Analysis and modeling of turbulence amplification across a shock wave
- Funding Agency: Aeronautical Research & Development Board
- Project Summary: Reynolds-averaged Navier-Stokes (RANS) simulations can yield significant
error when applied to the interaction of turbulence with shock waves. This is often due to the fact
that RANS turbulence models do not account for the underlying physical phenomena correctly. In
high-speed flow applications dominated by shock waves, CFD predictions using standard
two-equation models with compressibility correction do not match experimental measurements.
We use the interaction of homogeneous isotropic turbulence with a normal shock to suggest
improvements to RANS turbulence models. Specifically, we use linearized governing equations
to study the evolution of vorticity and temperature fluctuations across a shock. Dominant physical
processes contributing to the amplification of these quantities are identified. New models are
proposed and applied to canonical configurations of shock-boundary layer interaction
- Total Project outlay: Rs. 20.745 lakhs
- Duration and year of initiation: Three years. 2012.