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A Comparison of Various Models in Predicting Ignition Delay in Single-Particle Coal Combustion

机译：各种模型在单粒子煤燃烧中预测点火延迟的比较

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In this paper, individual coal particle combustion under laminar conditions was simulated using various levels of complexity in the particle and gas phase chemical kinetics. In the gas phase, detailed gas-phase chemical kinetics based on GRI3.0 and flame-sheet (infinitely-fast chemistry) are considered and compared. On the particle side, models for vaporization, devolatilization and char oxidation/gasification are considered. For devolatilization, the Kobayashi-Sarofim model and Chemical Percolation Devolatilization (CPD) models are compared. The mass, momentum and energy governing equations are fully coupled between the particle and the gas phase. Ignition delay as a metric is considered to compare the simulation prediction with experimental data. The effects of particle size, coal type and gas-phase temperature on the ignition delay are studied and compared with experimental data.
机译：本文使用颗粒和气相化学动力学中的各种复杂性模拟层状条件下的单独煤颗粒燃烧。在气相中，考虑并比较了基于GRI3.0和火焰片（无限快速的化学）的详细气相化学动力学。在粒子侧，考虑用于汽化，脱挥发化和炭氧化/气化的模型。对于脱挥发化，比较了Kobayashi-Sarofim模型和化学渗透脱挥发（CPD）模型。质量，动量和能量控制方程完全耦合在颗粒和气相之间。作为指标的点火延迟被认为是用实验数据比较模拟预测。研究了粒度，煤型和气相温度对点火延迟的影响，并与实验数据进行了比较。

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