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Modeling of Internal Reacting flows and External Static Stall Flows Using RANS and PRNS

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.1240
pages 585-588

Tsan-Hsing Shih
ICOMP/Ohio Aerospace Institute, NASA GRC, Cleveland, OH, USA

Nan-Suey Liu
NASA Glenn Research Center, Cleveland, Ohio 44135,USA

Abstract

The reacting flow in a research Lean Direct Injection (LDI) hydrogen combustor and the static stall of NACA0012 airfoil were simulated using both Reynolds averaged Navier-Stokes (RANS) and partially resolved numerical simulation (PRNS) approaches. The concept and the main features of the PRNS approach are briefly described. The governing equations are grid independent; the subscale models are the dynamic equation system. We consider PRNS as an engineering tool for the very large eddy simulation of complex turbulent flows. Two CFD codes, NCC and Wind-US, with two different subscale models (two and one transport equation models, respectively) are used in the current PRNS approach. Based on the comparisons with available experimental data, the numerical results indicate that the advanced PRNS subscale models seem to be able to capture important large scale turbulent structures and to improve the quality of numerical simulations while keeping a relatively low cost comparable to the unsteady RANS simulations.

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