Challenging the LyC–Ly α Relation: Strong Ly α Emitters without LyC Leakage at z ∼ 2.3
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Annalisa Citro↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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DESIGN CRITERIA FOR ZERO-LEAKAGE CONNECTORS FOR LAUNCH VEHICLES, VOLUME 6 - ENVIRONMENTAL EFFECTS
Pressure pulses, shock and vibratory loading on launch vehicle connectors - heat environment, vacuum and radiation effects on connector gaskets
LAUNCH VEHICLE↗
Diaphragm eliminates leakage in cryogenic fluid duct coupling
Duct coupling with nickel steel diaphragm of low thermal expansivity is leakproof when used with cryogenic fluids. The diaphragm, located between the two flanges of the coupling, reduces axial shrinkage at the coupling flanges to a minimum.
Source record↗
Study of propellant valve leakage in a vacuum Phase IV report, 10 Dec. 1965 - 14 Jan. 1966
Propellant evaporative freezing in rocket engine manifolds
FREEZING↗
Reduction of microbial dissemination, germicidal activity of ethylene oxide, reduction of microbial contamination on surfaces, evaluation of leakage of microbial contamination from space suits Quarterly summary report no. 7
Measurement techniques for determining microbial contamination from occupied space suits
CONTAMINATION↗
Orbital tube flaring system produces tubing connectors with zero leakage
An orbital tube flaring system produces tubing connectors with a zero-leak potential needed in high pressure hydraulic and pneumatic systems. The flaring system incorporates a rolling cone and rolling die to closely control flare characteristics.
Williams, J. R.↗
Visco seal design offers zero-leakage and wear-free characteristics
Study provides specific design criteria in sealing applications for continuous duty pumps used in bulk liquid transfer. A basic sealing equation predicts visco seal performance in the turbulent regime.
Ketola, H. N.↗
Spiral-grooved shaft seals substantially reduce leakage and wear
Rotating shaft seals used in space power systems have spiral grooves in one or both of the opposing seal faces. These grooves induce a pumping action which displaces the intervening fluid radially inward toward the shaft and counters the centrifugal forces which tend to displace the fluid outward.
Allen, G. P.↗
Zero Leakage Design for Ducts and Tube Connections for Deep Space Travel. Volume 4 - New Connector Designs and Testing Final Report, 5 Jul. 1963 - 30 Jun. 1967
Omega seal, diffusion bonded, pressure welded, and high temperature separable connector designs and environmental tests
Laniewski, J. P.↗
Zero leakage design for ducts and tube connections for deep space travel. Volume 5 - Tube connector design principles and evaluation Final report, 5 Jul. 1963 - 30 Jun. 1967
Principles of connector testing, design evaluation of commercial connectors, and assessment of design rules for threaded connectors
Bain, J. A.↗
Zero leakage design for ducts and tube connections for deep space travel. Volume 6 - X connector feasibility studies Final report, 5 Jul. 1963 - 30 Jun. 1967
Production design feasibility of half inch X-connector for 4500 psi service
Bain, J. A.↗
Zero Leakage Design for Ducts and Tube Connections for Deep Space Travel. Volume 3 - Guide in Selecting Duct, Tubing and Gasketing Materials for Space Vehicles and Missiles Final Report, 5 Jul. 1963 - 30 Jun. 1967
Guide manual for aiding designers in selection of duct, tubing, and gasketing materials for space vehicles and missiles
George, R. L.↗
Propellant leakage detection systems quarterly progress report, 1 sep. - 30 nov. 1967
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Source record↗
Controlled-leakage sealing of bearings for fluid lubrication in a space vacuum environment
Optimal design of sealed fluid lubrication system for bearings in space vacuum environment
Silversher, H. I.↗
Cosmic ray diffusion and the 'leakage lifetime' approximation - An investigation of its validity by the eigenfunction expansion technique
Cosmic ray particle diffusion investigation using approximation evaluated for validity by eigenfunction expansion technique
Jones, F. C.↗
Zero-leakage valves
Valve action confines polymeric material in a metal groove effecting seal by compressive reaction of the polymer. As cold flow does not occur, sealing material resiliency is preserved over numerous operations.
Salvinski, R. J.↗
High speed, self-acting, face-contact shaft seal has low leakage and very low wear
Design adds gas thrust bearing to face of conventional face seal. Bearing lifts seal's carbon face out of contact after startup and establishes thin gas film between sealing surfaces. Operating pressure and speed capabilities are greater than those of conventional face seals.
Zuk, J.↗
Study to develop improved methods to detect leakage in fluid systems, phase 2
An ultrasonic contact sensor engineering prototype leak detection system was developed and its capabilities under cryogenic operations demonstrated. The results from tests indicate that the transducer performed well on liquid hydrogen plumbing, that flow and valve actuation could be monitored, and that the phase change from gaseous to liquid hydrogen could be detected by the externally mounted transducers. Tests also demonstrate the ability of the system to detect internal leaks past valve seats and to function as a flow meter. Such a system demonstrates that it is not necessary to break into welded systems to locate internal leaks.
Janus, J. C.↗