Results 181 to 190 of about 5,519 (211)

Cryogenic foil bearing turbopumps

32nd Aerospace Sciences Meeting and Exhibit, 1994
Cryogenic foil bearing turbopumps offer high reliability and low cost. The fundamental cryogenic foil bearing technology has been validated in both liquid hydrogen and liquid oxygen. High load capacity, excellent rotor dynamics, and negligible bearing wear after over 100 starts and stops, and over many hours of testing, were observed in both fluids. An
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Turbopumps, a Historical Perspective

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006
A turbopump (abbreviated as TP) is a high precision, high speed, relatively complex piece of rotary machinery, where a turbine drives one or two liquid propellant pumps. It is a key component in many major liquid propellant rocket engine (LPREs) and its function is to raise the pressure of liquid propellants, taken from the tanks in a flight vehicle ...
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Liquid hydrogen foil-bearing turbopump

29th Joint Propulsion Conference and Exhibit, 1993
The testing and performance evaluation of a liquid hydrogen turbopump with the rotor supported by foil bearings is discussed. The objectives of the program were to demonstrate the long-life feature of a foil-bearing turbopump and to evaluate its operational characteristics. The demonstration has successfully shown the reliability, long life, and robust
RICHARD GILBRECH, ALSTON GU, TOM RIGNEY, MARSHALL SAVILLE, MIKE ROSSONI   +4 more
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TURBOPUMP

2004
The invention relates to a turbovacuum pump for producing a high vacuum. Said turbovacuum pump comprises a rotor shaft (15) which rotates at high speed and is mounted between two rolling bearings (21,21a). The outer ring (34) of a rolling bearing is prestressed in the axial direction by means of a magnet arrangement consisting of two annular magnets ...
LEYBOLD VAKUUM GMBH, BEYER CHRISTIAN, ENGLAENDER HEINRICH   +2 more
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Turbopump Turbines Developed by Volvo

40th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2004
This paper describes the design and development process for the Rocket Turbopump turbines, which has been developed by Volvo. Volvo has designed Vulcain, Vulcain 2 and Vinci turbines for hydrogen and oxygen turbopump, and is in the midst of testing the newly developed turbines for Vinci turbopumps.
Stefan Trollheden, Bjorn Bergenlid, Ulf Palmnas, S. Brodin   +3 more
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Liquid hydrogen turbopump foil bearing

27th Joint Propulsion Conference, 1991
Space transfer vehicles and other power and propulsion systems require long-life turbopumps. Rolling element bearings used in current turbopumps do not have sufficient life for these applications. Process fluid foil bearings have established long life, with exceptional reliability, over a wide range of temperatures and fluids in many high-speed ...
M. SAVILLE, A. GU, R. CAPALDI
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Turbopumps for Liquid Rocket Engines

SAE Technical Paper Series, 1992
<div class="htmlview paragraph">This technical paper discusses the evolution of turbopumps designed for U.S. rocket engines, starting with the Thor, Jupiter, and Atlas missiles, which were developed in the 1950s; the F-1 and J-2 engines, which were developed in the 1960s for the Saturn V vehicle to put man on the moon; and the Space Shuttle Main ...
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Rotordynamics of Turbopumps and Hydroturbines

2017
Rotordynamic forces on pump impellers and turbine runners are reviewed. First, it is shown that the rotordynamic instability occurs when the tangential component of the effective rotordynamic force is in the direction of rotor whirl. In many cases of centrifugal impellers, rotordynamic forces can cause forward whirl at supercritical speeds where the ...
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Turbopump Corporation

SSRN Electronic Journal, 2017
William Sihler, Kevin J. Ramundo
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Computation of turbopump transients

2020
ABSTRACT COMPUTATION OF TURBOPUMF TRANSIENTS BASSAM ADRA M.Sc in civil engineering Supervisor : Prof. Dr. SUha SEVÜK JUNE 1988, 91 pages Hydraulic transients caused by sudden power failure are usually severe and their analysis is of particular interest to designers In this study a general purpose computer program FORTRAN language is developed for the ...
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