Visual experiment device and method for testing explosion characteristics of powder/gas/liquid three-phase explosive mixed medium

Abstract

The invention discloses a visual experiment device and method for testing explosion characteristics of a powder / gas / liquid three-phase explosive mixed medium. The experimental device comprises a visual explosion container, an explosive liquid atomization generation system, an explosive gas preparation system, an explosive dust raising system, an ignition system, a pressure acquisition system, a temperature acquisition system, a flame ion acquisition system, an external measurement system and a program control and data acquisition system. The device can realize the construction of explosive dust / explosive gas / explosive liquid three-phase particle cloud, and studies the explosion characteristic and flame propagation behavior of powder / gas / liquid three-phase explosive particle cloud by analyzing the data such as explosion pressure, flame propagation speed, flame temperature, flame fine structure and the like. And the cold transient flow field characteristics of the powder / gas / liquid three-phase explosive particle cloud are obtained by using PIV and PDPA test instruments. The device can be used for researching the explosion characteristic of the multiphase explosive medium.

Description

technical field [0001] The invention relates to the field of experimental devices for mixed explosion of explosive dust, explosive gas and explosive liquid, in particular to an experimental device and method for studying the explosion characteristics and flame propagation behavior of powder / gas / liquid three-phase explosive particle clouds. Background technique [0002] With the agglomeration and scale of industrial industries, the environment of industrial production has become more and more complex, and the environment of production safety accidents has become more and more complex. In explosion disasters, especially secondary explosions and continuous explosions caused by the primary explosion are often A complex environment in which a variety of explosive media (dust, gas, liquid droplets) coexist, but limited by the depth of research and the complexity of the problem, explosion disasters are often classified as the explosion of a single medium, which fails to truly reflec...

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Problems solved by technology

[0003] At present, the multi-window gas / dust / liquid mist explosion suppression comprehensive test device produced by Jilin Hongyuan Scientific Instrument Co., Ltd. in accordance with GB / T16426 can only meet the requirements of gas / dust mixture or gas / liquid mixed explosive two-phase mixed medium explosion. The measurement of parameters cannot realize the research on the explosion of dust / gas / liquid three-phase explosive mixed media

Although the test device described in the domestic patent CN109975354A can satisfy the test of three-phase mixed explosion, it cannot conduct research on the cold transient flow field formed after the three-phase medium is mixed, and it is clear that the independent variable affects the three-phase ion cloud and fog cold transient flow field. The influence of the state flow field is of great significance to the subsequent three-phase particle cloud macro-explosion characteristics and flame propagation behavior

The test device described in the domestic patent CN108645761A can only meet the test of the gas-powder two-phase cold transient flow field, and cannot carry out the research on the cold transient flow field of the three-phase mixed medium, let alone carry out the explosion test

None of the above-mentioned instruments can simultaneously satisfy the requirements for the study of the cold transient flow field characteristics, macroscopic explosion characteristics and flame propagation behavior of three-phase mixed medium particle clouds in the same experimental container. If different containers are used to realize the flow field observation and explosion measurement respectively, both To bear more work and cost, but also to face the impact of changes in the uniformity of the mixed flow field of the three-phase medium and the intensity of turbulence due to the difference between the front and rear devices

[0004] The devices used to study the explosion characteristics of explosive media at home and abroad cannot simultaneously meet the simultaneous measurement of explosion pressure, flame propagation velocity, and flame temperature in the same closed container and the correlation research of the three.

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