Explosive test device of combustible gas with concentration gradient and using method

Abstract

The invention provides an explosive test device of combustible gas with the concentration gradient and a using method. The using method comprises the steps that vacuumizing is conducted till the interior of an explosive reaction container is at the vacuum state; negative pressure is matched with the gradient concentration, specifically, the combustible gas with the different concentrations is allocated in an upper reaction container and a lower reaction container, the pressure balance between the upper reaction container and the lower reaction container is always maintained in the gas injection process by controlling the flux speed electrically; an ignition test is conducted, specifically, an air cylinder is pulled out from a separation plate port, so that the upper reaction container andthe lower reaction container are communicated with each other, meanwhile, the ignition test is started, in the ignition process, a high-speed photography and schlieren measuring system analyzes the parameters such as the maximum explosive pressure, the maximum pressure rise speed, the explosive wave transmission rate, the flow field morphology, the flame evolution and the like to do research on the explosive transmission mechanism of the combustible gas with the concentration gradient and analyzes the evolution dynamics process of explosive. The explosive test device has the effects of being used for doing research on the explosive evolution dynamics process and explosive wave transmission mechanism of the combustible gas with the concentration gradient.

Description

technical field [0001] The invention provides a combustible gas explosion experiment device with a concentration gradient and a use method thereof. The device and method can realize the configuration of the combustible gas with the concentration gradient and implement the simulation experiment of the combustible gas explosion with the concentration gradient. Background technique [0002] Combustible gas fire and explosion accidents are common disaster types in petrochemical and other industrial fire and explosion accidents. The evolution law of combustible gas explosion accidents and the establishment of related mathematical models are hot spots in the research of industrial fire and explosion prevention technology. In the initial studies on gas explosions in confined spaces, the gas in the space is often assumed to be a homogeneous gas in which combustible gases and oxygen are fully mixed. However, many researchers believe that in actual gas explosion accidents, combustible...

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Problems solved by technology

However, many researchers believe that in actual gas explosion accidents, combustible gas and oxygen may not be completely mixed when the explosion occurs, so there is a concentration gradient of combustible gas in the confined space

Studies have shown that the explosive characteristics of combustible gases with concentration gradients are significantly different from those of combustible gases with uniform concentrations. At the same time, it has been shown that the typical theories and criteria in uniform combustible gas environments are not applicable in combustible gas environments with concentration gradients. In terms of research on combustible gas explosions with concentration gradients, previous studies mainly focus on pipes or narrow and long channels, and there are few studies on the approximate space of length, width and height.

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