不同构型和多点喷射对短环型燃烧室燃烧性能的影响

对短环形流燃烧室内有较强回流的湍流旋流流动进行了模拟,并从两个方面(燃烧室构型和多点喷射)对燃烧室性能的影响进行了分析。计算中采用Reynoldes应力湍流模型(RSM)、EBU-Arrheniue湍流燃烧模型和离散坐标辐射模型描述其燃烧流动,液相采用Lagrange法处理,气相采用SIMPLE法求解。研究表明:在燃料和空气总流量不变的情况下,燃烧室构型对燃烧室出口平均温度影响不大,对出口温度分布、燃烧室内空气流场有比较大的影响。喷嘴数目的改变对出口处的平均温度和平均速度影响不大,但是对出口截面处的温度分布影响比较大,在局部范围可能产生温度比较高的热斑。

Influence of Different Structure and Multiple Injections on the Annular Combustor Performance

The numerical simulation three-dimensional and two-phase turbulent reactive flow in a annular combustor is conducted and the performance of combustion from two aspects of the combustor structure and multiple injections is discussed,where RSM Reynolds-stress turbulence model,EBU-Arreniue combustion model and discrete ordinate radiation model are employed.The numerical results indicate that under the condition of unchanged total mass of air and fuel,great effect on the average temperature and velocity achieves at the combustor outlet,while the distribution of the outlet temperature the air flow in the combustion are strongly disturbed.The changed number of injectors does not affect the average temperature and velocity of the outlet,but for the distribution of the temperature,hot spots somewhere.