Numerical investigations on propagation of spherically imploding gas
球面聚心气相爆轰波传播过程的数值研究

This paper reports numerical simulations of the propagation of spherically imploding detonations in H2/O2 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.