Experiment-Based Modeling of Turbulent Flames with Inhomogeneous Inlets
Experiment-Based Modeling of Turbulent Flames with Inhomogeneous Inlets
复制标题
基于实验的不均匀入口湍流火焰建模
DOI:
10.1007/s10494-021-00304-8
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Masri, Assaad R.
中科院分区:
文献类型:
--
作者:
Ranade, Rishikesh;Echekki, Tarek;Masri, Assaad R.
An experiment-based closure framework for turbulent combustion modeling is further validated using the Sydney piloted turbulent partially premixed flames with inhomogeneous inlets. The flames are characterized by the presence of mixed mode combustion. The framework’s closure is “trained” on multi-scalar measurements to construct thermo-chemical scalar statistics parameterized in terms of principal components (PCs). Three flame conditions are used for this training, while an additional flame is used for validation. The results show that the leading PCs exhibit complex features near the jet inlet where effects of partial premixing and the presence of different burning modes are strong. These features may not be captured through a strict definition for the mixture fraction or measures of reaction progress. Further downstream, the first 2 PCs tend to be reasonably correlated with parameters that are characteristic of nonpremixed flames, including the mixture fraction and the progress variable. Comparisons of the model predictions for unconditional mean and RMS for the measured quantities show a very good qualitative and quantitative agreement with experimental statistics for all 4 flames using the same closure for the PCs governing equations.
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