An inclined jet in crossflow, characteristic of film cooling applications is studied with highly resolved LES. The configuration reproduces an experimental set-up in which three dimensional measurements of mean velocity and mean flow concentration have been performed using MRV/MRC completed with PIV measurements at some specific locations. The simulations are shown to capture with high fidelity both the separated flow inside the film cooling hole and the distribution of scalar concentration downstream of injection. This paper focuses on the gradient-diffusion hypothesis for the scalar fluxes in RANS modeling. In this configuration we show a large misalignment between turbulent scalar fluxes and the scalar concentration gradient in the streamwise direction.
|Original language||English (US)|
|Title of host publication||International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013|
|State||Published - 2013|
|Event||8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013 - Poitiers, France|
Duration: Aug 28 2013 → Aug 30 2013
|Name||International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013|
|Other||8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013|
|Period||8/28/13 → 8/30/13|
Bibliographical noteFunding Information:
Dr. Coletti was supported by a grant from Honey-well Corp. Computations have been performed on the Vulcan IBM Blue Gene/Q system at Lawrence Livermore National Laboratory, funded by the Advanced Simulation and Computing (ASC) Program of the National Nuclear Security Administration (NNSA). Access to Vulcan clusters was provided through the Predictive Science Academic Alliance Program (PSAAP) and is greatly acknowledged.