Unsteady Lattice Boltzmann Simulations of Corner Separation in a Compressor Cascade

Abstract Lattice Boltzmann simulations of corner separation flow in a compressor cascade are presented. The lattice approach is rather new the context turbomachinery, and configuration known to be particularly challenging for turbulence modeling. present methodology characterized by quasi-autonomous meshing strategy limited computational cost (a net ratio 5 compared previous finite-volume compressible Navier–Stokes simulation). simulation reference case (4 deg incidence) shows good agreement with experimental data concerning wall pressure distribution or losses. A description also obtained when incidence angle increased 7 deg, span-wise development separation. Subsequently, used investigate sensitivity end-wall boundary-layer thickness. thinner results smaller separation, but not complete elimination. Finally, ingredients modeling analyzed details. On one hand, curvature correction term promotes transition on blade suction side avoids spurious other addition pressure-gradient allows wider more realistic