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Device and method for measuring void ratio of liquid metal two-phase flow

A liquid metal and measuring device technology, applied in measuring devices, optical devices, and material analysis through electromagnetic means, can solve problems such as high conductivity, complex equipment, and unavailable optical measurement methods

Inactive Publication Date: 2015-09-02
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Liquid metal two-phase flow has the characteristics of airtight, opaque, high conductivity, etc., making optical measurement methods unusable
In addition, the neutron irradiation method and the X-ray method require complex equipment and require additional equipment to obtain the distribution rate of the bubbles.

Method used

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  • Device and method for measuring void ratio of liquid metal two-phase flow
  • Device and method for measuring void ratio of liquid metal two-phase flow
  • Device and method for measuring void ratio of liquid metal two-phase flow

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Embodiment Construction

[0027] Such as figure 1 As shown, each probe 1 contains three sensors, one end of the sensor is connected to the DC power supply 2, and the other end is grounded, and the voltage difference between the two is detected by the signal collection device 3; when the sensor does not capture air bubbles, the voltage difference is 0 , when the sensor captures air bubbles, the voltage value changes, and this voltage value change time is collected by the device 3.

[0028] The sensors on the probe are distributed in an equilateral triangle, the distance between the probes is L, the tops of the probes are not in the same plane, and the height difference is h respectively; when the bubble is captured by the sensor, the probe will generate a step voltage, when the bubble The voltage returns to normal when leaving the sensor; the relationship between the voltage signals captured by the three sensors and time is as follows: figure 2 ;

[0029] Such as figure 2 As shown, the bubbles are ...

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Abstract

The invention relates to a device and a method for measuring liquid metal two-phase flow void fraction. The device comprises a multi-sensor probe set, a direct-current power source and a data collection and analysis device. Direct current is charged among sensors, and when the sensors are positioned inside liquid metal, the sensors are surrounded by the liquid metal completely, and short circuit occurs; and when the sensors capture bubbles, voltage among the sensors is changed. By the aid of multi-sensor probes, the bubbles can be captured accurately, and size of the bubbles can be analyzed; and approximate distribution of the bubbles at different positions in a flow field can be measured by the probe set composed of the multiple probes in space, and according a numerical value of void fraction is calculated. By the aid of the electrical resistance probe, the device overcomes the defect that an optical method cannot be used for measurement in the liquid metal; and by constructing the three-dimensional probe measurement device and method, accuracy of liquid metal measurement by the electrical resistance probe method is improved.

Description

technical field [0001] The invention relates to a contact measuring device and a measuring method for measuring the distribution of voids in a liquid metal two-phase flow, and calculates the void rate according to the measured void diameter and distribution. Background technique [0002] Lead-based alloys are popular coolants for subcritical drive reactors due to their good proliferation and transmutation properties. When the steam pipe breach accident occurs in the primary circuit heat exchanger, the water in the secondary circuit reacts with the high-temperature liquid lead-based alloy in the primary circuit, and a large number of air bubbles are generated to change the flow field characteristics; the existence of air bubbles may also cause explosions and affect the performance of the heat exchanger. Even the safe operation of the reactor core. Therefore, the study of the diameter, distribution and void ratio of bubbles in superalloys provides experimental guidance and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00G01B11/08
Inventor 姜华磊洒荣园高胜黄群英
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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