Results 81 to 90 of about 290,148 (203)

A comparative study on welding characteristics and mechanical properties of Ti–6Al–4V laser welded joints under the sub-atmospheric pressure and beam oscillation

Journal of Materials Research and Technology
Sub-atmospheric pressure environment and oscillation laser are both excellent ways to improve welded joint quality. However, the differences in their effects and mechanisms are unclear.
Haofeng Sun, Bingxiao Xu, Ruihan Li, Fuyun Liu, Chao Fu, Lianfeng Wei, Caiwang Tan   +6 more
doaj   +1 more source

A numerical investigation of self-sustained cavity flow oscillations

, 2000
Two-dimensional (2-D) cavity flow physics and oscillation control were investigated through solutions of the Reynolds-Averaged Navier-Stokes equations coupled with a two-equation k-? turbulence model.
Chen, Xiao-Xian
core  

A likely outcome of the sunspot peaks' influence on the North Atlantic Oscillation and Europe in winter

Meteorologische Zeitschrift, 2014
The effect on the North Atlantic Oscillation of 15 sunspot peaks depends on whether the Oscillation is in-phase or out-of-phase with the sunspot peaks. When it is in-phase the anomalies of sea-level pressure adds to the average pressure distribution, and
Harry van Loon
doaj   +1 more source

Low frequency pressure oscillation study, phase 1 Interim study [PDF]

Characteristics of low frequency pressure oscillations in Apollo spacecraft ...
Lytle, A., Shew, T.
core   +1 more source

Experimental Study and Numerical Simulation of Oscillation Phenomena in a Pressure Swirl Injector

Aerospace
In this study, experiments and numerical simulations were conducted to investigate the oscillation phenomena in a pressure swirl injector. The flow field was captured using high-speed photography, and the gray values were analyzed using the Matlab image ...
Juan Liu, Yifan Han
doaj   +1 more source

Experimental investigation of piloted flameholders [PDF]

Four configurations of piloted flameholders were tested. The range of flame stabilization, flame propagation, pressure oscillation during ignition, and pressure drop of the configurations were determined.
Guo, C. F., Xie, Q. M., Zhang, Y. H.
core   +1 more source

Characterization and scanning probe spectroscopy of radiation-pressure induced mechanical oscillation of a microcavity [PDF]

, 2005
Microcavities can enter a regime where radiation pressure causes oscillation of mechanical cavity eigenmodes. We present a detailed experimental and theoretical understanding of this effect, and report direct scanning probe spectroscopy of the micro ...
Carmon, T., Kippenberg, T. J., Rokhsari, H., Vahala, K. J.   +3 more
core  

Convergence and optimality of the adaptive nonconforming linear element method for the Stokes problem

, 2013
In this paper, we analyze the convergence and optimality of a standard adaptive nonconforming linear element method for the Stokes problem. After establishing a special quasi--orthogonality property for both the velocity and the pressure in this saddle ...
Hu, Jun, Xu, Jinchao
core   +1 more source

Pressure Oscillation in RHIC Cryogenic System [PDF]

AIP Conference Proceedings, 2004
Horizontal beam vibration around 10 Hz in the Relativistic Heavy Ion Collider (RHIC) have been identified and the possible sources to cause this vibration have been investigated. To determine the helium pressure oscillations as a possible primary vibration source, helium pressure measurements were carried out in the five cryogenic transfer lines at two
openaire   +1 more source

Pressure Pulses Generated by Cloud Cavitation [PDF]

, 1996
This paper describes an experimental investigation of the large unsteady and impulsive pressures which are experienced on the suction surface of both an oscillating and static hydrofoil as a result of cloud cavitation. The present experiments used piezo-
Brennen, C. E., Reisman, G. E.
core