Abstract.
Critical conditions for onset of detonations are compared at (1) two significantly different scales, (2) for a range of \(\rm H_2\)-air mixtures diluted with C\(\rm O_2\), \(\rm H_2\)O, and (3) for two types of geometry – one a long obstructed channel and the other a room with a relatively small aspect ratios. For the range of scales, mixtures, and initial conditions tested, the detonation cell size \(\lambda\) was shown to be a reliable scaling parameter for characterization of detonation onset conditions. An experimental correlation is suggested for the critical detonation onset conditions. This correlation is based on a wide variety of available experimental data on DDT in mixtures of hydrogen and hydrocarbon fuels with air and on the use of detonation cell size \(\lambda\) as a scaling parameter characterizing the mixture.
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Received 14 November 1999 / Accepted 16 February 2000
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Dorofeev, S., Sidorov, V., Kuznetsov, M. et al. Effect of scale on the onset of detonations. Shock Waves 10, 137–149 (2000). https://doi.org/10.1007/s001930050187
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DOI: https://doi.org/10.1007/s001930050187