therefore the secondary velocities produced by the model simulate vortices at this station, rather than at the generator trailing edges.
		For example, for a vortex generator array at an i-interface boundary, the primary flow is in the i direction, and the secondary velocity is in the j and k directions.
		The angle of incidence of the generator in degrees.
	www.grc.nasa.gov /WWW/winddocs/user/keywords/vg.html (1113 words)

	Aerospaceweb.org \| Ask Us - Vortex Generators
		Three sets of vortex generators are used along the Javelin's outer wing with one set located near the leading edge, another just before the ailerons, and a third set in between.
		To correct this problem, vortex generators are often placed just ahead of the control surfaces to create a faster flow of air over the surfaces and increase their effectiveness.
		In the case of the C-17, the vortex generators are located on the sides of the engine nacelles rather than on the wings but they still produce the same beneficial effects.
	www.aerospaceweb.org /question/aerodynamics/q0009.shtml (959 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		A second embodiment of the vortex generator is shown in Figure 4 having a housing 130 receiving a refill 128 and having a vortex cone 114 on the front surface and controls 126 mounted on the side.
		The waveform generated by diaphragm 716 carries the active concentration out of the outlet where, upon leaving the outlet, the waveform is transformed into a vortex and the bolus carries the concentration produced by the wick 732.
		The vortex generator of claim 14, wherein said diaphragm actuator comprises a foot pedal actuator having a striker, said striker moved toward the diaphragm by a motor and away from said diaphragm by a return spring.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=04/71541.040826&ELEMENT_SET=DECL (3033 words)

	[No title] (Site not responding. Last check: 2007-10-22)
		A vortex sensor detects vortices generated by the vortex generator while a temperature sensor disposed at the streamlined body measures a temperature of fluid carried by the flowtube.
		Generally, the vortex flowmeter 10 includes a vortex sensor assembly 11 that includes appropriate mechanical and electrical elements to sense vortices 15 in a fluid 14 that flows through a conduit 16.
		The vortex flowmeter of claim 18, further comprising: a pressure sensor coupled to the circuit and disposed in the flowtube to measure a pressure of fluid carried by the flowtube.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=98/43051.981001&ELEMENT_SET=DECL (6967 words)

	Aerospaceweb.org \| Ask Us - Wing Vortex Devices
		These generators are mounted at an angle of attack to the airflow over the wing so that each creates a vortex off the exposed tip, much like a trailing vortex created by a wing.
		Vortex generators are typically used in a series to create a number of small vortices over a large portion of wing.
		However, conventional vortex generators are quite common on airliners to increase the effectiveness of flaps and other control surfaces during takeoff and landing.
	www.aerospaceweb.org /question/aerodynamics/q0228.shtml (981 words)

	Ground and Cross-Shear Effects on Wing-tip Vortices (Site not responding. Last check: 2007-10-22)
		A slotted-jet vortex generator was used to form a 2-dimensional vortex pair.
		The perturbations of the primary vortex in the inviscid region of the boundary layer create an adverse wall pressure gradient slightly ahead of the primary vortex core, which retards the flow in the viscous local shear layer at the viscous-inviscid interface.
		Cross shear was generated by recirculating a weakly stratified fluid in the tank [1].
	www.emicronano.com /efluids/gallery/shear_effect_wingtip.htm (348 words)

	Marshall
		Other flows with no large-scale vortex structures in the temporal mean velocity field exhibit coherent vortices that fluctuate in a manner that is either non-periodic or periodic with multiple periods, and cannot be made quasi-steady by coordinate translation and rotation.
		The form of turbulence near a columnar vortex is shown in Figure 1 for the three vorticity components and in Figure 2 for the vorticity magnitude.
		The length scales of the turbulence and the vortex response to the turbulence are investigated using the POD method, as shown in Figure 3.
	www.iihr.uiowa.edu /projects/Marshall.html (1165 words)

	AiRTX International :: How Vortex Tubes Work
		When compressed air is released into the tube through the vortex generator, you get hot air out of one end of the tube and cold air out the other.
		The vortex generator—an interchangeable, stationary part—regulates the volume of compressed air, allowing you to alter the air flows and temperature ranges you can produce with the tube.
		Cold fraction is also a function of the type of vortex generator that's in the tube, i.e., a "high cold fraction" or "low cold fraction" generator.
	www.airtxinternational.com /how_vortex_tubes_work.php (416 words)

	The Dual Vortex Generator (Site not responding. Last check: 2007-10-22)
		The purpose of this generator is to generate a sufficient torsion effect in B-Field so as to generate a bipolar magnetic vortex in the Aether itself.
		When the bipolar vortex is unbalanced it is also able to produce a thrust Vs the Aether medium due to differential pressure induced.
		In the double vortex generator the rotational energy begin very strong in the center and the rotational speed increase dramatically while the radius of the vortex decrease.
	jnaudin.free.fr /html/dvtgv1.htm (210 words)

	Dynamics of Vortex Rings
		The vortex generator is placed on the bottom of a large rectangular tank, oriented such that all vortex rings move upward.
		This secondary vortex is then advected by the local flow field of the primary vortex, and it increases in strength due to stretching around the core of the primary (second image).
		Due to viscosity the primary vortex weakens and usually it is too weak after the first shedding process to shed another vortex, and the vortex falls apart (last image).
	www.fluid.tue.nl /WDY/vort/vortrings/vortrings.html (774 words)

	Aeronautical Testing Service, Inc. Phone: (360) 435-8859, Fax: (360) 435-8870 (Site not responding. Last check: 2007-10-22)
		Vortex generators work by mixing high-energy fluid (free stream air in this case) with the lower energy fluid found near the skin surface, called the boundary layer.
		Technically speaking a vortex generator increases the mean streamwise momentum of the boundary layer by drawing in high momentum fluid from the free stream.
		Vortex generators can be used to improve the performance of aircraft in a variety of ways.
	www.aerotestsvc.com /vgfaq.html (384 words)

	[No title]
		However, the well-known phenomenon of vortex bursting, characterized by a sudden enlargement of the vortex core, may significantly reduce the ability of a vortex to move particulate matter.
		An enhanced understanding of the nature of vortex bursting is important to determine the limitations and suitability of delta wing vortex generation for passive snow removal.
		Our ultimate goal is to minimize or eliminate vortex bursting upstream from the point where the vortex impinges on the ground, in order to maximize the momentum of the vortex and thus its capacity for erosion.
	elecpress.monash.edu.au /ijfd/2001_vol5/paper3/j_pap_out.htm (2632 words)

	Vortex Generators (Site not responding. Last check: 2007-10-22)
		We discussed the background and theory of their vortex generators and they were nice enough to send me a set for a flight evaluation on a 260SE.
		In talking with the people at Micro Dynamics about their vortex generators the theory behind their generators seemed to be relatively simple.
		The vortex generators are designed to help smooth the airflow over the upper wing surfaces, controls, etc at high angles of attack (on this particular airframe).
	www.keithmo.com /Html/Aviation/260SE/Todd/vortex.html (2499 words)

	Low Speed Aerodynamics Research Group - Helicopter main rotor blade vortex interaction (Site not responding. Last check: 2007-10-22)
		The vortex generator comprised of two adjoining NACA 0015 aerofoil sections spanning the height of the test section 2.1 rotor radii upstream of the rotor hub.
		The vortex strength was controlled by setting the two sections of the vortex generator at equal but opposite incidence.
		The horizontal position of the vortex generator (Zv) was altered to control the angle of intersection between the interaction vortex and the blade, resulting in either a nominally parallel or oblique BVI.
	www.aero.gla.ac.uk /Research/LowSpeedAero/Oldbvi.htm (1019 words)

	Welcome to Adobe GoLive 5
		Vortex heat-generator represents the cylindrical body equipped with the special internal device with a composite vortex pathway of passing of fluid.
		Generators with a heating power from 1 up to 300 kW, with electrical actuator or operating with an internal combustion engine are tendered to the consumer.
		And, even generators of 1-st generation (including not licensed), on accounts of the member of board of the national experts at Government of Russian Federation, the doctor of engineering science V. Sharkov, have quite good characteristics.
	www.sociym.ru /engl/envichrevie1.html (1627 words)

	Speedskating Santa Barbara -- Vortex Generators
		Without vortex generation (left) the streamlines separate from the wing before reaching the downstream edge.
		The series of vortex generators are attached to the top-front of the wing on an airplane.
		The vortex is like a twisting rubber band which twists outward and reconnects with the neighboring vortex generating a spinning donut.
	home1.gte.net /pjbemail/VortexGen.html (1233 words)

	www.500whp.com Turbo Aftermarket Performance Vehicle Parts
		The Vortex generator was designed to help with the effects of aerodynamics on the rear of the Mitsubishi Lancer Evolution.
		By the use of vortex generators across the trailing edge of the roofline, the velocity of airflow is increased and this allows the turbulent effect to be pushed rearwards.
		The vortex generator can add up to about 7lbs of downforce at crusing speeds, and up to 42lbs at 150mph+, all while reducing the effects of wind drag.
	www.500whp.com /catalog/product_info.php?cPath=88_26_338_456&products_id=1262 (150 words)

	What is a vortex and a vortex-generator? (Site not responding. Last check: 2007-10-22)
		We are constantly surrounded by vortexes, such as tornadoes and spiral galaxies; the Milky-Way is one example.
		When a vortex is generated, these impulses are amplified and prepared, so that they can more easily be perceived by the human conciousness.
		This means that it produces and projects a vortex which is capable of balancing other types of vortexes, such as chakras.
	home.wolfsburg.de /schaefer/vortex.htm (384 words)

	The Handley-Page Victor
		HP.88 design and construction was farmed out to General Aircraft LTD. General Aircraft obtained a fuselage for the Attacker jet fighter from Supermarine and refitted it with a crescent wing and a tee tail.
		General Aircraft had been bought out by Blackburn by this time, and Blackburn test pilot G.R.I. Parker was at the controls.
		Ejection seats were only provided for the pilot and copilot, on the basis that they would generally stay with the aircraft until the rest of the crew got out.
	www.vectorsite.net /avvictor.html (3268 words)

	Cornell FDRL [Research: Fundamental Vortex Interactions]
		The vortex pair flow provides a prototype system for the detailed study of elementary vortex interactions, whose knowledge may help to understand certain aspects of the observed statistical properties of turbulent flows, from the point of view of dynamics of coherent structures.
		We find that the internal deformations of a vortex develop a structure which is beautifully predicted by a theory, hitherto not linked to this problem, namely "elliptic instability".
		We have been extending this work to co-rotating vortices, studying initially the problem of vortex merging, and to vortex pairs which approach a ground plane, where we are interested in how vortices undergoing three-dimensional instability, at different stages of its development, are then influenced by the ground.
	www.mae.cornell.edu /fdrl/research/vortex_interactions.html (589 words)

	New-Vortex
		With customers all over the world CCI continues to be the world's leading manufacturer of molded vortex generators for laminar flow enhancement and drag reduction on aircraft.
		Specially engineered for aircraft applications, the 1" long by 0.40" high device is injection molded from UV stable General Electric polycarbonate.The "sail" is engineered to be stiff enough to impart the desired energy into the boundary layer but flexible enough to resist breakage from hanger rash and curious onlookers.
		These vortex generators are intended for use on aircraft certificated in the Experimental category.
	abianconi.hypermart.net /Vortex.htm (1221 words)

	Thoughts
		Infact if you will do the experiment that is on the first pages of the 785p Vortex Generator plans you will find that you get about 25 times more energy output, this is why we stated this on the web.
		Vortex Energy works together with Radiant Energy, I do not like to call Radiant Energy Aether energy, it is wrong to call it that.
		The DC Vortex Motor, The Ed gray Engine, The Joe Newman Motor, T. Henry Morray, and Teslas Free Energy devices are all related, They use Radiant Energy and Vortex Energy which you do not know much about.
	www.theverylastpageoftheinternet.com /menu/scams/fuelessthoughts.htm (3440 words)

	MY TORNADO VORTEX GENERATOR
		I can remember my first when I was having a campfire when used motor oil got spilled and caught fire and I placed a piece sheet metal rolled into a cylinder with a vertical slit over the fire.
		At that instant a vortex of fire formed and was twisting about with fury in the chamber.
		The picture on the right shows my first water vapor vortex and if you look closely you can see the vertical slit running the length of the chamber.
	www.geocities.com /bowlturner/intro_to_tornado_generator.html (507 words)

	ElantraXD.com - Dedicated to the true Elantra Enthusiast - Vortex Generator - Evo MR
		Mitsu cars are generally not very impressive, but I think their experience on the WRC track gives them just a tad bit of credibility with this car and their choices for performance enhancements.
		The gains with this mod are small, but if you look at the MR generally, small improvements are what they were shooting for, as the previous generation was a competent racer to say the least.
		The concept of vortex generators is not new, this article shows the application in the aviation industry: http://www.aerospaceweb.org/questio...ics/q0009.shtml However seeing it on a car like this is new (I'm probably wrong here) and while you may think it's ugly, I don't.
	www.elantraxd.com /forums/showthread.php?t=4326 (1564 words)

	Bill Grundmann's PS99 Vortex Ring Generator
		The PS99 Vortex Ring Generator (VRG) stands 5'8" tall and is 38" deep.
		Although devices like this are sometimes called a vortex cannon, this is really less like a cannon and more like a big box with a hole in it.
		The vortex generator is operated manually by pushing in the large membrane on the back of the unit.
	home.comcast.net /~t129wojce647/vger (2029 words)

	Vortex Ring / Wall Interactions
		Smoke rings are probably the most commonly seen form of vortex ring, although if you allow a drop of cream to fall into a glass of water while watching it from the side or top, you'll see a vortex ring form there, too.
		In our experiments when a stable vortex ring interacts with a wall that is 3 diameters or less away from the tip of the vortex ring tube, the secondary and tertiary vortex rings rebound so strongly that they actually travel up and out, toward the top of our tank (e).
		We generally configure our experiments to give a 15 pixel maximum displacement, so a typical MTV experiment has a dynamic range of 150:1, and 30 or 60 velocity fields are acquired per second.
	www.egr.msu.edu /tmual/CHuck/ring.html (930 words)

	[No title]
		Generally considered to be the most evolved and wise soul of all the Minbari.
		(118) Vortex Generator A large device which creates an entry to or exit from hyperspace so that ships which cannot afford to carry their own jump point generators can benefit from hyperspace travel.
		Only very large ships carry their own generators, and use them only when a local Vortex Generator is unavailable.
	www.midwinter.com /b5/b5encyc.txt (6529 words)

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