scholarly journals Visualization of Weakly Luminous Region of the Cavitation in a Circular Orifice Flow

1995 ◽  
Vol 15 (Supplement1) ◽  
pp. 55-58
Author(s):  
Katsuine TABEI ◽  
Hiroyuki SHIRAI
Keyword(s):  
Circular Orifice ◽  
Orifice Flow ◽  
Luminous Region

Cavitating Orifice: Flow Regime Transitions and Low Frequency Sound Production

2005 ◽  
Author(s):  
Philippe Testud ◽  
Avraham Hirschberg ◽  
Pierre Moussou ◽  
Yves Aure´gan
Keyword(s):  
Sound Production ◽  
Low Frequency ◽  
Broadband Noise ◽  
Detailed Data ◽  
Hydraulic Conditions ◽  
Circular Orifice ◽  
Vapor Cloud ◽  
Orifice Flow ◽  
Flow Through ◽  
Regime Transitions

Detailed data are provided for the broadband noise in a cavitating pipe flow through a circular orifice in water. Experiments are performed under industrial conditions, i.e., with a pressure drop varying from 3 to 30 bars and a cavitation number in the range 0.10 ≤ σ ≤ 0.77. The speed of sound downstream of the orifice happens to vary spontaneously for a given set of hydraulic conditions. In the intermediate ‘developed cavitation’ regime, whistling associated with periodic vortex shedding is observed. In the ‘super cavitation’ regime, a vapor cloud develops itself and the whistling disappears. The broadband noise in each regime is presented and its dimensionless representation is discussed.

scholarly journals External pressure dependence of granular orifice flow: Transition to Beverloo flow

2021 ◽  
Vol 33 (4) ◽  
pp. 043313
Author(s):  
Zheng Peng ◽  
Jiangmeng Zhou ◽  
Jiahao Zhou ◽  
Yuan Miao ◽  
Liyu Cheng ◽  
...  
Keyword(s):  
Pressure Dependence ◽  
External Pressure ◽  
Flow Transition ◽  
Orifice Flow

Modelling of Orifice Flow Rate at Very Small Openings

2003 ◽  
Vol 4 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Duqiang Wu ◽  
Richard Burton ◽  
Greg Schoenau ◽  
Doug Bitner
Keyword(s):  
Flow Rate ◽  
Orifice Flow

Forced and Periodic Vortex Breakdown

1967 ◽  
Vol 89 (3) ◽  
pp. 609-615
Author(s):  
Turgut Sarpkaya
Keyword(s):  
Experimental Study ◽  
Opposite Direction ◽  
Vortex Tube ◽  
Vortex Breakdown ◽  
Swirling Flow ◽  
Typical Data ◽  
Circular Orifice ◽  
Pros And Cons

The results of an experimental study of the forced and periodic breakdown of a confined vortex rotating in the opposite direction are presented. The vortex tube consists of two chambers connected by a short conduit through streamlined transitions. The upstream end is closed by a plain wall, and a circular orifice is provided at the downstream end. The swirling flow and the breaker-vortex are generated by introducing varying proportions of air or water through tangential ports located near the upstream and downstream walls of the unit. The cases of single breakdown and periodic breakdown are explored and typical data are presented for each case. Finally, the pros and cons of the two existing transition theories are discussed.

Effect of Viscosity on Vortex-Orifice Flow

1968 ◽  
Vol 94 (3) ◽  
pp. 745-752
Author(s):  
paul B. Zielinski ◽  
James R. Villemonte
Keyword(s):  
Orifice Flow

Closure to “Effect of Viscosity on Vortex-Orifice Flow”

1969 ◽  
Vol 95 (5) ◽  
pp. 1736-1737
Author(s):  
Paul B. Zielinski ◽  
James R. Villemonte
Keyword(s):  
Orifice Flow

Determination of pumping speed and its impact on the overall uncertainty budget of the CMI orifice flow standard

Metrologia ◽  
2008 ◽  
Vol 45 (3) ◽  
pp. 368-375 ◽  
Author(s):  
L Peksa ◽  
T Gronych ◽  
P Řepa ◽  
J Tesař ◽  
M Vičar ◽  
...  
Keyword(s):  
Uncertainty Budget ◽  
Orifice Flow
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