SU1511651A1 - Device for determining content of liquid in gas and liquid flow - Google Patents

Abstract

The invention relates to a measurement technique and can be used for measurements in non-stationary gas-liquid flows. The purpose of the invention is to improve the accuracy of determining the fluid content in non-stationary polydisperse gas-liquid flows. The device comprises a pipeline 1 for supplying the test flow, a transparent chamber 2 hermetically integrated into it, an additional annular polished inside chamber 3, in which monochromatic light sources 4 are placed and the radiation receiver 5 so that the optical axes of the sources 4 are offset relative to the axis of the receiver 5. radiation of sources 4, repeatedly reflecting from the walls of the polished chamber 3 and from the interface, is detected by the receiver 5. Moreover, due to the multiple scattering at the boundaries of voids in the liquid The receiver signal 5 is proportional to the volume of these voids and does not depend on the properties of gas inclusions, which improves the accuracy when measuring in polydisperse stationary gas-liquid flows. 1 il.

Description

t (21) 4246308 / 31-25

(22) 05/15/87

(46) 09/30/89. Bul Number 36

(71) Moscow Aviation Institute. Sergo Ordzhonikidze

(72) A.L. Dushkin

(53) 535.242 (088.8)

(56) Gurevich M.M. Photometry. Energoatomizdat, 1983, p. 236.

Optical and titrimetric analyzers of liquid media. Reports of the All-Union Conference, Tbilisi, 1971, p. 296.

(54) DEVICE FOR DETERMINING THE CONTENT OF LIQUID IN GAS-LIQUID FLOW

(57) The invention relates to a measurement technique and can be used when measuring in non-stationary gas-liquid flows. The goal ::: of the invention is to improve the accuracy of determining the fluid content in non-stationary polydisperse gas-liquid flows. The device comprises a pipeline 1 for supplying the test flow, a transparent chamber 2 hermetically integrated into it, an additional annular polished inside chamber 3, in which monochromatic light sources 4 are placed and the radiation receiver 5 so that the optical axes of the sources 4 are offset relative to the axis of the receiver 5. radiation sources 4, repeatedly reflected from the walls of the polished chamber 3 and from the interface, are fixed by the receiver 5. Moreover, due to the multiple scattering at the boundaries of voids in Liquids signal receiver 5 is proportional to the volume of the void and does not depend on the properties of gas inclusions, which increases the accuracy in the measurements in polidispersngh non- stationary gas-liquid flows. 1 il.

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ABOUT)

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The invention relates to a measurement technique and can be used to measure 51x in non-stationary gas-liquid flows.

The purpose of the invention is to improve the accuracy of determining the fluid content in a non-stationary polydisperse gas-liquid flow.

The drawing shows a diagram of the proposed device.

The device comprises a pipeline 1 with a channel for the passage of a gas-liquid flow, a transparent cylindrical chamber 2, hermetically embedded in the pipeline 1, an additional annular chamber polished inside the chamber 3 (covering the chamber 2, sources of radiation 4 located in the chamber 3 in two perpendicular to the axis of the pipeline planes, radially and uniformly, the sources 4 being recessed into the camera body, the photoelectric radiation receiver 5 being recessed into the body of the camera 3 and located between the flat plates in which the sources are located, 4 radiation The device contains elements 6 for attaching an additional camera 3 to the transparent camera 2 with the possibility of axial movement of the camera 2, made in the form of cuffs.

The device works as follows.

When the radiation sources 4 are turned on, the light fluxes pass through the transparent wall of the annular chamber 2 are scattered at the borders of bubbles or droplets and are reflected from the walls of the additional chamber 3 and are again scattered at the phase boundaries. Thus, in the presence of a gas-liquid flow in the pipeline 1, the incident energy is partially absorbed by the material of the walls of the chamber 2 and the liquor in the trz pipeline 1, and only the scattered part of the energy gets to the receiver 5 proportional to the volume of gas inclusions. The direct radiation of the sources 4 is not detected by the receiver 5, since their optical axes are displaced one relative to the other. Multiple scattering at interfacial boundaries provides the most complete detection of the volume of gas voids compared to a single one. Repeated scattering eliminates the individual properties of the particles by integrating the intensity of the light scattering through the volume and allows 11651 4

measure the total volume occupied by inclusions in the total volume. This leads to an increase in accuracy when measuring in polydisperse unsteady gas-liquid flows, where there are strong differences in the individual properties of the particles.

The amount of fluid is determined by

-10 as the difference between the volume of the chamber 2 and the volume - of voids. The device allows the additional chamber 3 to be moved along the axis of the chamber 2, which is necessary for the study of flows with phase transitions 5. Non-stationary photoelectric receiver signal

captures on the oscilloscope screen; or transmitted to the computing facilities. Also

20 can connect analyzer

spectrum to detect nonstationary laws of motion of a multiphase mixture and a voltmeter of root-mean-square values, 25 The tests performed have shown the possibility of measuring the liquid content in a gas-liquid flow, which in its accuracy is not inferior to that of a radio frequency device,

thirty

Claims (1)

 Invention Formula A device for determining the content of a liquid in a gas-liquid flow comprising a pipeline with a channel for passing a gas-liquid flow, a cylindrical chamber, a receiver and a radiation source that is hermetically integrated into the channel, characterized in that it is new. 40 of the accuracy of determining the fluid content in a non-stationary, dispersed gas-liquid flow, at least one additional source of radiation is introduced into it, the cylinder 45 is filled with wavelength-transparent radiation from sources of material, and an additional one is installed on the outside of the cylindrical chamber. a ring polished inside the chamber, in which directional radiation sources are installed, located in two perpendicular axes of the pipeline planes, radially and uniformly in each plane, and the radiation receiver is mounted between the planes, wherein the radiation source and the receiver are recessed into the body of the additional annular chamber. 55