Results 121 to 130 of about 2,859,954 (336)
A cyclic ground test of an ion auxiliary propulsion system: Description and operational considerations [PDF]
The Ion Auxiliary Propulsion System (IAPS) experiment is designed for launch on an Air Force Space Test Program satellite (NASA-TM-78859; AIAA Paper No. 78-647).
Kramer, Edward H., Ling, Jerri S.
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Influence of an Oxygen‐Free Atmosphere on Diamond‐Single‐Grain Scratching of Ti–6Al–4V
Advanced Engineering Materials, EarlyView.Single‐grain scratching of Ti–6Al–4V is investigated under controlled, oxygen‐free, and ambient atmospheres using a novel experimental setup with in situ high‐speed imaging. The approach enables direct observation of chip formation and adhesion under suppressed oxidation.
Berend Denkena +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold +2 more
wiley +1 more source
INVESTIGATION OF HEAT UTILIZATION EFFICIENCY IN SUCTION AND EXHAUST VENTILATION SYSTEMS
Известия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2014 The paper considers a possibility to use a thermal pump and heat-exchange device in the ventilation system for heat utilization of exhaust air. An influence of air characteristics on energy efficiency of heat-utilizing installations has been ...
A. N. Kuzovlev, V. V. Moroz
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Frequency response of an axial-flow compressor exposed to inlet pressure perturbations [PDF]
Experimental results of a series of engine tests designed to obtain the stage dynamics of an eight-stage axial-flow compressor over the frequency range of 0.5 to 200 hertz are presented.
Milner, E. J. +2 more
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RGB generation by four-wave mixing in small-core holey fibers
, 2007 We report the generation of white light comprising red, green, and blue spectral bands from a frequency-doubled fiber laser by an efficient four-wave mixing process in submicron-sized cores of microstructured holey fibers.
Horak, P. +7 more
core +1 more source
Advanced Engineering Materials, EarlyView.Low‐consumable nickel ferrite‐based anodes for the Hall–Héroult process are compared with conventional prebaked carbon anodes using thermodynamic simulation and prospective life cycle assessment under contrasting future electricity system pathways from 2025 to 2050.
Felipe Alejandro Garcia Paz +6 more
wiley +1 more source
Wind tunnel tests of the dynamic characteristics of the fluidic rudder [PDF]
The fourth phase is given of a continuing program to develop the means to stabilize and control aircraft without moving parts or a separate source of power.
Belsterling, C. A.
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Interaction of Ladle Slag With Varying SiO2 Content and Recyclate‐Based MgO–C Refractories
Advanced Engineering Materials, EarlyView.Ladle slags (CaO/Al2O3 = 1) with 1–20 wt% SiO2 were investigated in contact with industrial MgO–C refractories fabricated from fresh magnesia and 50 wt% recyclate. The sessile drop method at 1600°C reveals intensive gas formation, delayed slag infiltration in recyclate‐based samples, and, under high‐SiO2 slag, formation of a dense MgAl2O4‐rich ...
Anton Yehorov +6 more
wiley +1 more source
Advanced flight control system study [PDF]
A fly by wire flight control system architecture designed for high reliability includes spare sensor and computer elements to permit safe dispatch with failed elements, thereby reducing unscheduled maintenance. A methodology capable of demonstrating that
Hartmann, G. L. +5 more
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