Results 51 to 60 of about 290,148 (203)

Experimental Investigation on the High-frequency Pressure Oscillation Characteristics of a Combustion Process in a DI Diesel Engine

Energies, 2020
It is difficult to decompose the in-cylinder pressure of combustion of the direct injection (DI) diesel engine, a transient process associated with complicated oscillation components, because of its steep property. An adaptive cyclic average method based
Xu Zheng, Nan Zhou, Quan Zhou, Yi Qiu, Ruijun Liu, Zhiyong Hao   +5 more
doaj   +1 more source

Parametric survey of longitudinal prominence oscillation simulations [PDF]

, 2013
It is found that both microflare-sized impulsive heating at one leg of the loop and a suddenly imposed velocity perturbation can propel the prominence to oscillate along the magnetic dip.
Chen, P. F., Ji, H. S., Keppens, R., Xia, C., Zhang, Q. M.   +4 more
core   +1 more source

Pressure oscillation of submerged steam condensation in condensation oscillation regime [PDF]

International Journal of Heat and Mass Transfer, 2016
Abstract The condensation oscillation of submerged steam was investigated theoretically and experimentally at the condensation oscillation regime. It was found that pressure oscillation frequency was consistent with the bubble oscillating frequency and there was a quasi-steady stage when bubble diameters remained constant.
Fang Yuan, Daotong Chong, Quanbin Zhao, Weixiong Chen, Junjie Yan   +4 more
openaire   +1 more source

Pressures and Oscillation Frequencies Generated by Bubble-Positive Expiratory Pressure Devices [PDF]

Respiratory Care, 2017
Positive expiratory pressure (PEP) devices are used to assist with airway clearance. Little is known about the therapist-made or commercially available bubble-PEP devices. The aim of this study was to determine the end-expiratory pressures (cm H2O) and oscillation frequencies (Hz) generated when a range of flows were applied to the therapist-made ...
Mary D, Santos, Maree A, Milross, John P, Eisenhuth, Jennifer A, Alison   +3 more
openaire   +2 more sources

Performance Analysis of a Fluidic Axial Oscillation Tool for Friction Reduction with the Absence of a Throttling Plate

Applied Sciences, 2017
An axial oscillation tool is proved to be effective in solving problems associated with high friction and torque in the sliding drilling of a complex well.
Xinxin Zhang, Jianming Peng, He Liu, Dongyu Wu   +3 more
doaj   +1 more source

Water-absorbing capacitor system for measuring relative humidity [PDF]

, 1987
A method and apparatus using a known water-absorbent polymer as a capacitor which is operated at a dc voltage for measuring relative humidity is presented.
Laue, Eric G.
core   +1 more source

The effect of pressure on statics, dynamics and stability of multielectron bubbles

, 2001
The effect of pressure and negative pressure on the modes of oscillation of a multi-electron bubble in liquid helium is calculated. Already at low pressures of the order of 10-100 mbar, these effects are found to significantly modify the frequencies of ...
A. P. Volodin, C. C. Grimes, D. L. Dexter, H. J. Maris, I. F. Silvera, I. F. Silvera, Isaac F. Silvera, J. Classen, J. T. Devreese, J. Tempere, K. W. K. Shung, Lord Rayleigh, Lord Rayleigh, M. M. Salomaa, M. S. Plesset, M. W. Cole, U. Albrecht, V. B. Shikin   +17 more
core   +1 more source

A 1D Analytical Model for Slag Infiltration during Continuous Casting of Steel under Non-Sinusoidal Mold Oscillation

Metals, 2020
A 1D analytical model for slag infiltration during continuous casting of steel is developed to investigate the slag behavior in the mold–strand gap.
Hyunjin Yang
doaj   +1 more source

Synchronization framework for modeling transition to thermoacoustic instability in laminar combustors

, 2020
We, herein, present a new model based on the framework of synchronization to describe a thermoacoustic system and capture the multiple bifurcations that such a system undergoes.
Saha, Abhishek, Sujith, R. I., Unni, Vishnu R., Weng, Yue   +3 more
core   +1 more source

Oscillation threshold of a clarinet model: a numerical continuation approach [PDF]

, 2012
This paper focuses on the oscillation threshold of single reed instruments. Several characteristics such as blowing pressure at threshold, regime selection, and playing frequency are known to change radically when taking into account the reed dynamics ...
Almeida A., Avanzini F., Bruno Cochelin, Christophe Vergez, Dalmont J -P., Doedel E. J., Gazengel B., Karkar S., Keller H. B., Sami Karkar, Saneyoshi J., van Walstijn M., Worman W. E.   +12 more
core   +2 more sources