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Unconstrained gas cloud deflagration experiment device and test method

The technology of an experimental device and testing method is applied in the direction of measuring device, measuring flow/mass flow, liquid/fluid solid measurement, etc., which can solve problems such as interference of experimental data accuracy, and achieve the effect of avoiding errors and improving safety

Pending Publication Date: 2022-03-01
ANHUI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method can solve the problem of combustible gas cloud deflagration flame observation, the initial concentration of the premixed gas and the ground shock wave reflection cause great interference to the accuracy of the experimental data.

Method used

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  • Unconstrained gas cloud deflagration experiment device and test method
  • Unconstrained gas cloud deflagration experiment device and test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An unconfined gas cloud deflagration experimental device such as figure 1 As shown, the latex balloon 9 is installed on the balloon fixed nozzle 5, and then the latex balloon support 6 is installed; the mobile slider 10 of the adjustment device support 11 controls the height of the balloon from the ground; the oxidizing gas cylinder 1 and the combustible gas cylinder 2 are used for preparation For premixed gas, the gas cylinder is equipped with a corresponding pressure reducing valve 3 to control the pressure of the gas delivery; the gas volume flowmeter 4 connected to the gas guide pipe 7 accurately controls the amount of intake air; the gas guide tube 7 and the ignition electrode 8 from The perforation on the fixed nozzle 5 of the balloon stretches into the latex balloon, and the ignition electrode remains at the center of the latex balloon; the ignition electrode 8 is connected with the intelligent control system 14, the high-speed camera 12, the pressure sensor 13 an...

Embodiment 2

[0030] In this example, the gas distribution uses acetylene-air mixed gas to illustrate the operation steps of a test method for an unconfined gas cloud deflagration experimental device:

[0031] St1: Fix the 18-inch transparent latex balloon 9 on the balloon fixing nozzle 5, and seal the interface between the air guide tube 7 and the ignition electrode 8 and the nozzle with a sealing element. The moving slide block of adjustment device support 11 allows the ignition position of balloon to be apart from ground 1m.

[0032] St2: Adjust the outlet pressure of gas cylinders 1 and 2 to 0.05Mpa, and set the parameters of gas volume flow meter 4 so that the volume ratio of the filled balloon is 8:92 (acetylene:air).

[0033] St3: When the volume passing the flowmeter reaches the preset condition, the pressure reducing valve / return valve 3 is closed immediately.

[0034] St4: Remotely start the intelligent control system 14, ignition combiner and data acquisition system 15. After a ...

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Abstract

The invention discloses an unconstrained gas cloud deflagration experimental device and a test method, which are characterized in that a latex balloon is fixed on a height-adjustable stainless steel bracket through a gas nozzle, combustible gas and air with certain volume concentration are filled into the balloon by using a gas distribution system, and the gas is ignited after being uniformly mixed. Flame propagation and deflagration overpressure distribution in the combustible gas cloud membrane rupture process are collected in real time through a high-speed camera shooting optical testing system and a dynamic pressure monitoring system, image data are subjected to batch processing in combination with autonomously written program codes, and the flame speed is extracted. According to the method, gas explosion related theories and analysis characteristics of a high-speed camera are fully utilized, the Python algorithm is utilized to perform batch operation on flame images to obtain the accurate flame propagation speed, and the method is of great significance to prevention and control of unconstrained gas cloud explosion disasters formed by gas leakage in the industrial field. The device is simple in structure and operation steps, the initial gas cloud size and the ground clearance can be actively adjusted according to experiment requirements, the measurement result is visual and real, and popularization is easy.

Description

technical field [0001] The present invention relates to an unconstrained gas cloud deflagration experimental device and testing method. More specifically, a latex balloon is used to fix the initial combustible gas cloud, the height from the ground is adjustable, and high-precision image data is extracted by independently writing codes. Monitoring data to explore the explosion mechanism and influencing factors of unconfined gas clouds. The invention belongs to the technical field of gas deflagration test. Background technique [0002] In the context of global fossil fuel shortage and serious environmental pollution, combustible gas, as a clean fuel, has been widely used in energy, chemical and other fields, and the number of accidental gas explosions is also increasing. Zhu et al. (Journal of Loss Prevention in the Process Industries, 2015) evaluated about 174 gas explosion accidents that occurred between 1940 and 2010 and found that the unconstrained steam cloud explosion f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01F1/00
CPCG01N31/12G01F1/00
Inventor 王文涛王中华蒋八运李子涵李世周
Owner ANHUI UNIV OF SCI & TECH
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