An experimental device and method for the effect of convective combustion on combustion transition to detonation

Abstract

The invention relates to an experimental device and an experimental method for influence of convective combustion on deflagration to detonation transition. The experimental device comprises an ignition head, ignition powder, an initial end cover, a deflagration to detonation transition tube, a phenolic resin casing pipe, an experimental sample of an energetic material, a punching net pipe, a speedmeasurement probe, a pressure sensor, a strain gauge and a tail end cover, wherein the initial end and the tail end of the deflagration to detonation transition tube are respectively connected with the initial end cover and the tail end cover; the phenolic resin casing pipe is positioned in the deflagration to detonation transition tube and is in clearance fit with the deflagration to detonationtransition tube; the punching net pipe is arranged on the tail end cover by a stepped hole in the tail end cover and is used for forming convective combustion and controlling the intensity of the convective combustion; an experimental sample is putted into the phenolic resin casing pipe and the punching net pipe can be putted into the experimental sample; the pressure sensor and the speed measurement probe are inserted into the experimental sample through pressure measurement holes in the deflagration to detonation transition tube and speed measurement holes in the phenolic resin casing pipe;the strain gauge is arranged between two adjacent pressure measurement holes of the deflagration to detonation transition tube.

Description

technical field [0001] The invention relates to a combustion-to-detonation experimental device and method, which are used for experiments on the influence of convective combustion on combustion-to-detonation, and belong to the technical field of evaluating the safety of energetic materials. Background technique [0002] The degree of difficulty in transitioning from combustion to detonation of energetic materials is an important indicator for evaluating the safety of energetic materials, and is particularly important for the production, use, storage, safety analysis, and setting of corresponding safety measures of energetic materials. For energetic materials with a certain porosity, the combustion-to-detonation process includes ignition surface combustion, conduction combustion, convective combustion, compression combustion, shock wave formation, compression combustion under the action of shock waves, and detonation formation. The literature "Burning to Detonation Transition...

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Problems solved by technology

[0004] Although the above-mentioned devices have their own strengths in the study of combustion-to-detonation mechanism and influencing factors, they cannot carry out simulation experiments and quantitative evaluations of the influence of convective combustion on combustion-to-detonation mechanism.

With the in-depth understanding of the combustion-to-detonation mechanism of energetic materials, the original device cannot be used to quantitatively evaluate the influence and effect of convective combustion on the combustion-to-detonation process, and it is impossible to conduct more in-depth research on the combustion-to-detonation mechanism and process

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