Article

Heat and Mass Transfer and Physical Gasdynamics
2010. V. 48. № 3. P. 436–440
Gel'fand B.E., Medvedev S.P., Khomik S.V., Agafonov G.L.
Self-ignition of hydrogen-air mixtures behind reflected explosive waves
Annotation
Experimental results are given, which reveal the special features of selfignition of hydrogen-air gas mixtures behind reflected explosive pressure waves at moderate (below $1200$ K) temperature and elevated pressure. The experiments are performed in a modified shock tube which provides for generation of explosive pressure waves. The explosive waves are characterized by a jump of parameters of shock-compressed gas (pressure, temperature) at the front with their subsequent continuous decrease. This is how undesirable gas-dynamic effects are attenuated, which are due to hypothetical pre-explosion preheating of combustible mixture by compression waves. As previously, the experiments involving standard shock waves (with constant pressure/temperature levels) revealed a significant (by a factor often and more) deviation of measured values of delay of selfignition from the calculated values towards decreasing.
Article reference:
Gel'fand B.E., Medvedev S.P., Khomik S.V., Agafonov G.L. Self-ignition of hydrogen-air mixtures behind reflected explosive waves, High Temp., 2010. V. 48. № 3. P. 436