带圆筒头部火焰筒两相燃烧流场及性能计算

Numerical study of two-phase field and combustion performance in annual combustor with cylindrical heads

关键词:  燃烧室  两相燃烧  流动分布  燃烧性能

Key words:  Combustion chamber  Two phase combustion  Flow distribution  Combustion performance

摘要:

在三维任意曲线坐标系下采用代数雷诺应力紊流模型模拟紊流粘性,Arrhen inus-EBU紊流模型模拟燃烧室内化学反应速率,采用随机轨道模型模拟气液两相之间的相互作用,数值分析不同进口气流参数对带双圆筒头部环形燃烧室两相紊流燃烧流场的影响,同时采用多维经验分析法预估燃烧室性能。通过两种工况计算表明:在最大工况下所得的燃烧流场和燃烧室性能均优于慢车工况。计算结果与试验数据符合较好,表明燃烧过程的数值模拟以及多维经验分析法可为燃烧室优化设计提供有用的设计依据,适合于工程应用。

Abstract:

To investigate the effect of operating conditions on two-phase turbulent reacting flows and combustor performances in an annual combustor with cylindrical heads,algebraic stress model is adopted to simulate turbulent viscosity and Arrheninus EBU-combustion model is used to determine the rate of reaction in three-dimensional arbitrary curvilinear coordinate systems.The liquid phase calculation is performed by the stochastic particle method.Combustor performance is estimated by the empirical-analytical design methodology.The performance in the maximal operating condition is better than that in the idling condition.Calculations are compared with the measurements and the obtained agreement is reasonably good.It is showed that numerical simulation and empirical-analytical design methodology are fairly reliable and appropriate for the primary design of the gas turbine combustor.