Experimental studies of the influence of parameters on axisymmetric synthetic jets
Experimental studies of the influence of parameters on axisymmetric synthetic jets
复制标题
参数对轴对称合成射流影响的实验研究
DOI：
10.1016/j.sna.2009.11.006
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Wang J J
中科院分区：
文献类型：
--
作者：
Shan R Q;Shan R Q;Wang J J;Wang J J
本文利用流动可视化和粒子图像测速（PIV）技术研究了两个无量纲参数（雷诺数和无量纲行程）对轴对称合成射流的影响。提供了流动可视化结果和相关分析，例如涡环的形成和状态、时均流向速度和脉动运动的动能等。发现雷诺数不影响涡环的形成位置；然而，随着雷诺数的增加，涡环会经历层流-湍流转变，并且往往会失去稳定性，从而导致破裂。此外，在孔口下游短距离处即可达到脉动运动射流动能分布的相似性，并且当雷诺数增大到一定值时，也出现常规湍流射流的特征。无量纲冲程强烈影响涡环的形成和发展。此外，本文还对由Zhang和Wang提出的新型执行器信号驱动的轴对称合成射流进行了实验研究[16]，并引入了“实际有效行程”的概念。
This paper studies the influences of two dimensionless parameters, the Reynolds number and dimensionless stroke, on an axisymmetric synthetic jet by using flow visualization and particle image velocimetry (PIV) techniques. The flow visualization results and the relevant analyses, such as the formation and state of the vortex ring, the time-averaged streamwise velocity and kinetic energy of the fluctuating motion, etc., are provided. It was found that the Reynolds number does not influence the formation location of vortex rings; however, with increasing Reynolds number, the vortex rings go through the laminar–turbulent transition and tend to lose stability, leading to breakdown. In addition, the similarity of the jet kinetic energy distribution of fluctuating motion can be reached in a short distance downstream from the orifice, and the characteristics of conventional turbulent jets also appear as the Reynolds number is increased to a certain value. The dimensionless stroke strongly influences the formation and development of vortex rings. Furthermore, the experimental investigations on an axisymmetric synthetic jet actuated by a novel actuator signal, proposed by Zhang and Wang [16], are implemented in the present paper, and the ‘actual efficient stroke’ concept is introduced.
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影响因子：
4.6
作者：
Z. Trávníček;T. Vít;V. Tesař
通讯作者：
Z. Trávníček;T. Vít;V. Tesař
影响因子：
4.6
作者：
Wang Jinjun;Feng Lihao;X. Chaojun
通讯作者：
Wang Jinjun;Feng Lihao;X. Chaojun
DOI：
10.2514/6.1998-4523
发表时间：
1998-08
期刊：
--
影响因子：
--
作者：
C. Nae
通讯作者：
C. Nae
DOI：
10.2514/6.2003-636
发表时间：
2003-01
期刊：
--
影响因子：
--
作者：
Y. Utturkar;R. Holman;R. Mittal;B. Carroll;M. Sheplak;L. Cattafesta
通讯作者：
Y. Utturkar;R. Holman;R. Mittal;B. Carroll;M. Sheplak;L. Cattafesta
影响因子：
4.6
作者：
GLEZER, A
通讯作者：
GLEZER, A