
	Where results make sense

Topic: EHD thrusters

Related Topics

Ion thruster

Air ioniser

Voltage

In the News (Fri 17 Feb 12)

EXECUTIVE POWER

Iran

ANALYSIS

Pakistan

Family compact

	RMCybernetics - Electropulsion
		EHD stands for Electro Hydro Dynamics which is the study of the flow of a fluid under the effect of an electric field.
		An EHD thruster is an electrohydrodynamic device which ionises air and moves the charged ion cloud in a way and direction to transfer momentum to neutral air molecules.
		An EHD thruster in its simplest form is made up of two electrodes, one with a sharp edge, the ioniser and one with a smooth edge, the collector, which when powered by a high dc voltage (a few kV) produces thrust against the surrounding medium, normally air.
	www.rmcybernetics.com /science/propulsion/ehdt.htm (2682 words)

	Electrohydrodynamic thruster - Wikipedia, the free encyclopedia
		The basic components of an EHD thruster are two: an ioniser and an ion accelerator.
		Unlike the ionocraft, within an EHD thruster, the air gap in its second stage is not restricted or related to the Corona discharge voltage of its ionising stage.
		The electrical to mechanical conversion efficiency is equal to the ratio of the velocity of the neutral fluid to that of the moving ions.
	en.wikipedia.org /wiki/Electrohydrodynamic_thruster (700 words)

	physics - EHD thruster
		An EHD thruster is a propulsion device based on ionic air propulsion, that works without moving parts, uses only electrical energy and is able to fly autonomously and carry additional cargo.
		The basic components of an EHD thruster are two: an air ioniser and an Ion accelerator.
		Unlike the Lifter, within an EHD thruster, the air gap in its second stage is not restricted or related to the Corona discharge voltage of its ionising stage.
	www.physicsdaily.com /physics/EHD_thrusters (541 words)

	Tags: thruster \| Dabble (Site not responding. Last check: 2007-11-03)
		Thruster 1 the thruster is a new kind of skateboard with a revolutionary truck system which feels like surfing/snowboarding, also this...
		Thruster 2 the thruster is a new kind of skateboard with a revolutionary truck system which feels like surfing/snowboarding, also this...
		Thruster Tst Microlight/ultralight Landing Just a short clip of a thruster TST landing with some sheep on the airfield.
	dabble.com /tag/thruster (214 words)

	Science Fair Projects - EHD thruster
		This is the general and most appropriate term used for high voltage propulsion devices in which, unlike their relative ion thruster family, do not need to carry their own gas supply, although they still require to carry their own electrical power source or generator.
		An EHD thruster is a propulsion device based on ionic air propulsion, that works without moving parts, uses only electrical energy and is able to fly autonomously and carry additional cargo.
		The ionocraft and the Lifter form part of this category, but their efficiency is severely limited to less than 1% energy conversion efficiency by the fact that the ioniser and accelerating mechanisms are not independent.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/EHD_thrusters (692 words)

	EHD Thrusters Research
		One of the important issues in the EHD thruster is the power required to generate the corona at its ion generating mechanism.
		Same reasoning applies to EHD thrusters, where most of the thrust is generated at the cross sectional interface between the ion cloud and neutral air molecules.
		EHD thrusters (lifters, ionocrafts..), Electrostatic precipitators, copy machines and arc welders are devices that produce some ozone as a by-product of their intended function.
	blazelabs.com /l-intro.asp (4583 words)

	EHD Thrusters Research
		One of the important issues in the EHD thruster is the power required to generate the corona at its ion generating mechanism.
		Same reasoning applies to EHD thrusters, where most of the thrust is generated at the cross sectional interface between the ion cloud and neutral air molecules.
		EHD thrusters (lifters, ionocrafts..), Electrostatic precipitators, copy machines and arc welders are devices that produce some ozone as a by-product of their intended function.
	www.blazelabs.com /l-intro.asp (4601 words)

	EHD (Electro Hydro Dynamic) 1
		EHD (Electro Hydro Dynamic) Thrusters are currently what amounts to a novel toy that demonstrates clearly a new form of transportation within the atmosphere that does not rely on chemical engines or rockets but instead uses only electricity.
		This makes (even though it is very under developed) EHD thrusters ideal for achieving earth orbit even though at the moment it still requires a fluid media (such as air) to generate the thrust that has been demonstrated.
		There is one Savior of Blaze Labs who has carried on with developments in EHD none the less and whom has also been doing what I consider very crucial experiments that are leading the way for this to be a useful technology.
	research.colloidalgoldmachines-central.com /EHD1.html (849 words)

	EHD Thrusters Research: Lifters in vacuum
		One has to understand that the lift mechanism is provided by the well known Coulomb's law of electrostatics acting on ions, and by the law of conservation of momentum, by which it transfers momentum to neutral air molecules.
		EHD thrusters can be designed in various shapes & sizes but in general they all have an ion emitter in the form of a fine wire, fixed over the collector, usually in the form of either an aluminium plate of foil with smooth round edge at the top or a mesh.
		It is also understood that the volume of neutral molecules effected will depend upon both EHD thruster's size and shape as well as on the actual flow profile of the neutral molecules.
	www.blazelabs.com /l-vacuum.asp (1837 words)

	Venik's Aviation - Plasma Stealth (Site not responding. Last check: 2007-11-03)
		Plasma exists at normal atmospheric pressure and serves as an electrohydrodynamic coupling layer between the artificially-generated (by the aircraft's onboard systems) electric field and the electrically neutral boundary layer.
		EHD coupling is also a method of propulsion as it can accelerate the boundary layer and outer flow.
		For a military aircraft, in our case, EHD methods could mean fewer control surfaces, higher angles of attack, extra thrust, greater speed and fuel efficiency, high combat survivability.
	www.aeronautics.ru /archive/plasma/index.htm (3164 words)

	MIFLUS - Microfluidics terminology
		The EHD static or injection pump is based on Coulomb´s force which is responsible for moving ions.
		The EHD dynamic or induction pump is based on the induced charge at the material interface.
		EHD dynamic pumps include pumps with layered fluids, pumps with suspended particles and pumps with anisotropy of fluid properties (temperature gradient).
	butler.cc.tut.fi /~kuncova/MIFLUS/microfluidics_terminology.php (15100 words)

	Thruster - hall thruster (Site not responding. Last check: 2007-11-03)
		For applications with insufficient draft for proper submergence of the tunnel thruster, a slow speed directional jet thruster is the answer.
		The position of the thruster can be forced to be at the object's center Thrust is on by default.
		Thruster Aircraft UK News and specs of the three axis microlight aircraft with nosewheel, taildragger and floatplane versions.
	infoseeknow.com /ifsn/thruster.htm (435 words)

	EHD thrusters research: EHD performance
		Since different EHD thrusters have usually different sizes, geometry, air gaps, voltages, weight and thrust, one may obviously find it difficult to determine the best performer in terms of thrust per unit length.
		Points 3 and 4 depend on the physical shape of the EHD thruster, which may be optimised to a certain point at which no further improvement would be possible.
		Point 2 can be utilised by somehow modifying the air taken in by the thruster into one with higher dielectric constant, but this would require extra tanks carrying the required 'dielectric fuel' to be injected.
	blazelabs.com /l-perf.asp (988 words)

	PowerPedia:Lifter - PESWiki
		The term "Lifter" dates back to the 1960s, an era in which EHD experiments were at their peak.
		It forms part of the EHD thruster family, but is a special case in which the ionisation and accelerating stages are combined into a single stage.
		Further study in electrohydrodynamics, however, show that different classes and construction methods of EHD thrusters and hybrid technology, put no limit to shape, size, payload or thrust-to-power ratio.
	peswiki.com /index.php?title=PowerPedia:Lifter&redirect=no (1951 words)

	Blaze Labs Research Pages
		EHD Thrusters research section contains a series of experimental EHD Thrusters or propulsion devices, also known as ionocrafts and lifters, that do not use conventional methods for thrust.
		In general, EHD thursters have an air ioniser in the form of a fine wire, fixed at a small distance (few cm) over the collector, usually in the form of an aluminium plate of foil with smooth round edge at the upper part.
		The thrusting mechanism is called Electrohydrodynamic (EHD) and is provided by the well known Coulomb's law of electrostatics acting on ion clouds, and by the law of conservation of momentum, by which it transfers momentum of these accelerating clouds to neutral air molecules.
	www.blazelabs.com (1519 words)

	Biefeld-Brown effect - Biefeld-Brown effect
		The effect is more widely referred to as electrohydrodynamics (EHD) or sometimes electro-fluid-dynamics, a counterpart to the well-known magneto-hydrodynamics.
		The effect relies on corona discharge, which allows air molecules to become ionized near sharp points and edges – this belief is perpetuated in the construction of pointy lightning rods historically (though rounded or spherical topped rods are better than the pointed rods).
		In the process, thousands of impacts occur between these charged ions and the neutral air molecules in the air gap, causing a transfer in momentum between the two, which creates a net directional force on the electrode setup.
	www.infotechloco.com /Biefeld-Brown-effect.htm (703 words)

	Halfbakery: EHD Thruster Cars
		The ion emitter is usually a string of wire with a high voltage positive charge, and the collector, located somewhere beneath the ion emmiter which is usually a rounded aluminum plate or mesh with a negative charge.
		If four of these thrusters were positioned at the outer points of a lightweight car-like vehicle, there is achance the thing will "levitate." There was once a full sized thruster called the Ionocraft, but I'm not sure about it, so don't take my word on it.
		The thrusters on the sides would have to protrude about a foot out from the body of the vehicle, so it wouldn't capsize, but protected by some kind of bumper, so they wouldn't break of, if hit.
	www.halfbakery.com /idea/EHD_20Thruster_20Cars (815 words)

	Biefeld–Brown effect - Wikipedia, the free encyclopedia
		Extensive research was performed during the 1950's and 1960's on the use of this electric propulsion effect during the publicized era of gravity control propulsion research.
		The effect has only recently become popular again and such flying devices are now known as EHD thrusters.
		This effect can be used for propulsion (see EHD thruster), fluid pumps and recently also in EHD cooling systems.
	en.wikipedia.org /wiki/Biefeld-Brown_effect (896 words)

	Specific Impule Variable » Magnetoplasma Impluse Specific Rocket - Specific (Site not responding. Last check: 2007-11-03)
		- EHD Thrusters Research: Autonomous thruster project: A much more important characteristic for interplanetary travel is a quantity called specific Impule, Specific Impluse is essentially an indication of how much a rocket's velocity can be increased by Variable Specific Impluse.
		The specific impulse is a measure of the thrust per unit of propellant that is expended, while thrust is a measure of the momentary or peak force supplied by a particular engine.
		In fact, propulsion systems with very high specific impulses (such as ion thrusters: 3000 seconds) produce low thrusts, due to the relatively high weight of power generators.
	www.newsbyaxe.net /motors/impulse-specific.htm (428 words)

	[No title]
		The EHD pump is designed to pump a fuel-air mixture in between the red and blue plates of the discharge plates.
		The FTA is statically stable due to all the aerodynamic forces acting through the center-of-pressure (CP) and pivots around the CG in away that reduces the angle-of-attack (a).
		Thrusters keep the prototype stable during flight when subjected to turbulence and crosswinds.
	www.stealthskater.com /Documents/FTA_02.doc (1926 words)

	Thruster Jet Force Water Flow, Tips and Info for Jet (Site not responding. Last check: 2007-11-03)
		Jet Measurements of Shear Lift Force on a Bubble in Channel Flow in Microgravity in the development of the water jet thruster of the OmniThruster Jet Thruster and it s implementation of a mixed flow This accelerated water mass.
		The CTU Thruster is designed for action ahead of the Thruster while applying thrust force as it simultaneously thrust and jet PIPELINES FLOW LINES CLEANING USING CTU JETTING.
		The CTU Thruster is designed for action ahead of the Thruster while applying thrust force as it simultaneously thrust and jet in the development of the water jet thruster of the OmniThruster Jet Thruster and it s implementation of a mixed flow This accelerated water mass.
	www.timewebportal.com /jet/thruster-jet-force-water-flow.php (706 words)

	Experiments: Experiment 01
		We had noticed that when powered on, an EHD thruster would 'feel' heavier if one tries to push it sideways.
		In this experiment I will show that the moment of inertia of the volume of air rotating within the EHD thruster is drastically increasing when the high voltage is applied, and then this extra 'mass effect' which is co-rotating with each element is immediately released to the environment when the electric field is switched off.
		The air between the outer electrodes of the thruster is thus forming invisible fibrous ionic structures, increasing the viscosity of the air itself, and thus slowing down the rotational motion.
	www.blazelabs.com /e-exp01.asp (2732 words)

	Fan Fiction Inspired by Halo
		Keys went to a accurate focused reticule, and aimed at the thrusters of Triggers ship.
		The rounds of ammunition went throught the back thrusters, through the engines, and caused a breech in Trigger's ship.
		He was almost killed by that last sesmic charge, but he fired his single thruster to use underside of the ship(Which was the only side that still ahd formitable armor on it) to take the damage.
	halosn.bungie.org /fanfic/?story=ehd.wingsofdeath9.html (2205 words)

	PowerPedia:Biefeld Brown effect - PESWiki
		The Biefeld–Brown effect is an effect that was discovered by Thomas Townsend Brown (USA) and Dr. Paul Alfred Biefeld (Switzerland).
		This effect can be used for propulsion (see thruster (http://en.wikipedia.org/wiki/EHD)) and fluid pumps.
		Testing the Miklos thruster (http://bmiklos2000.freeweb.hu/unipolar.htm) - Borbás Miklós has detected a force which appears counter to the typical 'lifter' theory.
	peswiki.com /index.php/PowerPedia:Biefeld_Brown_effect (903 words)

	Imaging On-Line Store
		Only recently, however, has electrohydro-dynamic jetting received any significant attention on the part of technical entrepreneurs, with the appearance of powder coating techniques, space thrusters and mass spectrometry based on this process.
		The geometry, the properties of the liquid, and the electrical excitation scheme required to optimize this jetting process for printing purposes were outlined previously.
		Printing of gray-scale (256 levels per print spot) fl and white images at a resolution of 300 dpi has been demonstrated as well.
	www.imaging.org /store/epub.cfm?abstrid=2108 (174 words)

	Project Joan Rosell
		This project is a patient study of the mechanisms responsible for various electrohydrodynamic (EHD) phenomena, with the ultimate intend of applying these flows to the generation of particles with diameters well under 1 micron.
		EHD flows are currently also being proposed as thrusters for attitude control of microsatellites, for fiber electrospinning in tissue engineering, for respiratory drug delivery, and as particle size standards in the sub-micrometric range, among other uses.
		Much work has been carried out over the years to try to understand the transport mechanisms (mass, momentum, energy, and charge) underlying electrospraying, [9] but most of it has centered on the “steady cone-jet” mode.
	www.etseq.urv.es /DEQ/Doctorat/index/running/2004_2006/projects_2004/Table2/project_rosell_04.htm (973 words)

	NASA seeks spaceship proposals (Site not responding. Last check: 2007-11-03)
		The high power helicon is a state of the art electrodeless plasma thruster.
		An EHD device uses a direct conversion of electrical energy into kinetic energy.
		The major push in advanced electric propulsion at this time is for the deployment of large plasma thrusters, with ever increasing power units and cost.
	www.freerepublic.com /focus/f-news/1323461/posts (7334 words)

Try your search on: Qwika (all wikis)