Vortex Generator Flow Model Based on Self-Similarity
Vortex Generator Flow Model Based on Self-Similarity
复制标题
基于自相似性的涡流发生器流动模型
DOI：
10.2514/1.j051865
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
C. Velte
中科院分区：
文献类型：
--
作者：
C. Velte
The present work examines the downstream vortex evolution behind a cascade of vortex generators producing counter-rotating vortices in a boundary layer of negligible streamwise pressure gradient. For the current study, which is an extension of the model presented in [4], these parameters are all seen to vary linearly in the downstream direction. Based on the experimental observations triggered by a previous study, the vortices generated by vortex generators have been observed to be self-similar for both the axial ($u_z$) and azimuthal ($u_{\theta}$) velocity profiles. The previous model, which is based merely on $u_z$ and $u_{\theta}$ at one single downstream location, can therefore be extended to include the downstream development of the vortex using self-similarity scaling arguments. This knowledge is important for fundamental understanding as well as for the aspect of applications, for which parametric experiments can be substantially reduced in terms of required time and cost by facilitating engineering models.
