Evolution of Autocorrelation in Detonation Interaction with Homogeneous, Isotropic Turbulence

  • F. K. Lu
  • M. Chauhan
  • L. Massa
Conference paper


Detonation-turbulence interaction (DTI) differs from shock-turbulence interaction (STI) due to exothermicity, and the presence of a detonation lengthscale, intrinsic fluctuations of the unstable detonation front and a self-excited unstable region which supports intrinsic time scales. Downstream of the wavefront, a global instability exists due to self-excited acoustic coupling. Linear analysis found selective wave amplification that depends on both the turbulence lengthscale and the half-reaction distance [4]. A subsequent DNS found that the preshock perturbations strongly affect the postshock statistics [3]. This paper examines the evolution of the autocorrelation of the longitudinal velocity fluctuations for STI and DTI, some of which have been presented in [3]. Local homogeneity and isotropy are assumed.


Detonation Wave Isotropic Turbulence WENO Scheme Global Instability Detonation Wave Front 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • F. K. Lu
    • 1
  • M. Chauhan
    • 1
  • L. Massa
    • 1
  1. 1.Aerodynamics Research Center, Mechanical and Aerospace Engineering DepartmentUniversity of Texas at ArlingtonArlingtonUSA

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