Method for counting propagation velocity of pipeline gas explosion flame

Abstract

The invention discloses a method for counting the propagation velocity pipeline gas explosion flame, comprising the steps: installing a high-speed photographic device at a gas explosion pipeline visual window; rapidly shooting gas explosion flame according to a certain frequency; analyzing and processing shot image to obtain related coefficients that the image corresponds to practical size; respectively cutting down two adjoining images according to longitudinal pictures corresponding to the unit length of horizontal axis from two directions to obtain the related coefficients of the two cut images; counting flame move distance according to the cutting length corresponding to the maximum related coefficient; and counting the propagation velocity of the gas explosion flame after converting the flame move distance to the practical size. The method can count the propagation velocity of the front gas explosion flame, count the propagation velocity of the flame that fills with a whole pipeline, and count the positive velocity and the opposite velocity of the explosion flame, and is suitable for counting the propagation velocity of the explosion flame of solids in the pipeline, such as dust, explosive, etc.

Description

technical field [0001] The invention relates to a method for calculating the flame propagation velocity of a gas explosion, which belongs to the technical field of combustion explosion and safety, in particular to a method for calculating the flame propagation velocity of a pipeline gas explosion by using high-speed photographic images. Background technique [0002] Coal is an important basic industry in my country. For a long time, coal has accounted for more than 2 / 3 of my country's primary energy production and consumption, but the safety situation of coal mines is severe. More than 95% of my country's coal is mined underground. Due to the complex and changeable geological conditions of coal occurrence, the gas content in coal seams is generally high. More than 30% of the mines currently mined are high-gas mines. Since the founding of the People's Republic of China, there have been 23 accidents that killed more than 100 people at one time, of which 21 were gas (or gas and...

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Problems solved by technology

[0005] At present, the laboratory pipeline explosion experiment system often uses the flame velocity measurement system to measure the flame propagation velocity when studying the dynamic changes of the gas explosion flame. The flame velocity measurement system adopts the photoelectric conversion method, and multiple photoelectric probes are arranged along the experimental pipeline. What is measured is the average speed of flame front propagation between two adjacent probes, and the law of flame propagation cannot be quantified

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