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Multi-Electrode Sensors for Determining Gas Content in Two-Phase Flows

A gas content, sensor technology, applied in the field of sensors, can solve the problems of inability to detect the potential surge of bubbles, inaccurate real content, etc.

Active Publication Date: 2015-11-25
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the air bubble content measured by such conventional sensors is inaccurate compared to the real content of air bubbles formed in the flow section of the pipe section in which the sensor is installed
[0008] This problem becomes particularly acute when the air bubble content measured by such conventional sensors corresponds to the average content across the entire flow section of the sensor, whereby the measured content cannot detect potential surges of air bubbles on a very local scale

Method used

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  • Multi-Electrode Sensors for Determining Gas Content in Two-Phase Flows
  • Multi-Electrode Sensors for Determining Gas Content in Two-Phase Flows
  • Multi-Electrode Sensors for Determining Gas Content in Two-Phase Flows

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Embodiment Construction

[0076] The sensor according to the invention comprises a bushing 10 and a switching and measuring member 50 .

[0077] Figure 1 to Figure 4 In , a non-limiting embodiment of a bushing 10 according to the invention is shown.

[0078] In the embodiment shown, the sleeve 10 of the sensor has five measuring electrodes 1 to 5 which are spaced apart and registered with each other so as to define in pairs four subdivided spaces A to D which The space subdivides the flow section of the sleeve 10 .

[0079] Measuring electrodes 1 to 5 are coaxial, surrounding each other around a common axis defining the axial direction of sleeve 10 , presenting a circular section in a section plane perpendicular to said common axis.

[0080] The measuring electrodes 1 to 5 are cylindrical rotating bodies.

[0081] The outer body of the sleeve 10 defining the flow section forms the measurement electrode 1 furthest from the common axis, so that the outer body of the sleeve 10 is generally cylindrical...

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Abstract

A sensor for determining gas content of a two phase fluid flowing in a flow line, the sensor including a sleeve configured to be arranged in the flow line in a stream of fluid. The sleeve includes a plurality of measurement electrodes that, in pairs, define a plurality of subdivision spaces subdividing a flow section of the sleeve. The sensor also includes switch and measurement members coupled to the measurement electrodes to control switching of each subdivision space of the sleeve between a measuring state and a non-measuring state. The switch and measurement members are configured to selectively switch the state of each of the subdivision spaces independently of one another.

Description

technical field [0001] The present invention relates to the field of sensors for determining the gas content of a two-phase fluid flowing in a flow tube installed in any industrial application, such as a rocket or other engine. [0002] Especially in aerospace applications, knowledge of the volume fraction of gas present in a liquid has many applications. [0003] For example, rocket motor turbopumps are supplied with cryogenic propellants, specifically liquid hydrogen and liquid oxygen. At the pump inlet, the gas present in the liquid hinders the fluid flow, with the risk of cavitation that can cause the turbopump to run dry. Therefore, it is very important for this application to be able to identify and measure the gas present in the supplied propellant. Background technique [0004] Conventional capacitive sensors are known with two electrodes adapted to be arranged in a pipeline in a two-phase fluid flow flowing in the pipeline. The first of the two electrodes constit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/22G01N33/28
CPCG01N27/221G01F1/74
Inventor 菲利浦·尼威特阿兰·布鲁埃尔狄狄而·玛塔瑞恩
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A