Results 221 to 230 of about 245,653 (257)

The diurnal surface-pressure oscillation

Archiv für Meteorologie, Geophysik und Bioklimatologie Serie A, 1965
A spherical harmonic analysis of the diurnal surface pressure oscillation shows that its main part can be represented by a wave travelling westward with the sun. The amplitude of this wave is about half of that of the semidiurnal oscillation [eq. (7)].
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Pressure Oscillations in Aft-Finocyl SRMs

AIAA Scitech 2019 Forum, 2019
The problem of pressure oscillations, occurring during the quasi-steady state of aft-finocyl solid rocket motors, is investigated by using the Q1D model AGAR (Aerodynamically Generated Acoustic Resonance) developed and validated at DIMA - Dept. of Mechanical and Aerospace Engineering of Sapienza, University of Rome.
Laureti, Mariasole, Favini, Bernardo
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Evaluation of Pressure Oscillator Losses

AIP Conference Proceedings, 2006
Efficiencies of regenerative cryocoolers are influenced by losses within the pressure oscillator (Stirling‐type compressor). An evaluation of these losses is important when searching for ways to improve the overall cryocooler efficiency. Typically, compressor efficiency is taken as the ratio of PV power of the piston(s) to electrical input power.
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Nonlinear Pressure Oscillations in a Combustion Field

ARS Journal, 1960
M practical importance has been attached to the problem of high frequency combustion instability, in particular, the unstable pressure oscillations which may affect the performance of a rocket motor. A thorough mathematical treatment of the linearized aspects of this problem has been given by Crocco and Cheng (1-3). Basing their theory on the sensitive
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Finite pressure effects on sawtooth oscillations

Physics of Fluids B: Plasma Physics, 1991
Nonlinear 3-D simulation of sawtooth oscillations shows that the helically twisted hot spot has a prominent toroidal bulge at the large major radius side, characteristic of a high-εβp instability. This bulge drives other m/n islands just outside the mixing radius resulting in a stochastic annular region. A similar effect is also found in shaped plasmas,
W. Park, D. A. Monticello, E. Fredrickson, K. McGuire   +3 more
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Radiation-pressure enhanced opto-acoustic oscillator

2014 IEEE 27th International Conference on Micro Electro Mechanical Systems (MEMS), 2014
This paper presents a driving scheme for silicon opto-acoustic oscillators (OAO) by simultaneously exploiting radiation-pressure (RP) and RF feedback oscillation mechanisms to achieve significantly lower phase noise than could be realized by either phenomenon solely.
Matthew J. Storey, Siddharth Tallur, Sunil A. Bhave   +2 more
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Grouting of fractures using oscillating pressure

2020
In connection with the storage of spent nuclear fuel in the Swedish crystalline rock a new technology for the grouting of-very narrow — 100 )µm — fractures is being developed., The method is based on bentonite or cement with a low water content as grouting fluid and a very high static pressure — order of 2 MPa — superimposed by a high-frequency ...
Lennart Börgesson, Lennart Jönsson
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SAW Oscillator Pressure Sensors

1975 Ultrasonics Symposium, 1975
T.M. Reeder, D.E. Cullen, M. Gilden
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Oscillation of intracranial pressure and sleep

Clinical Neurology and Neurosurgery, 1986
H, Ueno, K, Shima, H, Chigasaki, S, Ishii   +3 more
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Combustion Under Harmonically Oscillating Pressure

2020
Boris V. Novozhilov, Vasily B. Novozhilov   +1 more
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