Research on microscopic testing technology for key parameters in gas detonation flow fields
LI Wanhong
ZHANG Chunli
Abstract：In order to study the deflagration characteristics of gas/air premixed gases in coal mines,especially to obtain microscopic flow field information of shock waves and flames,and to study the mechanism of the in-hibitory effect of inert flame retardants.The modular approach is adopted to construct a mesoscale shock tube experimental testing system,which includes a shock tube,a pressure relief chamber,a vacuum system,an igni-tion system,a synchronous control system,an optical display system,and a pressure flame testing system.Its main features include:integrating a delay system and a synchronous control system,focusing on the microscopic information of the gas/air premixed gas detonation flow field;Propose the concept of pre mixing outside the tank,independently using charging and pre mixing gas preparation systems,which can accurately control the composition and initial pressure of the pre mixed gas;Use BOPP membrane to separate the experimental section from the pressure relief chamber,ensuring experimental safety.The experimental results show that the shock tube testing system constructed in this paper can not only obtain information from multiple single point sources,but also obtain multiple structural information within the premixed gas detonation flow field,laying the foundation for the study of the ignition mechanism of premixed gas detonation,the acceleration mechanism of flames,the coupling process of flames and shock waves,and the feedback effect.
Keywords：gas explosionshock tubelaser schlierensynchronous controlhigh speed photography
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 107-112 )