Experimental study and numerical simulation of cellular structures and Mach reflection of gaseous detonation waves
In this paper the Deflagration to Detonation Transition (DDT) process of gaseous H2−O2 mixture and Mach reflection of gaseous detonation wave on a wedge have been conducted experimentally. The cellular pattern of DDT process and Mach reflection were obtained from experiments with wedge angle я= 10° ∼ 40° and initial pressure of gaseous mixture 16kPa ∼ 26.7kPa. The 2-D numerical simulations of DDT process and Mach reflection of detonation wave were performed by using the simplified ZND model and improved space-time conservation element and solution element (CE/SE) method. The numerical cellular structures were compared with the cellular patterns of soot track. Compared results were shown that it is satisfactory. The characteristic comparisons on Mach reflection of air shock wave and detonation wave were carried also out and their differences were given.
KeywordsCellular Structure Detonation Wave Solution Element Initial Pressure Wedge Angle
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