Chinese Journal of Theoretical and Applied Mechani ›› 2006, Vol. 38 ›› Issue (3): 296-301.DOI: 10.6052/0459-1879-2006-3-2004-390

• Research paper • Previous Articles     Next Articles

Numerical investigations on propagation of spherically imploding gas

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  1. 北京8009信箱26分箱北京九所
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-25 Published:2006-05-25

Abstract: This paper reports numerical simulations of the propagation of spherically imploding detonations in H$_{2}$/O$_{2}$ mixture. One-dimensional Euler equations in spherical coordinates were solved with the dispersion controlled dissipative (DCD) scheme, coupled to an elementary chemical reaction model. The pressure and temperature behind the detonation wave were traced to show their change tendency. Its dependency on the geometrical size and initial conditions were also numerically examined. It is found that the variation of front pressure is representable in terms of approximate functions of $r/R$ only outside the central zone. Linear relations exist between the front and initial pressure. The front temperature increases much slower than the pressure during implosion.

Key words: gas detonation,spherically imploding,overdriven,elementary reaction model,dispersion controlled dissipative scheme