Results 261 to 270 of about 271,691 (311)
Desorption funnel model based on composite pressure drop propagation in gas production stage of coalbed methane. [PDF]
Sci RepZhang P +7 more
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Proceedings of SPE Production Operations Symposium, 1985
ABSTRACT The Pressure Fluctuating Tool (PFT) utilizes a fluidic oscillator to create pulsating pressure for breaking down perforations. The maximum pressure fluctuations produced by the oscillator can be as great as 1500 psi (10,300 kPa) above and below downhole ambient pressure with frequency ranging from 140 to 160 cycles per second ...
R. A. Payne +3 more
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ABSTRACT The Pressure Fluctuating Tool (PFT) utilizes a fluidic oscillator to create pulsating pressure for breaking down perforations. The maximum pressure fluctuations produced by the oscillator can be as great as 1500 psi (10,300 kPa) above and below downhole ambient pressure with frequency ranging from 140 to 160 cycles per second ...
R. A. Payne +3 more
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Pressure Sensitive Paint for Acoustic Pressure Fluctuations
Noise Control and Acoustics, 2005Full-field luminescent pressure sensors are commonly referred to as Pressure Sensitive Paint (PSP). In this paper, the suitability of PSP for the detection of acoustic pressure fluctuations is evaluated. Single point measurements utilizing a photomultiplier tube are performed in an acoustic plane wave tube capable of generating pressure levels up to ...
Schanze, Kirk S. +4 more
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Damping of intraocular pressure fluctuations
Clinical & Experimental Ophthalmology, 2012AbstractBackground: There is increasing evidence that relatively rapid spikes in intraocular pressure may contribute to axonal damage in glaucoma. The present study seeks to quantify the ability of a compressible damping element (a simple air bubble) to reduce intraocular pressure fluctuations induced by a known change in intraocular fluid volume ...
Stephen J, Cringle, Dao-Yi, Yu
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Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 1996
This paper reintroduces an alternative plasticity index where σm is the r.m.s. profile slope.
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This paper reintroduces an alternative plasticity index where σm is the r.m.s. profile slope.
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Pressure fluctuations on gates
Journal of Hydraulic Research, 1989Mean and fluctuating pressures on various geometries of vertical-lift gates have been measured and analysed. The influence of various hydraulic parameters and the magnitude of the gate opening on mean and r.m.s. pressure fluctuations and their spatial correlations has been investigated.
BHARGAVA, VP, NARASIMHAN, S
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Physica, 1973
Abstract The old problem of pressure fluctuations is analyzed in terms of three characteristic times: (1) the duration of a molecular collision with the wall, (2) the time between successive collisions by a specific molecule, and (3) the integrating time of the pressure-measuring instrument.
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Abstract The old problem of pressure fluctuations is analyzed in terms of three characteristic times: (1) the duration of a molecular collision with the wall, (2) the time between successive collisions by a specific molecule, and (3) the integrating time of the pressure-measuring instrument.
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The Journal of the Acoustical Society of America, 1961
The intense vibration accompanying the extension of dive brakes and other high-drag devices on aircraft and missiles has been observed for many years. Recently, considerable vibration has been experienced at the fundamental longitudinal mode and at other internal resonance frequencies of a vehicle which had a blunt base during the maximum dynamic ...
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The intense vibration accompanying the extension of dive brakes and other high-drag devices on aircraft and missiles has been observed for many years. Recently, considerable vibration has been experienced at the fundamental longitudinal mode and at other internal resonance frequencies of a vehicle which had a blunt base during the maximum dynamic ...
openaire +1 more source