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research-article

Effects of Effusion and Film Cooling Jet Momenta on Combustor Flow Fields

[+] Author and Article Information
Briones Alejandro

University of Dayton Research Institute, 300 College Park, Dayton, OH 45469-0043
alejandro.briones@udri.udayton.edu

Stouffer Scott D.

University of Dayton Research Institute, 300 College Park, Dayton, OH 45469-0043
scott.stouffer.ctr@us.af.mil

Vogiatzis Konstantino

Engility/PETTT, Air Force Research Laboratory, AFRL/RC Bldg. 676, 2435 Fifth St., Wright-Patterson AFB, OH 45433
konstantin.vogiatzis@engilitycorp.com

Rein Keith

Spectral Energies, LLC, 5100 Springfield Street, Suite 301, Dayton, OH 45431
keith.rein.ctr@us.af.mil

Rankin Brent

Air Force Research Laboratory, 1790 Loop Rd. N., Wright-Patterson AFB, OH 45433
brent.rankin.1@us.af.mil

1Corresponding author.

ASME doi:10.1115/1.4039178 History: Received February 01, 2017; Revised October 13, 2017

Abstract

The effects of effusion and film cooling momenta on combustor flow fields are investigated. Steady, compressible three-dimensional simulations are performed on a single-swirler combustor using Reynolds-averaged Navier-Stokes (RANS) with flamelet generated manifold (FGM) and Lagrangian-Eulerian multiphase spray, while accounting for dome and liner cooling. Two simulations are performed on the same mesh. One simulation is conducted using a parallelized, automated, predictive, imprint cooling (PAPRICO) model with dynamic flux boundary conditions and downstream pressure probing (DFBC-DPP). PAPRICO involves removing the cooling jet geometry from the dome and liner while retaining the cooling hole imprints. The PAPRICO model does not require a priori knowledge of the cooling flow rates through various combustor liner regions nor specific mesh partitioning. The other simulation is conducted using the homogenously patched cooling (HPC) model, which involves removing all the cooling jets. The HPC model applies volumetric sources adjacent to the combustor wall regions where cooling jets are present. The momentum source, however, becomes negligible. The HPC model is not predictive and requires tedious ex situ mass flow measurements from an auxiliary flowbench experiment, afflicted with systematic errors. Hence, the actual in situ air flow splits through the several combustor regions is not known with absolute certainty. The numerical results are compared with measurements of mass flow rates, static pressure drops, and path-integrated temperatures. The results demonstrate that it is critical to account for the discrete dome and liner cooling momentum to better emulate the reacting flow in a combustor.

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