Stretching of freestream turbulence in the stagnation region

Chin Yi Wei, Jiun Jih Miau

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)


Characteristics of stretched vortices in the stagnation region, due to the presence of freestream turbulence in the incident stream, were studied by means of spatial correlation. The spanwise length scale of the stretched vortices, lm, and the characteristic height corresponding to the distance between the averaged position of the centers of the stretched vortices and the plate, Hv, are successfully correlated with the integral length scale of freestream turbulence. It is found that for each of the cases studied lm and Hv are comparable, and lm falls in the range of ∼ 0.61-0.81 times the integral length scale of the corresponding freestream turbulence. Thus, the mechanism of inviscid vorticity stretching is suggested responsible for the development of three-dimensional vortical structures in the stagnation region outside the viscous layer.

頁(從 - 到)2196-2203
期刊AIAA journal
出版狀態Published - 1992 9月

All Science Journal Classification (ASJC) codes

  • 航空工程


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