| Detonation around blunt-body in elevated temperature premixed supersonic is chosen to be researched in this dissertation. The air-heater used to supply elevated temperature supersonic mixture of H2 and O2 is characteristic, and the experiment of the detonation around blunt-body is the keystone in this research. Based on the experiment, a computational analysis of detonation around the blunt-body whose radius is different from each other is given.Firstly detonation around blunt-body is achieved by used the characteristic elevated temperature premixed supersonic air-heater which . And an analysis is given by comparing the picture took in experiment with detonation theory. The result that detonation can be made around blunt-body at lower Mach number in high-temperature premixed supersonic gas.Secondly the higher the equivalent concentration of H2 in the elevated temperature premixed supersonic gas is, the faster detonation spreads away. When the equivalent concentration of H2 is low, the deflagration detonation transition is come out (DDT). When the equivalent concentration of H2 is some value, then the stabilized detonation can be reached. When the equivalent concentration of H2 is high, the detonation wave will move away from blunt-body, and then return back because of lack of energy.Thirdly computational simulation is used to analysis the problem that state of detonation is changing from sub-detonation to super-detonation when the radius of blunt-body is added. In this part, several chemistry models are summed up, and then a conformable computational model is selected to solve this problem by validate of a classical experiment.Finally some useful viewpoints are given to the further research of detonation, and foreground of detonation as a way of combustion which can be used in supersonic scramjet is discussed. And then several ways to solve the problems which come out from the experiments, these advices can make the experiments get better results.
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