蓄热式燃烧器内等温射流流场分析

为了解高温空气燃烧机理,建立计算机仿真模型,通过试验对仿真模型的有效性进行验证后进行蓄热式燃烧器内等温射流流场分析。结果表明,空气入口高速射流是产生回流卷吸和实现高温空气燃烧的主要因素,可采用一次燃料消耗空气中大部分氧气实现低氧燃烧来降低NOx产量,二次燃料入口距离与空气入口存在最优距离且其入射角度不宜过大,仿真计算结果与实验结果一致,验证了模型可靠性。研究成果对蓄热式燃烧器设计具有指导意义,也为热态射流流场分析奠定了基础。

Isothermal Jet Flow Field Analysis in Regenerative Burner

In order to know high temperature air combustion mechanism, a computer simulation model was setup and was proved correct by test to do isothermal jet flow field analysis in a regenerative burner. The results indicated that the high velocity of air insert jet fluid flow was the main reason for return flow and high temperature air combustion, it was a method to reduce NOx in lower oxygen environment by consumption oxygen in air using the first fuel, there was a optimal distance between the air and the second fuel entrances and the second fuel entrance angle should not be larger. The result of simulation is matched to physical test date, which validated the simulation model. The study forms the basis of further study of hot jet fluid flow and be instructive to regenerative burner design.