A high-pressure air large-flow on-site calibration device and method

A field calibration, high-pressure air technology, used in testing/calibration devices, measuring devices, liquid/fluid solids measurement, etc. The effect of rapid and uniform gas temperature field and reduced error

Active Publication Date: 2020-03-03
XIAN AEROSPACE PROPULSION INST
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  • Abstract
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  • Claims
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Problems solved by technology

The study found that if the flow coefficient obtained under the condition of low pressure and small flow is applied to the condition of high pressure and large flow, the measured air flow will produce a large error, making the measurement accuracy relatively poor, and it is difficult to meet the use requirements

Method used

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  • A high-pressure air large-flow on-site calibration device and method
  • A high-pressure air large-flow on-site calibration device and method
  • A high-pressure air large-flow on-site calibration device and method

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Embodiment Construction

[0072] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings, so that those skilled in the art can understand and implement the present invention.

[0073] The present invention is an air flow meter calibration device, see figure 1 , the high-pressure air large-flow on-site calibration device of the present invention includes a high-pressure air source system 1, a main pipe 2, a cooling water system 3, a measurement control system 4, and a flow secondary standard system 5, which are sequentially arranged on the main pipe along the high-pressure and large-flow air flow direction. Pressure regulating device 6, voltage stabilizing and rectifying device 7, calibrated air flow meter 8, tee pipe 9, quick reversing valve 10 and standard container 11 on road 1;

[0074] The air outlet of the air flowmeter 8 to be calibrated is connected with the air inlet of the three-way pipe 9, one air outlet of the three-way pipe...

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Abstract

The invention relates to a high-pressure air large-flow on-site calibration device and method. The device includes a high-pressure air source system, a main pipeline, a cooling water system, a measurement control system, a flow secondary standard system, a pressure regulating device, a voltage stabilizing rectifier, Air flow meter, tee, quick change valve, and standard container. The steps of the calibration method of the device are: 1) primary calibration of the air flow meter to be calibrated; 2) secondary calibration of the air flow meter to be calibrated. The invention comprehensively simulates the real working high pressure and large flow environment of the air flowmeter, realizes the calibration of the air flowmeter, and obtains the flow coefficient of the air flowmeter under the real use condition of high pressure air and large flow.

Description

technical field [0001] The invention belongs to the technical field of air flow meter calibration, and in particular relates to a high-pressure air large-flow on-site calibration device and method. Background technique [0002] In the calibration of air flow meters, especially in supersonic and hypersonic wind tunnels, the air flow that needs to be provided is getting larger and higher, and the pressure is getting higher and higher. The inlet pressure of a single air flow meter has reached 23MPa, and the flow has reached 60kg / s. [0003] Since there is no high-pressure and large-flow calibration device with such corresponding conditions at present, the air flowmeter can only be calibrated under the condition of low pressure and small flow to obtain the flow coefficient of the flowmeter, and it can be used directly under the condition of high pressure and large flow. The study found that if the flow coefficient obtained under the condition of low pressure and small flow is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F25/00
CPCG01F25/17
Inventor 边东伟程树伟李彤雷博娟孙志强佘彩青张鹤平
Owner XIAN AEROSPACE PROPULSION INST
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