Modular hydrogen explosion experiment research system and method with circulation loop

Abstract

The invention discloses a modular hydrogen burning explosion experiment research system with a circulation loop and a method. The system comprises a cylindrical test body and a data measurement subsystem, wherein the test body comprises a plurality of modular pressure-bearing cylinders, and the modular pressure-bearing cylinders are sequentially connected in series and communicated; a plurality ofmeasuring points are arranged in each modular pressure-bearing cylinder, and each measuring point is electrically connected with the data measuring subsystem; an ignition device is arranged at one end in the test body; a plurality of annular pore plate turbulent flow arrays are arranged in each modular pressure-bearing cylinder; the device further comprises a gas injection subsystem, a vacuumizing subsystem and a gas circulation subsystem, the gas injection subsystem is communicated with one side of the test body, and the other side of the test body is communicated with the vacuumizing subsystem; and the gas circulation subsystem is communicated with the test body to form a gas closed circulation loop. The system has the characteristics of modular design characteristics, simple assembly and high flame combustion speed measurement precision.

Description

technical field [0001] The invention relates to the technical field of hydrogen explosion experiments in severe accidents of pressurized water reactors, in particular to a modular hydrogen explosion experiment research system and method equipped with a circulation loop. Background technique [0002] Under severe accident conditions, hydrogen enters the containment vessel and mixes with air to form a flammable mixture, which will detonate under certain conditions, and the resulting pressure load will directly threaten the structural integrity of the containment vessel. Currently adopted hydrogen recombiner, igniter and other measures can reduce the volume and duration of combustible gas clouds, but the possibility of flame acceleration in the combustion process cannot be ruled out. In the Three Mile Island and Fukushima accidents, the hydrogen mixture in the containment exploded, and the pressure shock wave generated caused serious damage to the integrity of the containment a...

AI Technical Summary

Problems solved by technology

Currently adopted hydrogen recombiner, igniter and other measures can reduce the volume and duration of combustible gas clouds, but cannot rule out the possibility of flame acceleration in the combustion process

In the Three Mile Island and Fukushima accidents, the hydrogen mixture in the containment exploded, and the pressure shock wave generated caused serious damage to the integrity of the containment and its internal structures.

[0003] At present, a series of combustion analysis tools developed by the nuclear industry are not accurate in predicting the flame propagation process. This is due to the lack of high-precision turbulent flame combustion velocity experimental data for the hydrogen flame acceleration process, which is difficult to meet the verification requirements of the flame acceleration mechanism model.

In terms of experimental research, nuclear energy research institutions in the world have established hydrogen flame acceleration experimental research devices, such as the THAI device in Germany. The device body is a cylinder with a height of about 9.0m and an inner diameter of 3.2m, and no spoiler is installed inside. , so it is only applicable to the experimental research requirements of the hydrogen slow combustion stage; for the hydrogen deflagration stage research device, such as the ENACEFF device in France, the main body of the experiment body is a vertical pipe, and the spoiler is arranged inside to enhance the air flow during the flame propagation process Disturbance, to induce the flame acceleration process, this device mainly focuses on the flame acceleration phenomenon under the condition of layered gas concentration in the height direction, rather than the flame acceleration process under the condition of uniform premixed concentration; another example is the hydrogen flame acceleration device of the University of Aachen, Germany , the experimental body adopts a horizontal tube design, equipped with a spoiler orifice inside, the barrel wall of the test body is designed with an interlayer, and a heatable fluid is injected in the interlayer, which is used for the research requirements of the premixed hydrogen flame combustion process under different initial gas temperature conditions , but the device itself is not equipped with a gas circulation loop, so it takes a long time to establish the initial gas premixing conditions

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