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Topic: Turbopump

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	Turbopump system for driving a plurality of pumps - Patent 5176508
		The turbopump system of claim 1 wherein the first and second rotor blades are oriented such that the inner turbine and first pump impeller rotate at a higher speed than the outer turbine rotor and second pump impeller.
		The turbopump system according to the present invention obviates the drawbacks of the known systems by providing a counter-rotating turbine having concentrically arranged turbine rotors, each of which are directly attached to a pump impeller.
		The turbopump system 1 comprises two coaxial centrifugal pumps 2a and 2b which may be driven at different speeds by a counter-rotating turbine 3 whose axis of rotation is coaxial with that of pumps 2a and 2b.
	www.freepatentsonline.com /5176508.html (3287 words)

	PWR Engineering - Threshold Journal: Turbopumps for Liquid Rocket Engines
		The liquid rocket engine turbopump is a unique piece of rotating machinery in comparison to turbo-jets, turbo-fans and turbo-props, since it is typically pumping cryogenic liquids while being driven by high temperature gases, posing large temperature differentials between the pump and turbine.
		Various turbopump configurations will be discussed at a conceptual design level, utilizing the disciplines involved in the design selection process, the "state of the art" of rotating machinery when each design took place, and the engine cycle requirements that influence the turbopump design.
		With the engine requirements established, the turbopump configuration is selected based on optimizing the pumps for each propellant, the turbine for the drive gas available energy, and the mechanical design arrangement for life, weight and producibility considerations.
	www.rocketdynetech.com /articles/turbopump.htm (4205 words)

	Turbopump - Information from Reference.com
		Using turbopumps in rockets was a breakthrough; the power of the rocket motors was increased by an order of magnitude, making the lifting of heavy loads practical.
		Most turbopumps are centrifugal - the fluid enters the pump near the axis and the rotor accelerates the fluid circumferentially and compresses it against the rim, generating high pressures (hundreds of bar is not uncommon), and if the outlet backpressure is not too high, high flow rates.
		Turbopumps in rockets are important and problematic enough that launch vehicles using one have been caustically described as a 'turbopump with a rocket attached'- up to 50% of the total cost has been ascribed to this area.
	www.reference.com /search?q=Turbopump (1079 words)

	Research Horizons
		Turbopump cavitation has been identified as a source of several recent anomalous flight and ground-test vibration signatures in both booster and upper-stage engines and, more critically, as the cause of the 1999 flight failure of a Japanese H-II rocket.
		Both dedicated component test facilities and high-fidelity turbopump cavitation models are needed to improve the understanding of cavitation physics.
		Current turbopump design and performance prediction practices often employ such models; however, a dearth of high-quality validation data for cavitating rocket turbopumps has left these models insufficiently validated, resulting in reduced confidence in predictive capability.
	www.aero.org /publications/crosslink/fall2006/irnd.html (1334 words)

	NASA, Air Force Achieve Key Milestones On Next-Generation Engine
		The liquid-hydrogen fuel turbopump was developed for NASA and the Air Force by the Rocketdyne Propulsion and Power division of the Boeing Company of Canoga Park, Calif. The turbopump test series, conducted at the Stennis Space Center, was completed Oct. 29.
		The turbopump is designed to provide high-pressure hydrogen to the rocket engine thrust chamber, enabling the combustion process and generating thrust.
		The turbopump extracts energy from hot gases, which are generated by the fuel preburner and flow through the turbine, causing the turbopump rotor to spin at more than 50,000 rpm.
	www.spacedaily.com /news/rocketscience-03zzl.html (925 words)

	Flometrics - Rocket Pump
		Turbopumps take a long time to develop because they require as hard to develop as a jet engine, but they only run for minutes between overhauls.
		Also each turbopump must be tuned to a particular rocket thrust chamber, and rocket testing is dangerous and expensive.
		This pump has the advantage over standard turbopumps in that the weight is about the same, the unit, engineering and test costs are less and the chance for catastrophic failure is negligible.
	www.flometrics.com /rockets/rocket_pump/rocketpump.htm (1595 words)

	Turbopump system Section (Site not responding. Last check: )
		Therefore, in the research for reliability improvement of the LE-7A turbopump, we had actively supported former NASDA in a LE-7A liquid oxygen turbopump technical test using a high pressure liquid oxygen turbopump test facility or a LE-5B liquid oxygen turbopump technical test for the second engine of H-IIA Rocket.
		Since a rocket turbopump sucks dangerous cryogenic liquid in at low pressure and sends it to the combustor rotating at high speed to be highly pressurized, it needs to be equipped with high performance bearings, seals and impellers.
		The purpose of this study is to improve the suction performance of the inducer on a large scale to simplify the pressurization system and reduce the weight of the propellant tank.
	www.iat.jaxa.jp /kspc/english/research/turbo.htm (466 words)

	Turbopumps for Liquid Rocket Engines
		The liquid rocket engine turbopump is a unique piece of rotating machinery in comparison to turbo-jets, turbo-fans and turbo-props, since it is typically pumping cryogenic liquids while being driven by high temperature gases, posing large temperature differentials between the pump and turbine.
		Various turbopump configurations will be discussed at a conceptual design level, utilizing the disciplines involved in the design selection process, the "state of the art" of rotating machinery when each design took place, and the engine cycle requirements that influence the turbopump design.
		Maximum turbopump efficiencies and maximum turbine temperatures minimiz e the required turbine inlet pressure and pump discharge pressures and, therefore, minimize the turbopump weight.
	www.k-makris.gr /RocketTechnology/TurboPumps/turbopumps_for_liquid_rocket_eng.htm (4162 words)

	J-2 Engine
		The oxidizer turbopump is mounted on the thrust chamber diametrically opposite the fuel turbopump.
		The turbines of the oxidizer and fuel turbopumps are connected in series by exhaust ducting that directs the discharged exhaust gas from the fuel turbopump turbine to the inlet of the oxidizer turbopump turbine manifold.
		It is mounted between the oxidizer high-pressure duct from the oxidizer turbopump and the oxidizer inlet on the thrust chamber assembly.
	www.apollosaturn.com /sibnews/sec6.htm (2803 words)

	NationMaster - Encyclopedia: Turbopump
		The fuel turbopump, mounted on the thrust chamber, is a turbine-driven, axial flow pumping unit consisting of an inducer, a seven-stage rotor, and a stator assembly.
		The oxidizer turbopump is mounted on the thrust chamber diametrically opposite the fuel turbopump.
		It is mounted between the oxidizer high-pressure duct from the oxidizer turbopump and the oxidizer inlet on the thrust chamber assembly.
	www.nationmaster.com /encyclopedia/Turbopump (994 words)

	Turbopump
		A turbopump is a type of pump in which the fluid is moved by the blades of a high-speed turbine.
		Turbopumps are used with rocket engines to provide pressure for the fuel and oxidizer[?] to be injected into the combustion chamber[?].
		A turbopump is used when it is infeasable to use a pressure-fed engine, which requires much stronger tanks to hold the fuel and oxidizer.
	www.ebroadcast.com.au /lookup/encyclopedia/tu/Turbopump.html (172 words)

	TFAWS Thermal and Fluids Analysis Workshop
		One of the primary hurdles is the needed synthesis of information (geometry, internal and external flow conditions, etc.) that is required to completely analyze the 2D and 3D effects of the various thermal conditions at the component and assembly level.
		In the discussed turbopump optimization case, the optimization plan utilizes a hierarchical set of optimization loops to characterize the effects of the independent design parameters on dependent hydrodynamic and structural results.
		The relative flow angle experienced by a turbopump, located immediately downstream of the elbow, may vary by 2 deg or more for a hypothetical wheel speed of ~20000 rpm and duct diameter of ~8 inches.
	www.odu.edu /misc/tfaws/propulsion_paper_session.shtml (2103 words)

	Metalex TurboPump - Full Story
		Compared to present manufacturing techniques, the use of multi-axis CNC machining on the P&W alternate fuel turbopump shrouded impellers has greatly improved both manufacturability and quality of the part.
		The second impeller is a titanium part with six sets of blades, one long, medium and short blade per set, equally spaced around a hub, and covered on both sides with a shroud.
		The impeller functions in series with two other impellers to increase the pressure of the liquid hydrogen flowing through the turbopump.
	www.radical-departures.net /2001/metalex_turbopump_full.asp (943 words)

	Barber-Nichols: Products : Rocket Engine Turbopumps
		The engine produces 60,000 pounds of thrust and the turbopump utilizes two counter rotating assemblies mounted in a single housing.
		The Bantam Turbopump and the Fastrac Turbopump are two examples that demonstrate the cutting-edge turbopump expertise available at Barber-Nichols.
		The Merlin Engine produces more than 100,000 pounds of thrust at sea level and the turbopump is the lightest in its thrust class.
	www.barber-nichols.com /products/rocket_engine_turbopumps (397 words)

	Pratt & Whitney Delivers First Overhauled Space Shuttle Oxidizer Turbopump \| SpaceRef - Your Space Reference
		Three pairs of high-pressure turbopumps (three hydrogen fuel turbopumps and three liquid oxidizer turbopumps) serve as key components of the upgraded Block II SSMEs on each of the orbiters.
		The turbopumps operate in extreme temperatures that range from minus 420 degrees to 1,400 degrees Fahrenheit.
		PandW's turbopumps were derived from the company's extensive experience in gas turbine engine development and feature fewer welds, a stronger integral shaft/disk and more robust bearings than their predecessors.
	www.spaceref.com /news/viewpr.html?pid=12403 (913 words)

	Boeing: Boeing Tests Critical Components for Advanced Rocket Engine
		The test, one of nine planned, followed a related series of hot-fire tests in which a Boeing Rocketdyne-built pre-burner that provides oxygen-rich gasses to the oxidizer turbopump turbine drive went "six for six" in the series.
		The Rocketdyne pre-burner was subsequently attached to the new oxidizer turbopump for testing.
		Upon completion of the hot-fire test series, the oxidizer turbopump will become part of the IPD engine system and help to provide advancement of key technologies that could find application in future Air Force rocket applications or NASA's Next Generation Launch Technology program.
	www.boeing.com /news/releases/2003/q2/nr_030515n.html (583 words)

	Atlantis Crew to Test Fly New, Safer Shuttle Main Engine
		That engine included, among other things, Pratt and Whitney's new high-pressure liquid oxygen turbopump, a pump that took full advantage of advances in materials science and manufacturing techniques.
		In 1998, changes to the main engines that eased the operating pressures and reduced the number of inspections between flights were introduced to the shuttle fleet.
		Speaking as a former shuttle commander, McMonagle said that once all three engines are equipped with the new fuel turbopumps -- the first such mission is Discovery's STS-108 mission targeted to launch on Nov. 29 -- the astronauts shouldn't notice any difference during their climb to orbit.
	www.space.com /missionlaunches/missions/sts104_pump_010710-2.html (521 words)

	Building A Better Rocket Engine
		This gushing torrent of fuel is driven by a turbopump.
		To power the turbopump, a small amount of fuel is "preburned", thus generating hot gases that drive the turbopump, which in turn pumps the rest of the fuel into the main combustion chamber.
		This "full-flow staged cycle" design has an important advantage: with more mass passing through the turbine that drives the turbopump, the turbopump is driven harder, thus reaching higher pressures.
	www.spacedaily.com /news/rocketscience-05zzl.html (754 words)

	Test Experience with a High-Pressure Oxygen Turbopump and Heat Exchanger
		Test results of a 97 KW (130 hp) Monel turbopump assembly driven by 300 K (540 R), 27.6 MPa (4000 psi) oxygen at a speed of 62,000 rpm while supported on oxygen-pressurized hydrostatic bearings is presented, along with test results for a 27.6 MPa (4000 psi), 644 K (1159 R) oxygen/hydrogen heat exchanger.
		These new rocket components incorporate design and material selection criteria which have evolved from NASA and ASTM G-4 standards and test methods.
		metal ignition, oxygen turbopump, oxygen heat exchanger, oxygen compatibility, nickel and copper alloys
	www.astm.org /DIGITAL_LIBRARY/STP/PAGES/STP17787S.htm (186 words)

	turbopump development 1947 1949 - OneLook Dictionary Search
		turbopump development 1947 1949 - OneLook Dictionary Search
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	www.onelook.com /?lang=all&w=turbopump+development+1947+1949 (113 words)

	Amazon.com: "turbopump units": Key Phrase page
		Fire at Sea: The Tragedy of the Soviet Submarine Komsomolets by D. Romanov
		See all pages with references to "turbopump units".
		Y., "Experience of Developing Liquid Propulsion Rocket Assembly Feedsystems Using Boost Turbopump Units," AIAA Paper 2003-5072, 2003.
	www.amazon.com /phrase/turbopump-units (218 words)

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