Eduction of Vortical Structures by Pressure Measurements in Noncircular Jets
Eduction of Vortical Structures by Pressure Measurements in Noncircular Jets
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通过非圆形射流压力测量推导涡旋结构
DOI：
10.1007/bf00849102
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发表时间：
1994
影响因子：
2.4
通讯作者：
Y. Shirahama
中科院分区：
文献类型：
--
作者：
K. Toyoda;T. Okamoto;Y. Shirahama
通过测量脉动静压，得到了非圆射流在相互作用模式下的涡结构，并结合非圆射流的混合机理讨论了涡结构的特征。相平均脉动压力等值线图清晰地显示了非圆射流的旋涡结构，与流动显示实验结果相吻合。涡结构的演化表现为部分合并、拉伸和分裂成较小的涡。在速度场定量测量的基础上，讨论了非圆涡结构对混合的影响，结果表明，非圆射流中涡结构的相互作用对增强混合是非常有效的。
Vortical structures in the noncircular jets excited at the interaction mode were educed by measuring fluctuating static pressure, and their characteristics were discussed in relation to the mixing mechanism of the noncircular jets. The contours of phase-average fluctuating pressure show clearly the vortical structures of the noncircular jets, which compare reasonably with those observed by the flow visualization experiments. The evolution of the vortical structures is characterized by partial merging, stretching and splitting to smaller vortices. The effects of the noncircular vortical structures on mixing were also discussed based on the quantitative measurements of the velocity fields, the results suggesting that the interactions of vortical structures in the noncircular jets are very effective to enhance mixing.