Enhancing Open National Combustion Code and Application of Energy Efficient Engine Combustor

Abstract

This paper presents a recent enhancement of the Open National Combustion Code (OpenNCC) and applies it to model a realistic combustor configuration, Energy Efficient Engine ( $E^3$ ). First, a series of validation tests for the newly implemented advection upstream splitting method (AUSM) and the extended version of the AUSM-family schemes ( ${\mathrm{AUSM}}^{+}$ -up) is performed. In comparison with the analytical/experimental data of the validation tests, good agreement is achieved. For steady-state $E^3$ cold flow results using the Reynolds-averaged Navier–Stokes, first a grid sensitivity analysis is conducted and then a detailed comparison among the flow fields by two different numerical schemes, the standard Jameson–Schmidt–Turkel scheme and the AUSM scheme, is performed. The main differences are that the AUSM scheme is less numerically dissipative and it predicts a much stronger reverse flow in the recirculation zone.