A simplified 2D axisymmetric computational fluid dynamics simulation of oxy-coal combustion is performed to address the influence of swirl strength and the combustion environment on the flow field and combustion characteristics. A quantitative analysis of the internal recirculation zone length and flame length under various operating conditions is studied by employing developed numerical models. The influence of char-CO₂ and char-H₂O gasification reactions on the species consumption and temperature profile is also studied through numerical modelling. The swirl strength considerably influences both the flow field and temperature profile inside the furnace. At higher swirl strength, radially dispersed shorter flames are obtained due to spreading of the secondary stream. Results showed that the flame shifted towards the burner at higher oxygen content due to rapid devolatilisation at higher flame temperature. The ignition of pulverised coal particles is enhanced at higher oxygen concentration due to increased stoichiometry near the burner. Oxy-35% O₂ has 300 K higher flame temperature than oxy-21% O₂. Endothermic gasification reactions significantly influence the temperature profile in the furnace. CO₂-char gasification reaction has a more pronounced influence than the H₂O-char gasification reaction. The consideration of gasification reactions has resulted in an approximately 5% reduction in peak temperature.

为了解决旋流强度和燃烧环境对流场和燃烧特性的影响，进行了氧煤燃烧的简化二维轴对称计算流体动力学模拟。通过使用已开发的数值模型，研究了内部循环区长度和火焰长度在各种工况下的定量分析。char-CO ₂和char-H _2的影响还通过数值模拟研究了气化反应对物种消耗和温度分布的影响。旋流强度显着影响炉内的流场和温度曲线。在较高的旋流强度下，由于二次流的扩散，获得了径向分散的较短火焰。结果表明，由于在较高的火焰温度下快速脱挥发分，火焰在较高的氧气含量下向燃烧器移动。由于燃烧器附近的化学计量增加，在较高的氧气浓度下，粉煤颗粒的着火性增强。氧35％O _2的火焰温度比氧21％O ₂高300K 。吸热气化反应显着影响炉中的温度曲线。一氧化碳₂炭气化反应比H ₂ O炭气化反应具有更显着的影响。考虑气化反应导致峰值温度降低约5％。