Enhancement of the Open National Combustor Code (Open NCC) and Initial Simulation of Energy Efficient Engine

Computational Study of Combustor–Turbine Interactions

“…Unlike the u-velocity and v-velocity profiles, the w-velocity profile looks more chaotic. This is in fact encouraging since our twenty-four degrees of the combustor geometry seems to capture the strong circumferential flow motions (Note that in our previous study using the twelve degrees geometry, 24 we found that the circumferential variation in the flow structures is small). In the TKE profile ( Fig.…”

“…It is a state-of-the-art code equipped with a comprehensive combustion model, a turbulence model (cubic non-linear k − model with the wall function), finite rate chemistry with turbulence chemistry interaction models, PDF transport model, 13 Eddy-Breakup Model (EBU) 14 and Linear-Eddy Model (LEM), 15,16 and spray model (Lagrangian liquid phase model). 17,18 Many previous papers and presentations (e.g., 4,[19][20][21][22][23][24] have shown that OpenNCC (as well as NCC) has facilitated the combustion CFD in the development/design of the combustion technology at NASA-GRC. For the numerical and mesh capability, OpenNCC is designed for unstructured grids (i.e., any mix of three-dimensional elements: hexahedral and tetrahedral mesh), and massively parallel computing (with almost perfectly linear scalability is achieved for non-spray cases up to 4000 central processing units).…”