Test method of open space large-sized combustible gas cloud explosion three-dimensional overpressure field

Abstract

The invention provides a test method of an open space large-sized combustible gas cloud explosion three-dimensional overpressure field. The method comprises a three-dimensional pressure sensor array establishment method, a pressure data acquisition method, a synchronous triggering method and a gas supply system establishment and combustible gas cloud forming method; and the open space large-sized combustible gas cloud explosion three-dimensional overpressure field consists of a three-dimensional pressure sensor array, a synchronous triggering system, a signal regulation system, a pressure data acquisition system, a power supply system and a gas supply system. A three-dimensional multipoint pressure sensor test array is established in multiple directions at different heights by surrounding a gas cloud center. Two pressure data acquisition ways, i.e., a pressure data self-acquisition way and a synchronous triggering pressure data acquisition way are adopted, and the field is synchronously triggered by the synchronous triggering system and an ignition apparatus. The gas supply system is used for forming combustible gas cloud at a certain height, an ignition ball shot by the ignition and shooting apparatus is used for igniting the combustible gas cloud to form the overpressure for test, so that data support is provided for inverting and reestablishing the three-dimensional overpressure field, and data evidence is provided for formulating a safety distance and standard.

Description

technical field [0001] The invention belongs to the field of gas deflagration testing, in particular to an open space large-scale combustible gas cloud explosion overpressure testing system. Background technique [0002] The overpressure generated by a large-scale combustible gas cloud explosion is relatively large, which may cause huge damage. A large amount of combustible gas may leak from gas storage tanks or gas pipelines, diffuse and mix in the air to form a large-scale gas cloud explosion mixture , once the gas cloud is ignited, it will explode, and the overpressure generated by the explosion still has a great destructive effect in the open space. Therefore, it is necessary to conduct full-scale blasting experiments and test the overpressure generated by gas cloud explosions for the determination of safety distances and the formulation of safety standards. [0003] At present, my country has built the first (the largest in Asia) full-scale natural gas pipeline blastin...

AI Technical Summary

Problems solved by technology

Aiming at the above problems, the present invention proposes a three-dimensional layout method for sensors and their mounting rods, adopting high-altitude array three-dimensional layout for shock wave overpressure measuring points; pressure data acquisition system adopts pressure data self-acquisition and synchronous trigger pressure data acquisition. Data acquisition method; in order to prevent signal interference and solve the problem of signal distortion caused by many measuring points, long distances and too long signal transmission wires in the test field, a multi-signal synchronous trigger is used, and a synchronous trigger network is built to cooperate with pressure signal acquisition equipment and devices, established a synchronous trigger data acquisition system; realized remote signal control, shortened the length of signal transmission wires, and improved the stability and accuracy of signal transmission

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