一种模型低污染燃烧室三维两相数值模拟

贫油预混预蒸发(LPP)技术是目前最具发展前景的低污染燃烧技术,可实现很低的NOX排放。本文采用FLU ENT软件,对一种模型低污染燃烧室(采用LPP燃烧技术)进行三维两相数值模拟计算分析,研究了模型燃烧室的流场结构、流量分配、回流特性、雾化特性和燃烧性能,并对NOX排放进行了预测。结果表明,模型燃烧室流场中存在与TAPS燃烧室相似的三个涡结构,流量分配与试验吻合良好,雾化特性良好并具有较好的温度场和低的NOX排放。

Numerical Simulation of the Three-Dimensional Nonreactive and Reactive Flow in a Low Emission Combustor Model

The Lean Premixed Prevaporized(LPP) technology is the most promising low emission technology in aero-engine combustor design,which makes the emission level of pollutant NOx very low.Three-dimensional non-reactive and reactive flow in a LPP model combustor was studied numerically by using FLUENT software,involving the structure of recirculation zone,characteristics of recirculation flow and atomization,performances of combustion and NOx emission forecast.The results indicated that recirculation zone had three vortexes as the same as TAPS combustor,mass-flow distribution agreed well with experimental data,the performances of atomization and combustion were fine,and the emission level of pollutant NOx was low.