Results 251 to 260 of about 37,035 (297)

Pressure pulsations above turbomolecular pumps

Journal of Vacuum Science and Technology, 1982
The effect of increasing the temperature of the cooling water for a Leybold Turbovac 350 is studied. (AIP)
S. Danziger, B. R. F. Kendall, J. Dormer
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Pressure Pulsations in Centrifugal Pumps

Journal of Vibration and Acoustics, 1992
Pressure pulsations in centrifugal pumps are created by the wake flow from the impeller blade trailing edge and by large-scale turbulence and vortices generated by flow separation and flow recirculation at part load. The physical mechanisms causing pressure pulsations and the design parameters having an influence on the level of the pressure pulsations
J. F. Guelich, U. Bolleter
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Pressure Pulsation of Scroll Compressor

Advanced Energy Systems, 1997
Abstract Pressure pulsation in the scroll compressor was analyzed with three dimensional FLIC (flow in cell) method which was a kind of finite volume method. In advance of analyses, the grid generation method for numerical analysis was established in the scroll compression chamber.
Takahide Itoh, Makoto Fujitani
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Relationship between arterial pulsations and intraocular pressure

Experimental Eye Research, 1983
A model of the eye is proposed in order to find a relationship between small changes in volume and the intraocular pressure in terms of the physical parameters of the globe. The results show that pulsations in pressure due to small variations in volume are directly proportional to the average intraocular pressure and inversely proportional to the ...
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Transducers for measuring strong pressure pulsations

Measurement Techniques, 1997
Results are presented from an experimental study of pressure pulsations inside the precumbustion chamber of a model of a combustion engine. The pulsations are studied with the use of thin-film capacitive transducers.
A. A. Kazaryan, P. V. Miodushevskii, A. S. Mirskov   +2 more
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Attenuation of low frequency pressure pulsations

2022
In this thesis, the concept of hydraulic pulsating filter is explored and developed. The filter or resonator is designed to attenuate the pulsation that occurs when the hydraulic pump is discharged. Pumps pulsate over a range of frequencies, depending on pump design, speed, displacement, and other factors.
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Microcirculatory response to periodic pulsations in capillary pressure

Microvascular Research, 1982
Abstract A mathematical analysis of time-dependent convection and diffusion in the microcirculation is presented in order to ascertain the effect on capillary-tissue fluid exchange of cardiac pulsatility and the rhythmic contractions of arterioles and precapillary sphincters.
E P, Salathé, R, Venkataraman, J F, Gross   +2 more
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Research on a new pressure pulsator

Physics of Fluids
Pulsators are widely used to study the dynamic characteristics of liquid flow components. However, it is difficult to adapt the existing actuators to the excitation requirements under high pressures, low temperatures, and toxic media. This study describes the design of a novel pressure pulsation device and presents the results of simulations and ...
Su Yong, Gong Wu-Qi
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Piping Vibration due to Pressure Pulsations: Review

Advanced Materials Research, 2013
Excessive piping vibrations are a major cause of machinery downtime, leaks, fatigue failure, high noise, fires and explosions in refineries and petrochemical plants. In piping system, vibration excitation sources may come from mechanical sources, hydraulics sources or can be the combination of both.
M. Haryzul Ghazali, Lim Meng Hee, M. Salman Leong   +2 more
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Further Pressure Pulsation Reduction in Fuel Rails

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">Fuel rails with integrated damping effect (FRID's), developed for MPI returnless fuel supply system s, effectively reduce fuel pressure pulsations without pulsation dampers (P/D's). One of the remained issues on FRID's is discussed in this paper.
Tetsuo Ogata, Yoshiyuki Serizawa, Hikari Tsuchiya, Koichi Hayashi, Kazuteru Mizuno   +4 more
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