Development of a Large-Eddy Simulation Solver for Turbulent Combustion Using Flamelet Approaches Based on Open-Source Frameworks

Abstract

Turbulent combustion is a primary phenomena determining the performance of practical applications such as furnace, disel engines, gas turbine engines, and many aerospace devices include rockets. For developing high-performance devices, understanding flame characteristics of turbulent combustion in a de- vice is required, typically in a respect of combustion efficiency, stability, and pollutant emissions. With a development of turbulent schemes, called large eddy simulation (LES), with dynamic subgrid models and the rapid advances in computer technology, the significant progress on computational research for turbulent combustion has been achieved in recent decades. Especially, LES with flamelet approach has been found as a one of adaptive options for device-scale simulations due to its significant reduction of computational cost and feasibil- ity to implement as an extension to conventional codes for non-reacting flows. In this study, LES solver using flamelet combustion models (steady laminar flamelet model (SLFM) and flamelet progress variable approach (FPVA)) is developed on open-source frameworks. For the code development, related theo- ries on combustion and turbulent models are reviewed first. Detail descriptions of the developed codes are presented from the flamelet generation process to the LES solver. Finally, validation of the new solver is conducted with the partially premixed jet flame (Sandia D). The generated flamelet library and LES results show good agreement with the experimental data.