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A Flow Velocity Measurement System Based on High Voltage Discharge

A velocity measurement and high-voltage discharge technology, applied in fluid velocity measurement, velocity/acceleration/impact measurement, measurement devices, etc., can solve the problems of increasing system complexity and cost, and achieve a wide range of flow field velocity measurement, low cost, simple effect

Active Publication Date: 2021-12-03
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these technologies are based on expensive laser light sources, greatly increasing system complexity and cost

Method used

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  • A Flow Velocity Measurement System Based on High Voltage Discharge
  • A Flow Velocity Measurement System Based on High Voltage Discharge

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specific Embodiment

[0027] The power supply 1 includes two output parts: a DC regulated output and a high voltage output, wherein: the voltage of the DC regulated output is adjustable to provide power support for the camera 4 and the information processing module 6; the high voltage output is a DC pulse high Piezoelectric or AC high voltage, the output voltage, current and frequency of the high voltage are adjustable. The active electrode 2 and the passive electrode 3 are respectively connected to the high voltage output end, so as to realize the periodic increase of the voltage loaded on both ends of the active electrode 2 and the passive electrode 3 . The active electrode 2 and the passive electrode 3 are placed in the flow field at the same time, wherein the active electrode 2 is placed at the lower end of the flow field, and the passive electrode 3 is placed at the top of the flow field and directly above the active electrode 2 . The active electrode 2 freely breaks down the air in the flow f...

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Abstract

The invention discloses a flow field velocity measurement system based on high-voltage discharge, which comprises a high-voltage power supply (1), two sets of discharge electrodes (2), (3), a camera (4) arranged on one side of the two sets of discharge electrodes, a connection The feedback circuit (5) and the information processing module (6) at the common discharge output end of the two sets of discharge electrodes break down the air in the flow field through high-voltage discharge to generate plasma, and record the time interval and time interval of the discharge induced by the plasma moving with the flow field. The displacement of the plasma, thereby obtaining velocity information. Compared with the prior art, the present invention has low cost and is easy to be coupled to other devices; it solves the limitation of the upper limit of velocity measurement and has a wide range of flow field velocity measurement, and can realize both low-speed flow field measurement of traditional technology and high-speed flow field measurement , supersonic flow and supersonic velocity measurement, no upper limit of velocity measurement, has a wide range of application prospects.

Description

technical field [0001] The invention relates to the technical field of high-voltage discharge and the technical field of flow field velocity measurement, in particular to a device for measuring flow field velocity by using high-voltage discharge. Background technique [0002] Accurate measurement of flow field velocity is of great significance in the fields of aerospace and combustion. At present, relatively mature commercial flow field velocity measurement devices mainly include pitot tube velocity measurement method and hot wire anemometer velocity measurement method. Among them, the pitot tube speed measurement method obtains the flow field velocity information through the method of pressure difference; the hot wire anemometer speed measurement method obtains the flow field velocity information through the change of the hot wire resistance. Both methods are invasive measurement methods. For example, a hot wire anemometer needs to place filaments on the order of several ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/18
CPCG01P5/18
Inventor 高强李博李中山
Owner TIANJIN UNIV
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