多旋流器阵列LDI燃烧室流场的数值模拟

采用雷诺应力模型（RSM）对于同旋向多旋流器阵列LDI燃烧室流场进行了数值模拟。计算结果表明，九个旋流器产生的回流区迅速变形衰减，在远离旋流器阵列的下游，形成了一个大的总体旋流。流场中存在的多个回流区及强湍流表明该燃烧室有潜力实现良好的燃烧性能。通过将RSM的模拟结果与激光多普勒测速仪（LDV）测量值进行比较发现，RSM准确描述了绝大部分流动特性，较好地求解了回流区和高速度梯度问题。

Numerical Simulation of Flowfield in a Multi-Swirler Array LDI Combustor

The Flowfield in a lean direct injection (LDI) combustor with co-rotating multi-swirler array is investigated using Reynolds Stress Model (RSM) computationally. The computational results indicate that the recirculation zones generated by the nine swirlers deform and decay rapidly, and a unified and large swirling flow is formed far downstream of the swirler array. The existence of recirculation zones and strong turbulence levels indicate the potential for excellent combustion performance and low NOx emissions. The RSM-computed results were compared to Laser Doppler Velocimeter (LDV) measurements. The result comparisons indicated that the RSM accurately captured most of the flow characteristics and does a better job of resolving recirculation zones and high velocity gradients.