Results 11 to 20 of about 36,724 (301)

Differences of Flow Patterns and Pressure Pulsations in Four Prototype Pump-Turbines during Runaway Transient Processes

Energies, 2020
Frequent working condition conversions in pumped-storage power stations often induce stability problems, especially when the operating point enters the S-shaped region, during which flow transitions and pressure fluctuations are serious.
Zhiyan Yang, Zirui Liu, Yongguang Cheng, Xiaoxi Zhang, Ke Liu, Linsheng Xia   +5 more
doaj   +3 more sources

Specific features of pressure pulsation control in combustion chambers of land based gas turbine units

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2022
LLC SPC Teplofizika, developing low-emission combustion chambers with premixing of fuel for ground application gas turbine installations, investigates the problems associated with the occurrence of pressure pulsations in the combustion chambers, as well ...
D. V. Skiba, D. A. Maksimov, R. S. Kashapov, T. S. Kharisov   +3 more
doaj   +1 more source

Cerebrospinal Fluid Pressure-Related Features in Chronic Headache: A Prospective Study and Potential Diagnostic Implications

Frontiers in Neurology, 2018
Objective: To identify the pressure-related features of isolated cerebrospinal fluid hypertension (ICH) in order to differentiate headache sufferers with ICH from those with primary headache disorder.Methods: In this prospective study, patients with ...
Francesco Bono, Francesco Bono, Maria Curcio, Laura Rapisarda, Basilio Vescio, Caterina Bombardieri, Domenica Mangialavori, Umberto Aguglia, Aldo Quattrone   +8 more
doaj   +1 more source

Bubble Shape Oscillations and the Onset of Sonoluminescence [PDF]

, 1995
An air bubble trapped in water by an oscillating acoustic field undergoes either radial or nonspherical pulsations depending on the strength of the forcing pressure.
A. I. Eller, A. Prosperetti, A. Prosperetti, A. Prosperetti, B. Barber, B. P. Barber, B. P. Barber, B. P. Barber, B. P. Barber, C. C. Wu, D. F. Gaitan, G. Birkhoff, G. Taylor, H. P. Greenspan, H. W. Strube, L. A. Crum, L. D. Landau, L. Rayleigh, M. Miksis, M. Plesset, M. Plesset, M. Plesset, P. Morse, R. G. Holt, R. Hiller, R. Löfstedt, R. Löfstedt, W. Lauterborn, W. Moss   +28 more
core   +11 more sources

Pressure Pulsation Analysis of Oscillating Water Column Rotor Eccentricity Based on the Pulsation Tracking Network Method [PDF]

Journal of Applied Fluid Mechanics
An oscillating water column (OWC) is typical of axial rotor turbines, which are used to convert ocean wave energy into electrical energy. This device impacts downstream pressure pulsations when its rotor becomes eccentric. This study compared the details
J. Lu, Q. Liu, Z. Lu, R. Tao, F. Jin, D. Zhu, R. Xiao   +6 more
doaj   +1 more source

Generation of small-scale structures in the developed turbulence [PDF]

, 2006
The Navier-Stokes equation for incompressible liquid is considered in the limit of infinitely large Reynolds number. It is assumed that the flow instability leads to generation of steady-state large-scale pulsations.
A. M. Obukhov, A. M. Reynolds, A. N. Kolmogorov, A. Noullez, A. S. Gurvich, A. S. Gurvich, A. S. Il’in, A. S. Monin, A. V. Gurevich, B. L. Sawford, C. Beck, C. Foias, C. M. Menevean, E. A. Kuznetsov, K. P. Zybin, L. D. Landau, M. J. Vishik, P. G. Saffman, T. Gotoh, U. Frisch, V. A. Sirota, V. E. Zakharov, V. I. Belincher, V. I. Klyatskin, V. S. L’vov   +24 more
core   +2 more sources

Effect of the staggered impeller on reducing unsteady pressure pulsations of a centrifugal pump

Energy Science & Engineering, 2022
The emitted noise and vibration induced by the unsteady flow of the centrifugal pump are always focused during its running, which is also associated with the high amplitude pressure pulsations.
Junxian Jiang, Ning Zhang, Xiaokai Liu, Bo Gao, Puyu Cao   +4 more
doaj   +1 more source

Geomagnetic disturbances on ground associated with particle precipitation during SC [PDF]

, 2010
We have examined several cases of magnetosphere compression by solar wind pressure pulses using a set of instruments located in the noon sector of auroral zone. We have found that the increase in riometric absorption (sudden commencement absorption, SCA)
Honary, F., Kozlovsky, A., Safargaleev, V., Turunen, T., Voronin, A.   +4 more
core   +3 more sources

A simple method using strain measurement on pipe outer surface to evaluate pressure pulsations in piping systems

Nihon Kikai Gakkai ronbunshu, 2014
Accurate evaluation of occurrence location and amplitude of pressure pulsations in a piping system can lead to efficient plant maintenance to prevent fatigue failure of piping and components because the pulsations could be main causes of vibration ...
Akira MAEKAWA, Tsuneo TAKAHASHI, Takashi TSUJI, Minoru KATO   +3 more
doaj   +1 more source

The role of turbulent pressure as a coherent pulsational driving mechanism: the case of the delta Scuti star HD 187547 [PDF]

, 2014
HD 187547 was the first candidate that led to the suggestion that solar-like oscillations are present in delta Scuti stars. Longer observations, however, show that the modes interpreted as solar-like oscillations have either very long mode lifetimes ...
Antoci, V., Arentoft, T., Cunha, M., Handler, G., Houdek, G., Kjeldsen, H., Lueftinger, T., Murphy, S., Trampedach, R.   +8 more
core   +2 more sources