Linear theory for the interaction of small-scale turbulence with overdriven detonation Articles uri icon

publication date

  • November 2014

start page

  • 116101

end page

  • 116118

issue

  • 11

volume

  • 26

international standard serial number (ISSN)

  • 1070-6631

electronic international standard serial number (EISSN)

  • 1089-7666

abstract

  • To complement our previous analysis of interactions of large-scale turbulence with strong detonations, the corresponding theory of interactions of small-scale turbulence is presented here. Focusing most directly on the results of greatest interest, the ultimate long-time effects of high-frequency vortical and entropic disturbances on the burnt-gas flow, a normal-mode analysis is selected here, rather than the Laplace-transform approach. The interaction of the planar detonation with a monochromatic pattern of perturbations is addressed first, and then a Fourier superposition for two-dimensional and three-dimensional isotropic turbulent fields is employed to provide integral formulas for the amplification of the kinetic energy, enstrophy, and density fluctuations. Effects of the propagation Mach number and of the chemical heat release and the chemical reaction rate are identified, as well as the similarities and differences from the previous result for the thin-detonation (fast-reaction) limit.

keywords

  • ; mach numbers; vortex dynamics; shock wave effects; speed of sound; acoustic distortion