Test device for dust explosion experiment

Abstract

The invention discloses a test device for a dust explosion experiment. An explosion cavity is provided with photoscopes; focusing streak systems are arranged on both sides of the explosion cavity; the explosion flow field of a test zone in the explosion cavity is shot; light rays emitted from the light source are converted to be divergent light beams through a slot device; the divergent light beams are projected through a first reflecting mirror onto a first paraboloid mirror to be parallel light beams; the parallel light beams are projected on a second paraboloid mirror after penetrating through the first photoscope, the test zone and the second photoscope, and are converted to be convergent light beams through a second paraboloid mirror; and the convergent light beams are projected to a second reflecting mirror and reaches a digital imaging device through a blade system. The flow field structure for the dust explosion experiment inside the cavity can be observed through the photoscopes arranged on the explosion cavity, the first photoscope and the second photoscope symmetrically arranged ensure that light rays from the focusing streak system can pass through the test zone in the middle, and the dust explosion flow field image inside the test zone is projected onto a high-speed digital imaging device and recorded for study.

Description

technical field [0001] The invention belongs to an experimental testing device, in particular to a dust explosion experimental testing device capable of capturing the combustion state and process of a single particle in a dust cloud, and clearly reproducing the internal flow field structure and changes of a dust explosion flame through high-speed photography and high-speed schlieren images . Background technique [0002] The structure of the existing commonly used explosion experiment test device mainly consists of five parts: the main body of the airtight device, the gas distribution and powder exhaust system, the ignition system, the experimental data acquisition system, and the main control system. Most of the existing studies use this device to study the macroscopic parameters of explosion hazards and their destructive effects, such as explosion pressure and flame velocity. Few studies have been done on the flame propagation characteristics in the early stage of explosi...

AI Technical Summary

Problems solved by technology

[0003] At present, the internationally used 20L spherical explosion test device and other explosion test devices cannot reflect the flow field information of the local area of ​​the explosion flame flow field (a certain flow field section), and cannot effectively display the three-dimensional flow and other complex flow fields. As a result, it is impossible to conduct an in-depth study on the dust explosion from the internal dynamic mechanism of the premixed flame acceleration propagation process, the instability characteristics of the flame propagation process, and the flame microstructure.

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