使用RKE模型和RSM模型对某旋流燃烧器进行3D冷态湍流流动模拟计算，并从精度、计算量和收敛性3个方面对两个模型进行了比较。通过与PIV所测得的出口冷态流场对比表明，两个模型均可以较准确地预测燃烧器出口的宏观流场、径向速度和轴向速度分布。相比较而言，RSM模型在预报流场速度峰值的位置、回流区的大小、主流射流宽度等方面比RKE模型更准确一些，在收敛性上RSM模型也占优，而在计算量上，RSM模型略大一些，但对反应流计算，两个模型计算量基本一致。研究表明在模拟旋流燃烧器流场时RSM模型具有一定的优越性，建议优先考虑。
RKE and RSM models were respectively used to numerically simulate the cold 3D turbuhmt flow field for a swirl burner. The comparison of the two models is performed according to their sinmlation accuracy, cost and convergence. Compared with PIV measurelnent results, both models are able to predict qualitatively the global flow fields as well as the axial and radial velocity distribution adjacent to the burner exit. Relatively, RSM model predicts more accurately the position of peak velocity, the shape and size of recirculation zone, and the width of the jet than RKE model. IH addition, tile sinmlation with RSM model has better convergence perfbrmance than that with RKE model. For the cold simulation, RSM model is slightly more costly but for the combustion sinnflation, the silnulation cost of two models is nearly the same. Consequently, RSM model prevails over RKE model in the simulation of a swirl burner and should be considered with higher propriety.
参考文献
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| [2] | 倪建民,陈云,樊建人,岑可法.旋流燃烧器出口湍流流场的数值模拟[J].动力工程,2004(01):102-105. |
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