Compressible gas-liquid flow through pipeline restrictions

Morris, S.D.

doi:10.1016/0255-2701(91)80007-c

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…In accordance with the two-phase flow results, e.g., by Fr6hlich [6], Schmidt [8,9], Rivas [10], Shannak [11] and Morris [12,13] obtained in abrupt pipe contractions and expansions, it can be deduced that the two-phase flow in a wide range of the mass flow quality have not been contracted. Only at a very narrow range of the air mass flow quality, less than 0.5% and greater than 95% the flow contraction appears, [8,9].…”

supporting

confidence: 84%

Experimental investigation of contraction in single- and two-phase flow through sharp-edged short orifice

et al. 1999

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The flow contraction through sharp-edged short orifices respectively the narrowest flow cross-section or the vena contracta has been measured for water, air and air/water mixture. The results demonstrate that the contraction in the case of subcritical single-phase flow is restricted to values between 0.62 and one, while in the twophase flow it is limited to very narrow ranges of air mass flow qualities where the flow regime is specified as bubbly or spray.

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supporting

confidence: 84%

Experimental investigation of contraction in single- and two-phase flow through sharp-edged short orifice

et al. 1999

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“…In the case that the liquid is fully entrained in the gas phase (ψ = 1) and the oil travels at the same velocity as the gas phase, the homogeneous flow model is obtained, and the effective specific volume is given by Equation 1. The two-phase discharge coefficient C d is obtained by applying the two-phase flow model presented by Morris (1991), which yields a nominal value for C d of 0.77. The throat area of the nozzle is furthermore multiplied by a fictitious correction term X d in order to compensate for correlation uncertainty and additional flow irreversibilities not captured by the isentropic two-phase model.…”

Section: Two-phase Nozzle Flowmentioning

confidence: 99%

Liquid-flooded compression and expansion in scroll machines – Part I: Model development

Bell

Lemort

Groll

et al. 2012

International Journal of Refrigeration

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A detailed mechanistic model has been developed for scroll compressors and scroll expanders with liquid flooding for application to the Liquid Flooded Ericsson Cycle. This model is based on the integration of a set of differential equations that arise from the conservation laws. The impact of the flooding liquid on the working process is also included through mixture properties as well as treatment of two-phase flow pressure drop. With the working process known, it is then possible to solve for the compressor power, total mass flow rate and other model outputs. The fine level of detail in the model allows for the investigation of the impact of design changes to the scroll machines. This model can also be readily extended to allow for the analysis of liquid flooded vapor compression refrigeration.

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“…The inclusion of a gas in the fluid stream reduces a jetting tool's efficiency. A mathematical model was created to predict the gas volume fractions, jet velocities, sonic velocities and impact pressure of a co-mingled fluid [4][5] and was verified using the test fixture. This model indicated that in general, as the gas ratio increases, the density drops at a rate approximately equal to double the rate at which the velocity increases.…”

Section: Liquid/gas Mixturesmentioning

confidence: 99%

Advances in Coiled Tubing Jetting Technology

Campbell¹,

Brunskill²

2000

All Days

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractFor many years, various types of simple nozzles have been regularly used for wellbore cleaning with coiled tubing. This paper describes the advances made in fluid jetting technology, associated tools and the parameters that are crucial to the efficiency of these techniques. A laboratory and field testing programme has been completed and data is included. By detailed design of the internal fluid path, orifice geometry, jet stand off and pump rates, tool effectiveness has now been improved to a level several times more efficient than previously available for the same feed pressures and flow rates. Pre-engineering using computer simulation to optimise the job design parameters has proven essential in designing clean out jobs and sizing the appropriate coiled tubing and pumping equipment. Three distinct categories of tools have emerged; conventional drilled nozzles, non-rotating high-pressure nozzles and high pressure rotating tools. All three types have gained a common advantage from the development of a Downhole Phase Separator. The high-energy losses previously associated with a two-phase fluid necessary in low hydrostatic wells can now be eliminated. A step change in operational efficiency has resulted through combining the major improvements in jetting tool design with the ability to separate gas and liquid phases downhole. With this development, the full benefits of using single phase fluid jetting can be realised in low hydrostatic wells.

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Compressible gas-liquid flow through pipeline restrictions

Cited by 13 publications

References 4 publications

Experimental investigation of contraction in single- and two-phase flow through sharp-edged short orifice

Experimental investigation of contraction in single- and two-phase flow through sharp-edged short orifice

Liquid-flooded compression and expansion in scroll machines – Part I: Model development

Advances in Coiled Tubing Jetting Technology

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