Numerical and theoretical studies on detonation initiation by a supersonic projectile

Yiguang Ju, Goro Masuya, Akihiro Sasoh

Research output: Contribution to journalConference articlepeer-review

15 Scopus citations


Conditions of detonation initiation induced by a supersonic sphere in a stoichiometric hydrogen/oxygen mixture with 70% argon dilution are investigated numerically and theoretically. Transitions of the two extremes, shock-induced combustion and detonation initiation, are examined over pressures ranging between 0.2 and 10 bar. Numerical results show a very distinct detonation initiation boundary that separates the detonatable and undetonatable regions. A good agreement is shown through the comparison of the numerical results with the recent experimental data. Additionally, a theoretical investigation on the determination of detonation initiation boundary is carried out by introducing a concept of the kinetic limit. The kinetic limit is defined by the ignition Damköhler number. A joint theory for the determination of the detonation initiation boundary is presented by relating the present kinetic limit defined by the unity ignition Damköhler number with the energy limit given by Lee. Comparison between the theory and the experiment over a wide pressure range shows that the detonation initiation boundary can be well defined by the present joint theory.

Original languageEnglish (US)
Pages (from-to)2225-2231
Number of pages7
JournalSymposium (International) on Combustion
Issue number2
StatePublished - 1998
Event27th International Symposium on Combustion - Boulder, CO, United States
Duration: Aug 2 1998Aug 7 1998

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes


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