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针对斜切径向旋流环形燃烧室模型,采用可调谐二极管激光吸收光谱(TDLAS)、相干反斯托克斯喇曼光谱(CARS)光学测量手段,在模化状态(Case 2)下,对燃烧室主燃区进行温度测量,分别得到了主燃区内12个点的温度和沿两条路径的积分温度.使用Fluent 12.0对Case 2进行数值模拟,分别使用两种非预混燃烧模型:平衡化学反应模型(EM)和稳态层流小火焰(SLF)模型.通过将两种不同燃烧模型的计算结果与TDLAS,CARS试验测量数据作对比验证,发现EM计算得到的温度更高,并与试验测量温度更符合,其中与CARS测量的误差小于6%.在试验验证的基础上,完成燃烧室在冷流状态(Case 1)下的计算,分析主燃区的气流组织和主燃孔射流对回流区的影响;利用EM计算分析燃烧室主燃区在全压状态(Case 3)下燃料分布、温度场、组分分布和性能参数,如燃烧室的燃烧效率为0.97、出口温度分布系数为0.312等,较为全面反映了燃烧室内气流流动换热和燃烧现象.
In the case of the chamfered radial swirling annular combustion chamber model, tunable diode laser absorption spectroscopy (TDLAS) and coherent anti-Stokes Raman spectroscopy (CARS) The temperature in the main combustion zone of the combustion chamber was measured and the temperature of 12 points in the main combustion zone and the integral temperature along the two paths respectively were obtained.The Case 2 was simulated with Fluent 12.0 and two non-premixed combustion models were used respectively: Equilibrium chemical reaction model (EM) and steady-state laminar small flame (SLF) model.By comparing the calculation results of two different combustion models with the measured data of TDLAS and CARS, we find that the calculated temperature of EM is higher and Which is more in line with the experimental temperature measurement, of which the error with CARS measurement is less than 6% .According to the experimental verification, the calculation of the combustion chamber under the condition of cold flow (Case 1) The effect of jet on the recirculation zone was analyzed. The fuel distribution, temperature field, composition distribution and performance parameters of the main combustion zone of the combustion chamber under full pressure (Case 3) were analyzed by using EM. For example, the combustion efficiency of the combustion chamber is 0.97 and the outlet temperature distribution Coefficient of 0.312, etc., more Combustion chamber surface reflects the heat and combustion air flow phenomena.