Measurement of Two-Phase Gas-Liquid Flow Using Standard and Slotted Orifice

Abstract

The differential pressure of gas measurement is very often used in industrial measurements. During the gas flow, liquid condensation often occurs. The result is that when measuring a gas flow, the gas-liquid mixture is essentially measured. Errors in the indications of measuring instruments are starting to appear due to a change in the properties of the continuous phase, which is gas. In addition, the appearance of liquid droplets leads to flow disturbances and pressure pulsations. Therefore, new methods and tools for measuring the flow of gas-liquid mixture are being sought. The work involves the use of slotted orifices for measuring gas-liquid mixtures. An analysis of the influence of the slotted orifice geometry on the measurement of the biphasic mixture stream was carried out. Standard orifice and three slotted orifices of various designs. The experiment included measuring the air flow with a small amount of water dispersed in the form of drops.

Modeling throttle bridge measuring transducers of physical-mechanical parameters of Newtonian fluids

“…Promising for solving the problems of measuring the properties of fluids is the hydro-gas-dynamic throttle method, based on which many measuring transducers are built [2][3][4][5][6][7][8][9][10][11]. The main components of hydro-gas-dynamic measuring transducers are throttle elements.…”

“…[8]. Turbulent throttle elements (orifice plates, nozzles) are widely used in flowmeters of medium and large flowrates of liquids and gases [9]. Combining laminar and turbulent throttles in measuring transducers makes it possible to measure fluids' kinematic viscosity, density, etc.…”

Uncertainty Assessment for Determining the Discharge Coefficient C for a Multi-Opening Orifice

“…Among commonly known measuring orifices, the standard (centrical) orifice, characterized by accuracy at 1.5-2%, was accepted as a basic model [5,6]. Many researchers around the globe are looking for new solutions for metering orifices to measure fluid flow, which would be characterized by a constant value of discharge coefficient C in a wide range of changes in Reynolds numbers [7,8]. Such a solution seems to come in the form of a flow meter with a flow choking element-a multi-opening orifice.…”

Uncertainty Assessment for Determining the Discharge Coefficient C for a Multi-Opening Orifice

“…Among commonly known measuring orifices, the standard (centrical) orifice, characterized by accuracy at 1.5…2% was accepted as a basic model [5,6]. A great number of researchers around the globe are searching for new solutions for metering orifices to measure fluid flow, which would be characterized by a constant value of discharge coefficient C in a wide range of changes in Reynolds numbers [7,8]. Such a solution seems to come in the form of a flow meter with a flow choking element -a multiopening orifice.…”