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发表时间：2022-10-06

发表刊物：大连理工大学学报

期号：1

页面范围：37-42

ISSN号：1000-8608

摘要：Based on the theory of fluid dynamics and combustion , the mathematical model of gas explosion in the pipe with diameter of 500 mm is established ,by Fluent ,numerical simulation study of the flame′s quenching process in inert gas is conducted by using the finite rate combustion model , and the characteristics of explosion field by injecting different flow rate of high pressure and low temperature CO2 are also investigated .T he experimental results show that ,w hen the CO2 injection is less than 12 kg/s ,it can not extinguish the flame in the pipe ;however ,when the CO2 injection is greater than 16 kg/s ,it can greatly reduce the temperature of the mixed gas ,and also dilute the methane and oxygen ,and eventually lead to the flame extinguished at the carbon dioxide entrance . The reducing process of the maximum reaction rate can be divided into three stages ,where two of the high-speed reducing stages satisfy the power-law model .When the CO2 injection is between 16 kg/s and 100 kg/s ,the extinction time reduces rapidly ,and then changes slowly ;the simulation results agree well with the experimental data .Research results can provide theoretical basis and reference for the explosion suppression in coal mine ,and also have practical significance to protect the safety of people′s lives during coal mine production .

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