
	Where results make sense

Topic: Pulse detonation engine

Related Topics

Pulse jet engine

Turborocket

Jet engine

Turboshaft

Scramjet

Ramjet

Thermojet

Propfan

Supersonic travel

Turbojet

Liquid air cycle engine

Turbofan

Rocket engine

V1 missile

Miller cycle

In the News (Sun 29 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Pulse detonation engine and valve - Patent 7251928
		A pulse detonation engine disclosed in claim 3 comprising an intake to introduce air upstream of said combustor, wherein said oxidizer is compressed air obtained by ram-compression; and said pulse detonation engine is a pulse detonation ramjet engine in which a ramjet engine is integrated with a pulse detonation engine.
		Previously proposed pulse detonation engines provide an opening and closing valve in the combustor inlet for supply and control of the gaseous mixture to permit the cycle of filling with the gaseous mixture, its combustion and exhaust, however the outlet of the combustor communicates directly with the nozzle and is always open to atmosphere.
		In the pulse detonation engine 10 of the present embodiment, ram-compressed air received at the intake 11 is cooled by heat-exchange with a cryogenic coolant and increased in density, and supplied to the combustor (combustion tube) 15 via the supply valve 13.
	www.freepatentsonline.com /7251928.html (2611 words)

	Methods and apparatus for operating gas turbine engines - Patent 7007455
		A pulse detonator in accordance with claim 1 wherein at least one detonation tube comprises a length that is unequal to a length of at least one other detonation tube.
		Pulse detonation engines also may not suffer stall and startup problems that may be experienced by some known gas turbine engines because of separation in and around compressor blades within the conventional engines.
		Detonation tubes 58 are stacked in an array 76 within detonation chamber 62 such that a plurality of tubes 58 are spaced circumferentially around axis 60, and such that a plurality of tubes 58, or a portion of a plurality of tubes 58, are stacked radially outwardly from inner casing 56 to outer casing 54.
	www.freepatentsonline.com /7007455.html (2657 words)

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		Detonation is a process of supersonic combustion in which a shock wave is propagated forward due to energy release in a reaction zone behind it.
		For a self-propagating detonation, the shock relaxes to a speed given by the Chapman-Jouguet condition, which induces the material at the end of the reaction zone to have a locally sonic speed in the reference frame in which the shock is stationary.
		Detonation in reciprocating engines is the uncontrolled supersonic explosion of the fuel-air charge, and is caused by excessively high combustion chamber temperatures.
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=detonation (606 words)

	Pulse jet engine - Wikinfo
		A pulse jet engine is a very simple form of internal combustion engine wherein the combustion occurs in pulses and the propulsive effort is a reaction to the rearward flow of hot gasses.
		A pulse jet comprises an inlet arrangement, a one-way air inlet valve, a combustion chamber, and an (acoustically) resonant exhaust tube (tailpipe) with integral propelling nozzle.
		Pulse jets are mainly used today in model airplanes, though some experimenters continue to work on improved designs, including pulse detonation engines.
	www.wikinfo.org /wiki.php?title=Pulse_jet_engine (2947 words)

	Pulse detonation engine - Education - Information - Educational Resources - Encyclopedia - Music
		The pulse detonation engine is a concept currently in active development to create a jet engine that operates on the supersonic detonation of fuel.
		In the PDE the combustion process is supersonic, effectively an explosion instead of burning, and the shock wave of the combustion front inside the fuel serves the purpose of the shutters of a pulsejet.
		Key difficulties in pulse detonation engines are achieving DDT without requiring a tube long enough to make it impractical and drag-imposing on the aircract; reducing the noise (often described as sounding like a jackhammer); and damping the severe vibration caused by the operation of the engine.
	www.music.us /education/P/Pulse-detonation-engine.htm (1070 words)

	Pulse detonation engine - Uncyclopedia, the content-free encyclopedia
		It is hoped to be more environmentally friendly alternative to existing turbofan and turbojet engines, owing to the fact that it is powered entirely by the seeds of various legumes (in particular, lentils and baked beans in curry sauce).
		The PDE's rapid shock-wave inducing combustion makes them strong candidates for hypersonic flight applications; where their main competitor is the scramjet, which require fuels of much higher volatility.
		These engines are also notorious for their odour, due to the superheated non-combustible component of the charge, expelled from the engine every cycle.
	uncyclopedia.org /wiki/Pulse_detonation_engine (641 words)

	Spaceflight Now \| Breaking News \| New millennium concept: Rockets like auto engines
		Pulse detonation rocket engine technology is being developed for upper stages that boost satellites to higher orbits.
		Pulse detonation rocket engines operate by injecting propellants into long cylinders that are open on one end and closed on the other.
		Pulse detonation rocket engine technology is one of many propulsion alternatives being developed by the Marshall Center's Advanced Space Transportation Program to dramatically reduce the cost of space transportation.
	www.spaceflightnow.com /news/0002/28pulsedetonate (585 words)

	Pulse detonation engine Information
		A pulse detonation engine, or PDE, is a type of propulsion system that is designed primarily to be used in high-speed, high-altitude enviornments.
		The basic operation of the PDE is similar to that of the pulse jet engine; air is mixed with fuel to create a flammable mixture that is then ignited.
		Key difficulties in pulse detonation engines are achieving DDT without requiring a tube long enough to make it impractical and drag-imposing on the aircraft; reducing the noise (often described as sounding like a jackhammer); and damping the severe vibration caused by the operation of the engine.
	www.bookrags.com /Pulse_detonation_engine (974 words)

	Pulse detonation engine and valve invention
		Once a detonation wave 35 is formed, the high temperature and high-pressure combustion gas generated by combustion generates a large thrust at the closed end 32.
		When the detonation wave 35 reaches the open end 33 and the exhaust process commences, combustion gas is exhausted until the pressure of the open end 33 is equal with the external air pressure.
		[0006] Previously proposed pulse detonation engines provide an opening and closing valve in the combustor inlet for supply and control of the gaseous mixture to permit the cycle of filling with the gaseous mixture, its combustion and exhaust, however the outlet of the combustor communicates directly with the nozzle and is always open to atmosphere.
	www.freshpatents.com /Pulse-detonation-engine-and-valve-dt20050825ptan20050183413.php (1098 words)

	EDL
		A pulse detonation engine is an unsteady propulsive device in which the combustion chamber is periodically filled with a reactive gas mixture, a detonation is initiated, the detonation propagates through the chamber, and the product gases are exhausted.
		Shock and detonation polar analysis was used in the vicinity of the triple point to determine that the keystones are bounded by the reaction zones behind the incident wave and Mach stem and by the shear layer.
		The problem of a self-sustaining detonation wave diffracting from a tube into an unconfined space through an abrupt area change is characterized by the geometric scale imposed by the tube and the reaction scale of the detonation.
	www.galcit.caltech.edu /EDL/projects/pde/pde.html (1712 words)

	pulse detonation engine
		A rocket engine that works somewhat like an automobile engine, by injecting fuel and oxidizer into long cylinders and igniting the mixture with a spark plug.
		Pulse detonation technology is one of the approaches to future low-cost launch vehicles being investigated at Marshall Space Flight Center which could lead to lightweight, low-cost rocket engines.
		The pulse-jet and the nuclear pulse rocket operate using the same principle of repeated controlled explosions.
	www.daviddarling.info /encyclopedia/P/pulse_detonation_engine.html (144 words)

	Pulse Detonation Engine
		The engine is often tied to classified aircraft, particular the mysterious Aurora Project.
		The engine was on review at the air show, displayed by the Air Force Research Laboratory (AFRL) from Wright-Patterson Air Force Base in Ohio.
		The engine on display -- built from mostly off-the-shelf automotive parts -- was touted as a test bed for future engines that will be capable of powering aircraft to speeds of up to Mach 4.
	www.space.com /imageoftheday/image_of_day_030804.html (209 words)

	Laser High-Cycle Thermal Fatigue of Pulse Detonation Engine Combustor Materials Tested
		Pulse laser high-cycle thermal fatigue behavior has been investigated on a flat Haynes 188 alloy specimen, under the test condition of 30-Hz cycle frequency (33-msec pulse period and 10-msec pulse width including a 0.2-msec pulse spike; ref. 4).
		The insert shown is a measured laser pulse waveform from the pulse signal of a 1.5-kW CO laser using an oscilloscope.
		Enhanced laser pulses and a rotating tubular configuration are used to mimic the time-dependent temperature and pressure waves in a pulsed detonation engine.
	www.grc.nasa.gov /WWW/RT2000/5000/5100C-zhu.html (882 words)

	Propulsion module - Patent 6584764
		The wave rotor detonation engine includes the wave rotor detonation engine inlet plate 34 having the pair of inlet ports formed therein and disposed in flow communication with a pair of inlet sectors 41.
		A rear wave rotor detonation engine exit plate 37 has a pair of exhaust ports formed therein that are in flow communication with a pair of outlet sectors 40.
		Disposed between and rotatable relative to the wave rotor detonation engine endplates 34 and 37 is the rotor 35a which includes a plurality of wave rotor channels 35.
	www.freepatentsonline.com /6584764.html (3708 words)

	Technology - Computing & Decisioning Systems - Pulse Detonation Propulsion
		Since the first jet engines were invented more than 60 years ago, we've pushed the technology to drastically increase thrust, decrease emissions and increase efficiencies, but the fundamental designs haven't undergone radical changes.
		While pulse detonation can be used alone for smaller thrust needs in applications like unmanned aircraft, GE's scientists are targeting a much larger market and are developing hybrid aircraft engines to power commercial aircraft.
		Traditional engines have to use compressors to achieve the high pressure needed for jet engines, but through "pulsed" detonations, GE researchers hope create a hybrid engine with reduced complexity in the "core," which should eliminate some traditional engine components and simplify the engine.
	www.ge.com /research/grc_2_7_1.html (393 words)

	Pulse Jet Engine Troubleshooting Guide
		My larger engines run well with a much smaller ratio of length to diameter -- probably because the total volume of air involved in the pulse is as important as the length of the air-column being moved.
		When running properly, the new air-fuel charge entering through the front of the engine is ignited by a flame-front which travels back up the tailpipe and collides with the fresh fuel in the primary combustion zone of the engine (at a point some 25%-30% from the front of the engine).
		I have run my own engines for periods of up to 20 minutes at a time on a test-stand and, although parts of the engine do glow red hot and valve life may be significantly reduced, they do not melt.
	aardvark.co.nz /pjet/pjet2.htm (2865 words)

	Pulse Detonation Engine
		Detonation however is a far more powerful reaction of the air/fuel mixture and results in such a rapid reaction that the pressure-wave created travels at super-sonic speeds.
		This tube is sometimes referred to as a DDT (Deflagration to Detonation Transition) tube and its job is to force the trigger charge to burn at a rate that creates a supersonic shockwave.
		Unfortunately pulse detonation engines are probably not the sort of thing that is well suited to amateur development.
	www.aardvark.co.nz /pjet/pde.shtml (1247 words)

	Halfbakery: Very High Efficiency Generator
		Use a pulse detonation engine combined with micro-electromechanical turbines to generate large amounts of power in a small space.
		Pulse detonation engines (or PDE's) http://www.aardvark.co.nz/pjet/pde.shtml are extremely powerful and efficient jet-like combustion engines.
		To cause detonation of the fuel, you need to close off the combustion chamber somehow when you ignite the explosion, then open it very quickly to let the exhaust out.
	www.halfbakery.com /idea/Very_20High_20Efficiency_20Generator (643 words)

	[No title]
	( words)

	[No title]
	( words)

	MSN Encarta - Romania
	encarta.msn.com /encyclopedia_761559516/Romania.html (1012 words)

	[No title]
	www.rotravel.com /romania/history/cap1.php (262 words)

	Romania - VisitEurope.com (Site not responding. Last check: 2007-11-06)
	www.visiteurope.com /romania.html (285 words)

	Romania (Site not responding. Last check: 2007-11-06)
	flagspot.net /flags/ro.html (1633 words)

	ICL - Romania - Constitution (Site not responding. Last check: 2007-11-06)
	www.oefre.unibe.ch /law/icl/ro00000_.html (10035 words)

	Government of Romania (Site not responding. Last check: 2007-11-06)
	www.gov.ro /engleza (2233 words)

	Southeastern Europe Country Analysis Brief
	www.eia.doe.gov /emeu/cabs/romania.html (2575 words)

	Amnesty International Report 2002 - Europe - ROMANIA
	web.amnesty.org /web/ar2002.nsf/eur/romania!Open (1613 words)

	Romania
	travel.state.gov /travel/romania.html (2499 words)

	Rome and Romania, Roman Emperors, Byzantine Emperors, etc.
	www.friesian.com /romania.htm (14386 words)

	Romania
	www.infoplease.com /ipa/A0107905.html (1082 words)

	ROMANIA - Official Travel and Tourism Information. History
	www.romaniatourism.com /history.html (1110 words)

	Romania
	www.factmonster.com /ipka/A0107905.html (875 words)

	BBC NEWS \| World \| Europe \| Country profiles \| Country profile: Romania
	news.bbc.co.uk /1/hi/world/europe/country_profiles/1057466.stm (887 words)

	ICL - Romania Index (Site not responding. Last check: 2007-11-06)
	www.oefre.unibe.ch /law/icl/ro__indx.html (672 words)

	Romania News
	www.topix.net /world/romania (1122 words)

	Romania Travel Information \| Lonely Planet Destination Guide
	www.lonelyplanet.com /worldguide/destinations/europe/romania (190 words)

	Romania - In Your Pocket (Site not responding. Last check: 2007-11-06)
	www.inyourpocket.com /Romania/index.shtml (354 words)

	CIA - The World Factbook -- Romania (Site not responding. Last check: 2007-11-06)
	www.cia.gov /cia/publications/factbook/geos/ro.html (1432 words)

	Romania Maps - Perry-Castañeda Map Collection - UT Library Online
	www.lib.utexas.edu /maps/romania.html (149 words)

Try your search on: Qwika (all wikis)