Experimental Study of the Self-Ignition Process

A target optical monitoring of the gas-dynamic heat supply to the reactive medium that is strictly synchronized with the blast process is of inestimable importance for the aforementioned cases. There, the spatial location and displacement of the explosive front (pressure shocks) or contact (non-impact discontinuity of the temperature and density) surfaces are of great interest [83]. 

Therefore, it is possible to observe the spatial orientation and displacement of the heat release fronts (combustion, deflagration, detonation) and their reciprocal transformation (deflagration/detonation transition, detonation quenching). It is important to find an answer to the question what optical recording systems and in what combination with the known ways of measurements are applicable for solving the assigned problems  

All phenomena of explosive, combustion and detonation are transient and accompanied by the generation and motion of acoustic, shock and blast waves. Therefore, for imaging shock fronts, the frame exposure time should not exceed 10 s. To describe the wave motion and the contact discontinuity displacement the frame number should be close to 10. 

Additional difficulties are caused by blast products luminescence. For most hydrocarbon mixtures powerful pulse light sources are required for combustion products translucence. 

Among the known high-speed photo-recording systems the following systems meet the speed and on-off time ratio requirements  

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