Help


[permalink] [id link]
+
Page "Turbomolecular pump" ¶ 14
from Wikipedia
Edit
Promote Demote Fragment Fix

Some Related Sentences

turbopump and by
A turbopump can comprise one of two types of pumps: centrifugal pump, where the pumping is done by throwing fluid outward at high speed ; or axial flow pump, where alternating rotating and static blades progressively raise the pressure of a fluid.
*** turbopump drive, 90 % hydrogen peroxide decomposed by catalyst bed to produce steam
This engine's high speed turbopump mechanisms developed by the lab and its industrial partners provided the basis for the Space Shuttle's Main Engines.
The pneumatic system is nowadays often replaced by a computer-controlled turbopump.
The turbopump was first employed by German scientists in WWII.
T-Stoff was used to drive the turbopump in the German V2 rocket ; ammonia-stabilized hydrogen peroxide was decomposed into hot steam and oxygen by adding Z-Stoff ( aqueous solution of various permanganates ).
Bleeding off the turbine exhaust allows for a higher turbopump output by decreasing backpressure and maximizing the pressure drop through the turbine.
Many jet engines, including rocket engines use a turbopump which is a centrifugal pump usually propelled by a gas turbine or in some cases a ram-air device ( particularly in ramjet engines which lack a shaft ).
Engine development was complicated by serious turbopump problems.
The exhaust from the turbopump was fed into the nozzle extension by a large, tapered manifold ; this relatively cool gas formed a film which protected the nozzle extension from the hot ( 5, 800 ° F, 3, 200 ° C ) exhaust gas.
Power for operating the turbopump was provided by a high-speed, two-stage turbine.
Power for operating the oxidizer turbopump was provided by a high-speed, two-stage turbine which was driven by the exhaust gases from the gas generator.
The turbines of the oxidizer and fuel turbopumps were connected in a series by exhaust ducting that directed the discharged exhaust gas from the fuel turbopump turbine to the inlet of the oxidizer turbopump turbine manifold.
The Merlin LOX / RP-1 turbopump was developed and is manufactured by Barber-Nichols.
Roll control was by use of the turbopump exhaust to power RCS jets on the fins.

turbopump and thin
A thin membrane and a valve at the exhaust should be added to protect the turbopump from excessive back pressure ( e. g. after a power failure or leaks in the backing vacuum ).

turbopump and system
combustion chamber to leak into the fuel system through the injector head before full propellant pressure was obtained from the turbopump.
The second NERVA engine, the NERVA XE, was designed to come as close as possible to a complete flight system, even to the point of using a flight-design turbopump.

turbopump and for
The purpose of a turbopump is to produce a high pressure fluid for feeding a combustion chamber or other use.
An axial turbopump designed and built for the M-1 ( rocket engine ) | M-1 rocket engine
The original liquid hydrogen turbopump is similar in size to an automobile engine ( weighing approximately ) and produces 72, 000 hp ( 53. 6 MW ) for a power-to-weight ratio of 153 kW / kg ( 93 hp / lb ).
The mission was again postponed when, during prelaunch external tank loading, a transducer on high-pressure oxidizer turbopump for main engine number three showed readings out of specification.
The valve in its open position depressed the speed of the oxygen pump during start, and in its closed position acted as a calibration device for the turbopump performance balance.
# Close the oxidizer turbine bypass valve ( a portion of the gases for driving the oxidizer turbopump were bypassed during the ignition phase )
Barber-Nichols Inc. applied lessons learned from the RS-88 ( Bantum ) and Fastrac engine programs for their turbopump products.
As was also the case for the V-2, hydrogen peroxide was converted to steam to drive the turbopump that fed fuel and LOX into the engine.
Propellant tanks are pressurized to supply fuel and oxidizer to the engine, eliminating the need for turbopump s.
He developed the RD-214 for the R-12, which consisted of four combustion chambers sharing a common turbopump assembly.
** Though one division of the ECCS does not have high pressure flood ( HPCF ) capacities, there exists a steam-driven, safety-rated reactor core isolation cooling ( RCIC ) turbopump that is high-pressure rated and has extensive battery backup for its instrumentation and control systems, ensuring cooling is maintained even in the event of a full station blackout with failure of all 3 emergency diesel generators, the combustion gas turbine, primary battery backup, and the diesel firewater pumps.

by and Pfeiffer
Pfeiffer became President and CEO of Compaq in 1991, as a result of a boardroom coup led by board chairman Ben Rosen that forced co-founder Rod Canion to resign as President and CEO.
CEO Pfeiffer boldly predicted that the Microsoft / Intel " Wintel " duopoly would be replaced by " Wintelpaq ".
On April 17, 1999, just nine days after Compaq reported first-quarter profit being at half of what analysts had expected, the latest in a string of earnings disappointments, Pfeiffer was forced to resign as CEO in a coup led by board chairman Ben Rosen.
In Episode 4 (" Animals ") of the British sitcom Men Behaving Badly, Series 1, Dermot ( played by Harry Enfield ) says to Gary ( played by Martin Clunes ), " There she was, just standing there, making Michelle Pfeiffer look like Neil Kinnock.
Also in 1983, Kilmer self-published a collection of his own poetry entitled " My Edens After Burns ", that included poems inspired by his time with Pfeiffer.
A new old-school Nazi party was formed in 1964 by school teacher Franz Pfeiffer.
The story is told from the viewpoint of the elder two daughters, Ginny played by Jessica Lange and Rose played by Michelle Pfeiffer, who were sexually abused by their father as teenagers.
* Lamia ( Stardust ), the main antagonist in the 2007 fantasy film Stardust played by Michelle Pfeiffer
The performances of Glenn Close, John Malkovich and Michelle Pfeiffer, the cinematography of Philippe Rousselot, the costume design by James Acheson, and in particular the screenplay by Christopher Hampton, garnered considerable critical acclaim.
" in Germania 27, edited by Franz Pfeiffer, pp. 330 – 339.
The syndrome was described as an infectious process by Nil Filatov in 1887 and independently by Emil Pfeiffer in 1889.
The Pfeiffer House and Carriage House are now preserved as the Hemingway-Pfeiffer Museum and Educational Center, run by Arkansas State University.
* 1988: Married to the Mob, directed by Jonathan Demme and starring Michelle Pfeiffer and Alec Baldwin.
Unlike the previous work by theologian Johann Gottlieb Pfeiffer, Zedler's book did not follow a chronological sequence, but organized the material around themes.
It was written between 1962 and 1963 and first produced in German as Spiel on 14 June 1963 at the Ulmer Theatre in Ulm-Donau, Germany, directed by Deryk Mendel, with Nancy Illig ( W1 ), Sigfrid Pfeiffer ( W2 ) and Gerhard Winter ( M ).
I Am Sam ( stylized i am sam ) is a 2001 American drama film written and directed by Jessie Nelson, and starring Sean Penn as a father with a developmental disability, Dakota Fanning as his inquisitive seven-year-old daughter, and Michelle Pfeiffer as his lawyer.
** John Pfeiffer ( producer ) for RCA / Met-100 Singers-100 Years performed by various artists
Franz Pfeiffer edited Walther v. d. Vogelweide, which comes with an introduction and notes ( 4th edition, by Karl Bartsch, Leipzig, 1873 ).
** Biographical sketch by Karl Bartsch in Franz Pfeiffer, ed., Uhlands Briefwechsel mit Freiherrn von Lassberg ( 1870 )

0.135 seconds.