高温升燃烧室综合燃烧性能超大涡模拟

Very Large Eddy Simulation of Comprehensive Combustion Performance in High Temperature Rise Combustor

为了对高温升燃烧室性能进行计算分析,运用超大涡模拟方法开展数值模拟,并同步开展了雷诺平均数值模拟作为对比。计算结果表明:旋流器设计与火焰筒开孔设计的匹配合理,Rothstein提出的射流迹线公式能够合理预测主燃孔的射流穿透。超大涡模拟计算得到的出口径向温度分布系数的剖面曲线趋势和最大值位置均与试验结果符合较好。通过与试验结果进行定量比较发现,在相同计算网格条件下,超大涡模拟方法预测高温升燃烧室综合燃烧性能的精度明显高于雷诺平均方法的。

In order to calculate and analyze the performance of high temperature rise combustor,the numerical simulation was carried out by using very large eddy simulation(VLES)method,and numerical simulation of Reynolds-averaged Navier-Stokes(RANS)was carried out simultaneously as a comparison.The calculation results show that the matching between the swirler design and flame tube opening hole design is reasonable,and the jet trajectory formula given by Rothstein can predict the jet penetration of main combustion hole reasonably.The profile curve trend and maximum position of the outlet radial temperature distribution coefficient obtained from the VLES are in good agreement with the test results.Quantitative compared with the test results,it is found that the precision of VLES method to predict the comprehensive combustion performance of high temperature rise combustor is obviously higher than that of RANS method under the same grid condition.