Device for measuring section void fraction of two-phase fluids

Abstract

The invention aims to provide a device for measuring section void fraction of two-phase fluids. The device comprises a laser, a gas-liquid two-phase fluid passage, a high-speed camera and a computer, wherein the gas-liquid two-phase fluid passage is a transparent container and is filled with a liquid and bubbles, and a fluorescent agent is dissolved in the liquid; the laser is located on one side of the gas-liquid two-phase fluid passage and used for irradiating a to-be-measured section of the gas-liquid two-phase fluid passage; the high-speed camera equipped with a filter lens is connected with the computer; and the high-speed camera is used for shooting the to-be-measured section irradiated by the laser and transmitting a shot picture the computer. The device not only can perform measurement under the condition that a fluid flowing field is not influenced, but also can measure the section void fraction of one point in the passage visually and accurately; equipment such as a contact type probe and the like cannot be involved, so that a to-be-measure fluid is prevented from being disturbed with a traditional method; and radiation rays are not adopted, so that the device is safer and more reliable.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device for the cross-sectional gas fraction of a two-phase fluid. Background technique [0002] Gas-liquid two-phase flow is widely used in industrial processes. The cross-section gas fraction (the ratio of the gas phase to the total flow channel cross-section on a certain cross-section of the two-phase flow) is an important parameter of the gas-liquid two-phase flow, and plays an important role in the study of the two-phase flow. However, due to the limitations of the current theoretical calculation model, experimental measurement is the main research method to study the fraction of voids in gas-liquid two-phase flow. Common measurement methods include gamma radiation measurement, probe measurement and so on. [0003] The first gamma radiation measurement method is based on the principle that gamma rays will be absorbed and reflected when penetrating the material, and its inte...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the direct insertion of the probe has a great impact on the flow field, and it is easy to miss small air bubbles, resulting in a large error

[0005] So far, there is still a lack of a measurement device that can measure local and average cross-sectional gas fractions in an intuitive, safe and accurate manner without affecting the flow field.

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