Results 61 to 70 of about 330,322 (206)

Recent progress in high pressure metrology in Europe

open access: yesEPJ Web of Conferences, 2014
Five European national metrology institutes in collaboration with a university, a research institute and five industrial companies are working on a joint research project within a framework of the European Metrology Research Programme aimed at ...
Sabuga Wladimir   +2 more
doaj   +1 more source

Pressure Induced Changes in the Antiferromagnetic Superconductor YbPd2Sn [PDF]

open access: yes, 2006
Low temperature ac magnetic susceptibility measurements of the coexistent antiferromagnetic superconductor YbPd2Sn have been made in hydrostatic pressures < 74 kbar in moissanite anvil cells. The superconducting transition temperature is forced to T(SC) =
Alireza, P. L.   +6 more
core   +1 more source

Determination of Optimum Compression Ratio: A Tribological Aspect [PDF]

open access: yes, 2013
Internal combustion engines are the primary energy conversion machines both in industry and transportation. Modern technologies are being implemented to engines to fulfill today's low fuel consumption demand. Friction energy consumed by the rubbing parts
H. Kaleli, L. Yüksek, O. Özener
core  

Large-Eddy Simulation and experimental study of cycle-to-cycle variations of stable and unstable operating points in a spark ignition engine [PDF]

open access: yes, 2012
This article presents a comparison between experiments and Large-Eddy Simulation (LES) of a spark ignition engine on two operating points: a stable one characterized by low cycle-to-cycle variations (CCV) and an unstable one with high CCV.
Dugué, Vincent   +5 more
core   +3 more sources

Оценка эффективности работы ЦНД турбины Т-250/300-23,5 Харьковской ТЭЦ-5 [PDF]

open access: yes, 2009
It was proposed to carry out an estimation of the steam turbines flow paths efficiency for the low pressure cylinder in general and particularly for the low pressure cylinder of the T-250/300-23,5 steam turbine taking into account inherent operation ...
Зайцев, М. В.   +3 more
core  

Effective Bulk Modulus in Low-Pressure Pump-Controlled Hydraulic Cylinders

open access: yesActuators
In this paper, the effective bulk modulus of pump-controlled hydraulic cylinders is studied in the context of linear time-invariant modeling and control. Using an experimental test-rig, the minimum expected value of the effective bulk modulus is identified, and its impact on stability and achievable performance under feedback control is analyzed.
Petter Gøytil   +2 more
openaire   +1 more source

DEPENDENCE OF AIR SPRING PARAMETERS ON THROTTLE RESISTANCE

open access: yesNauka ta progres transportu, 2016
Purpose. In this paper it is necessary to conduct: 1) research and analyse the influence of throttle element pneumatic resistance on elastic and damping parameters of air spring; 2) to obtain the dependence of air spring parameters on throttle element ...
O. H. Reidemeister, A. V. Kivisheva
doaj   +1 more source

A coupled finite-volume CFD solver for two-dimensional elasto-hydrodynamic lubrication problems with particular application to rolling element bearings [PDF]

open access: yes, 2016
This paper describes a new computational fluid dynamics methodology for modelling elastohydrodynamic contacts. A finite-volume technique is implemented in the ‘OpenFOAM’ package to solve the Navier-Stokes equations and resolve all gradients in a ...
Dini, D   +3 more
core   +1 more source

Low-frequency and low-amplitude unsteady pressure measurement using polymer-type pressure sensitive paint

open access: yesNihon Kikai Gakkai ronbunshu, 2015
Pressure sensitive paint (PSP) using poly(TMSP) as a polymer binder has high pressure sensitivity for low gauge pressure conditions observed in low-speed flows, which is important for research and development in mechanical engineering fields.
Hideo MORI   +5 more
doaj   +1 more source

Some field experience with subsynchronous vibration of centrifugal compressors [PDF]

open access: yes
A lot of large chemical fertilizer plants producing 1000 ton NH3/day and 1700 ton urea/day were constructed in the 1970's in China. During operation, subsynchronous vibration takes place occasionally in some of the large turbine-compressor sets and has ...
Du, Yun-Tian   +5 more
core   +1 more source

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