| Citation: | YIN Yu, YANG Tianwei, ZHOU Hua, et al. Efficient spray combustion simulations using the characteristic timescale model[J]. Journal of Aerospace Power, 2023, 38（1）：104-115 doi: 10.13224/j.cnki.jasp.20210366
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The characteristic time scale (CTS) model was investigated for efficient and robust spray combustion simulations. This model was demonstrated in steady-state simulations of spray flames in an aero-engine model combustor, and the predicted temperature and species results were compared with those from the finite-rate combustion model to verify the feasibility of the CTS model in spray combustion. Combined with a dimension reduction method, the CTS model can be used to facilitate the finite-rate based calculations with full chemical kinetics by providing good initial conditions. The accelerating effect was investigated. Results showed that for the CFM56 model combustor considered, CTS yielded a realistic flame shape and reasonably predicted species distributions. The in situ adaptive tabulation (ISAT) approach reduced the calculation time by 90%. The convergence time of steady-state simulations with initialization based on the CTS model was reduced by 35% and then reduced by 40% if combined with the dimension reduction method. Hence, the proposed characteristic timescale model was valuable in providing good initial conditions for finite-rate based combustion models and in improving the efficiency and robustness of spray combustion simulations.
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