Results 51 to 60 of about 28,663 (219)
Polymer Engineering &Science, EarlyView.Schematic of the in‐line rheometry setup and the evaluation of three distinct modeling frameworks (semiempirical, viscoelastic, and EOS) to predict viscosity reduction in diluted polyethylene melts via time‐concentration superposition (Illustration generated via ChatGPT).
Ernst Georg Viehböck +5 more
wiley +1 more source
Performance of gas-lubricated cruciform-mounted tilting-pad journal bearings and a damped flexibly mounted spiral-groove thrust bearing [PDF]
A test program was conducted to determine the performance characteristics of gas-lubricated cruciform-mounted tilting-pad journal bearings and a damped spiral-groove thrust bearing designed for the Brayton cycle rotating unit (BRU).
Ream, L. W.
core +2 more sources
Permafrost and Periglacial Processes, EarlyView.ABSTRACT The amount and stratigraphic setting of ground ice in permafrost slopes is a key control on the style and magnitude of permafrost mass wasting. Understanding the spatial and stratigraphic variations in ground ice distribution on permafrost slopes is therefore a fundamental property in assessing the stability of permafrost hillslopes.
Joseph M. Young +2 more
wiley +1 more source
steel research international, EarlyView.This study uses in situ synchrotron X‐ray diffraction at the German Electron Synchrotron to analyze low‐pressure carburizing (LPC) in steels. The findings reveal surface carbon saturation and carbide formation kinetics, and phase‐specific stress development during quenching. The results show carbide kinetics depend on steel grade and size, while stress
Ogün Baris Tapar +6 more
wiley +1 more source
Orbital transfer vehicle oxygen turbopump technology. Volume 2: Nitrogen and ambient oxygen testing [PDF]
The testing of a rocket engine oxygen turbopump using high pressure ambient temperature nitrogen and oxygen as the turbine drive gas in separate test series is discussed. The pumped fluid was liquid nitrogen or liquid oxygen.
Brannam, R. J. +4 more
core +1 more source
Safety Science and Technology, EarlyView.Schematic diagram of a triaxial fluid–solid coupling device based on the mapping function. ABSTRACT In deep coal mining, the influence of temperature–pressure coupling on the mechanical properties of coal is a crucial factor inducing dynamic disasters.
Musen Gao, Heng Ma, Xiaoqi Wang, Ke Gao
wiley +1 more source
Magnetic bearings for free-piston Stirling engines [PDF]
The feasibility and efficacy of applying magnetic bearings to free-piston Stirling-cycle power conversion machinery currently being developed for long-term space missions are assessed.
Curwen, P. W. +3 more
core +1 more source
Why have hydrostatic bearings been avoided as a stabilizing element for rotating machines [PDF]
The advantages are discussed of hydrostatic, high pressure bearings as providers of higher margin of stability to the rotor/bearing systems. It is apparent that deliberate use of hydrostatic bearing high pressure lubricated (any gas or liquid) can easily
Bently, D. E., Muszynska, A.
core +1 more source
Boreas, EarlyView.Understanding the course and dynamics of ancient river systems, such as the pre‐Odra, provides valuable insights into the post‐glacial evolution of landscapes and riverine processes. The northwest‐trending pre‐Odra was an important drainage system of the European mainland into the Baltic Basin during and after the Scandinavian Ice Sheet retreat ...
Maryse C. Schmidt +4 more
wiley +1 more source
Effects of vibration and shock on the performance of gas-bearing space-power Brayton cycle turbomachinery. Part 4: Suppression of rotor-bearing system vibrations through flexible bearing support damping [PDF]
A bearing damper, operating on the support flexure of a pivoted pad in a tilting-pad type gas-lubricated journal bearing, has been designed, built, and tested under externally-applied random vibrations. The NASA Brayton Rotating Unit (BRU), a 36,000 rpm,
Badgley, R. H. +2 more
core +1 more source