Modelling of particle-turbulence-chemistry interaction for oxy-fuel processes (B06)

这个子项目的总体目标是开发一致的模型和方法来描述湍流、化学和颗粒之间的相互作用，考虑到煤转化过程的不同方面。通过高维FGM化学制表实现了颗粒与气相燃烧的配方。考虑了非绝热物理和有限速率化学的影响，以及占挥发物和碳的两个混合分数。此外，还首次介绍了由脱挥发过程的进程变量决定的脱挥发产物的变化。在下一个时期内，将开发一种基于现场的运输fdf方法。它将允许开发的Flamelet模型的高维性以及与分散阶段的相互作用。通过添加生物质来扩展燃料谱会影响模型的各个方面，并将不断加以阐述和实施。除了广泛燃料谱的焦炭转化和热解动力学外，还将包括描述颗粒随机破裂和分解的颗粒破碎模型。不同子模型的验证将通过与实验观测的比较来进行。

The overall aim of this subproject is the development of consistent models and methods for describing the interaction between turbulence, chemistry and particles, which take into account different aspects of the coal conversion process. This formulation of the particle and the gas phase combustion is realized by high-dimensional FGM chemistry tabulation. Effects of non-adiabatic physics and finite rate chemistry are considered as well as two mixture fractions accounting for volatiles and char. Furthermore, a variation of the devolatilization products, determined by a progress variable for the devolatilization process, is introduced for the first time. Within the next period a field-based transported FDF-method will be developed. It will allow for the high dimensionality of the developed Flamelet model as well as for the interaction with the dispersed phase. The extension of the fuel spectrum by adding biomass impacts various aspects of the models and will be consistently elaborated and implemented. Besides kinetics of char conversion and pyrolysis of a broad fuel spectrum a particle fragmentation model, which describes the stochastic bursting and decomposing of particles, will be included into the models. Validation of the diverse sub-models will be carried out by comparisons to experimental observations.