Two-phase flow measurements with sharp-edged orifices

Lin, Zhe

doi:10.1016/0301-9322(82)90071-4

Cited by 146 publications

(62 citation statements)

References 5 publications

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“…Considerable theoretical and experimental studies have been published to describe mathematical models of Venturis in multiphase flow applications. The study of multiphase flow through contraction meters is described for example by (Murdock 1962; R. V. Smith & Leang 1975;Chisholm 1967;Chisholm 1977;Lin 1982;de Leeuw 1994;Steven 2002). All of these correlations depend either on the mass flow quality, x or empirical constants.…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow

Hasan

Lucas

2011

Nuclear Engineering and Design

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Annular gas-liquid two phase flow is widely encountered in the nuclear industry. Various combinations of techniques have been employed in annular gas-liquid two phase flows to measure the flow parameters (e.g. liquid film thickness, gas volume fraction and the phase flow rates). One of the most useful techniques which has proven attractive for many multiphase flow applications is the electrical conductance technique. This paper presents an advanced Conductance Multiphase Venturi Meter (CMVM) which is capable of measuring the gas volume fractions at the inlet and the throat of the Venturi. A new model was investigated to measure the gas flow rate. This model is based on the measurement of the gas volume fractions at the inlet and the throat of the Venturi meter using a conductance technique rather than relying on the prior knowledge of the mass flow quality x. We measure conductance using two ring electrodes flush with the inner surface of the Venturi throat and two ring electrodes flush with the inner surface of the Venturi inlet. The basic operation of the electrical conductance technique in a multiphase flow is that the conductance of the mixture depends on the gas volume fraction in the water. An electronic circuit was built and calibrated to give a dc voltage output which is proportional to the conductance of the mixture which can then be related to the water film thickness in annular flow (and hence to the gas volume fraction). It was inferred from the experimental results that the minimum average percentage error of the predicted gas mass flow rates (i.e. -0.0428 %) can be achieved at the optimum gas discharge coefficient of 0.932.

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Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow

Hasan

Lucas

2011

Nuclear Engineering and Design

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“…Accordingly, the pressure difference across the break can be calculated based on gas-liquid two-phase flow orifice equation. Here, the orifice chemical engineering research and design 1 0 2 ( 2 0 1 5 ) 161-170 Lin (1982) is used to calculate the pressure difference at the break.…”

Section: 5mentioning

confidence: 99%

An experimental investigation of phase separation of gas–liquid two-phase flow through a small break

Liang

Song

Sun

2015

Chemical Engineering Research and Design

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“…In the past decades, numerous publications dealing with both the experimental and theoretical aspects of the problem have appeared in the literature. Among these are the work by Murdock [13], James [14], Chisholm [15,16], Smith and Leang [17], Smith and Murdock [18], Lin [19]. By modifying either ideal separated¯ow or homogeneous¯ow model, various models were developed using experimental measurements within limited range of operating conditions.…”

Section: List Of Symbolsmentioning

confidence: 99%

Theoretical analysis of pressure-drop type instabilities in an upflow boiling system with an exit restriction

Cao

Kakaç

Liu

et al. 2001

Heat and Mass Transfer

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In this work, two-phase¯ow pressure-drop type instabilities in an up¯ow boiling system are studied theoretically. Dynamic simulations of the pressure-drop type instabilities require the knowledge of the steady state characteristics of the system in terms of the pressure drop versus the mass¯ow rate. In a boiling system with an exit restriction at the outlet of the boiling channel, the pressure drop through the system concentrates at the exit restriction. Therefore, the correlation of the pressure drop of the two-phase mixture¯owing through the exit restriction (i.e. a sharp-edged ori®ce) is essential in the calculation of the total pressure drop of the system. A model for the exit restriction is developed and compared with the experimental results covering a wide range of vapor quality with different heat inputs and inlet subcoolings. The drift-¯ux model is adopted to predict the steady state characteristics of the boiling system. The dynamic oscillations of the quasi-static pressure-drop type instabilities in the boiling system are simulated and good predictions of the system stability boundary and oscillatory characteristics are obtained when compared with the experimental results.

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Two-phase flow measurements with sharp-edged orifices

Cited by 146 publications

References 5 publications

Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow

Experimental and theoretical study of the gas–water two phase flow through a conductance multiphase Venturi meter in vertical annular (wet gas) flow

An experimental investigation of phase separation of gas–liquid two-phase flow through a small break

Theoretical analysis of pressure-drop type instabilities in an upflow boiling system with an exit restriction

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