Dryness measurement system and method of gas-liquid two-phase fluid under high temperature and high pressure

A high-temperature, high-pressure, measurement system technology, applied in the direction of material analysis using radiation, can solve the problems of decreased accuracy and inability to measure, and achieve the effect of simple structure and simple measurement of dryness of two-phase fluid

Inactive Publication Date: 2019-08-16
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a system and method for measuring the dryness of gas-liquid two-phase fluid under high temperature and high pressure, which overcomes the shortcomings of traditional measurement methods such as decreased accuracy and inability to measure due to the substantial increase in temperature and pressure.

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  • Dryness measurement system and method of gas-liquid two-phase fluid under high temperature and high pressure
  • Dryness measurement system and method of gas-liquid two-phase fluid under high temperature and high pressure
  • Dryness measurement system and method of gas-liquid two-phase fluid under high temperature and high pressure

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Embodiment Construction

[0052] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0053] According to the knowledge of gas-liquid two-phase fluid dynamics, there is a certain functional relationship between the two-phase coherence degree and the two-phase volumetric gas fraction, and the specific expression is

[0054]

[0055] In the formula:

[0056] x—gas-liquid two-phase fluid dryness;

[0057] β—gas-liquid two-phase fluid volumetric gas fraction;

[0058] ρ L — liquid phase density;

[0059] ρ G - gas phase density.

[0060] Substituting the measured volume gas fraction β into the above formula, the dryness value of the two-phase fluid can be obtained. Although there are many measurement methods for volumetric gas content, most of them focus on non-heating or low temperature conditions. There is still no effective method for the measurement of this parameter ...

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Abstract

The invention discloses a dryness measurement system and method of a gas-liquid two-phase fluid under high temperature and high pressure. The dryness measurement system comprises radioactive source, afront collimator, a vertical pipe, a rear collimator and a photoelectric multiplier, wherein a ray line generated by the radioactive source passes through the front collimator, irradiates from one side of the vertical pipe and irradiates out from the other side of the vertical pipe, and the emitted ray line enters the photoelectric multiplier after passing through the rear collimator. The invention also discloses a method for measuring dryness. A pure-gas phase fluid, a pure-liquid phase fluid and the gas-liquid two-phase fluid are introduced into the vertical pipe, the ray intensity of the three fluids correspondingly entering the photoelectric multiplier is measured, the cross section air content of the gas-liquid two-phase fluid is calculated according to a cross section air content measurement formula of the gas-liquid two-phase fluid, and the dryness of the gas-liquid two-phase fluid is solved according to an existing Armand calculation formula and a dryness calculation formula.By an on-line measurement mode, non-interference data acquisition can be achieved for fluid moving, and the accuracy of a measurement result is ensured.

Description

technical field [0001] The invention belongs to the technical field of gas-liquid two-phase fluid dryness measurement, and in particular relates to a gas-liquid two-phase fluid dryness measurement system and method under high temperature and high pressure. Background technique [0002] The phenomenon of gas-liquid two-phase fluid flow widely exists in thermal power, nuclear power, refrigeration, petroleum, chemical industry and other industrial fields related to national development. Compared with phase fluid, it has high complexity, and there is still no unified theory to explain this complex problem. The gas-liquid two-phase fluid dryness is an extremely important parameter to control the amount of steam in thermal power plants, nuclear power, petroleum and other industries. It is a representative parameter to explain the difference between two-phase fluids and single-phase fluids. The basic parameters of parameters such as rate and density. So far, the operating conditi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/12
CPCG01N23/12
Inventor 赵于刘红杨胡晓玮
Owner SHAANXI UNIV OF SCI & TECH
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