TY - GEN A1 - Starick, Tommy A1 - Schmidt, Heiko T1 - Numerical investigation of a lifted methane/air jet flame using stochastic map-based turbulence modeling T2 - Proceedings of the Conference on Modelling Fluid Flow CMFF’25 N2 - This numerical study investigates a lifted methane/air jet flame in a vitiated coflow by means of the map-based, stochastic one-dimensional turbulence (ODT) model. The dimensional reduction of ODT allows for simulations with affordable computational costs and provides nonetheless full-scale resolution along a notional line of sight crossing the turbulent flow field. The considered Cabra burner configuration consists of a jet flame issuing from a central nozzle into a vitiated coflow of hot combustion products. Radial and centerline profiles for mixture fraction, temperature and selected species mass fractions obtained from ODT using a reduced and detailed reaction mechanism are in appropriate agreement with the existing experimental measurements. A two-dimensional illustration of the autoignition index is given, which enables the distinction between autoignition and propagation driven reaction zones. Additionally, the sensitivity of the jet combustion to velocity and temperature variations is investigated. Considering the reduced order of ODT and the sensitivity of the subtle interactions of the hot coflow with the cold jet on the entire reaction process, ODT is able to predict the flow characteristics and reasonably matches the experimental data. As a consequence, ODT is an efficient and alternative model for turbulent reactive flow simulations. KW - Autoigniton KW - Lifted jet flame KW - Methane/air combustion KW - ODT KW - One-dimensional turbulence KW - Stochastic turbulence modeling Y1 - 2025 UR - https://www.cmff.hu/papers25/CMFF25_Final_Paper_PDF_63.pdf SN - 978-615-112-002-6 SP - 1 EP - 8 PB - Department of Fluid Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics CY - Budapest ER -