摘要
本文通过四角喷射炉膛内回旋流场的数值计算和实验测试的对比研究，比较了几种计算方法的预估结果与实验结果的符合程度。结果表明：为克服当流动方向与网格线交角过大时所产生的过分数值伪扩散，引入流向平衡粘性方法与ｋ－ε湍流模型相结合可获得与实验结果相一致的计算结果；而采用混合差分格式加ｋ－ε模型所得到的计算结果比流向平衡粘性方法加等效常湍流粘性系数这样的简化处理的计算结果还要差。
It is studied that numerical simulation which have a few numerical method compares with experiment results in the circular flow field of four corner-jet furnace chamber model.The level of conforming prodictive results of several numerical simulation to experiment values compares each other.The results show that the numerical method of a streamwise balancing vicosity with k_ε model can get good results agreed with experiment for protecting over numerical diffusion when there is a large angle between flow and coordinate direction. But the results got by the hybrid scheme with k_ε model are worse than that by the method of balancing viscosity with costant turbulent viscosity which is so simple model a way from results of experiment.
出处
《空气动力学学报》
CSCD
北大核心
1994年第2期178-185,共8页
Acta Aerodynamica Sinica
基金
机电部基金
关键词
回旋流动
五孔探针
煤粉锅炉
circular flow,streamwise balancing viscosity method,5-hole probe,flow field measurement.
