Wake Oscillation of Column Wall Jet in Uniform Flow
Wake Oscillation of Column Wall Jet in Uniform Flow
复制标题
均匀流中塔壁射流的尾流振荡
DOI：
10.2322/jjsass.54.288
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Yōichi Ono
中科院分区：
文献类型：
--
作者：
Yohei Yoshida;Kotaro Sato;Yōichi Ono
通过实验和计算，阐明了均匀流场中柱壁射流对尾流振荡特性的影响。当射流方向与均匀流相匹配时，涡强度减小，振荡减弱。当射流反向时，涡强度增大，振荡幅度增大。已经发现，基于流速分布的半宽度的Strouhal数几乎是恒定的。此外，频率依赖于尾流的涡结构，这是进一步依赖于射流速度。此外，在实验和计算中均发现了振荡谱中出现双峰的情况。
Both experiment and calculation demonstrated to clarify the effect of a column wall jet in uniform fluid flow on the characteristic of wake oscillation. The vortex intensity decreased and the oscillations attenuated when the jet direction matched the uniform flow. When the jet flow was reversed, the vortex intensity grew and the oscillations increased in magnitude. It has been found that the Strouhal number based on the half width of the flow velocity distribution was nearly constant. Also, the frequency depended on the vortex structure of the wake, which was further dependent on the jet flow velocity. In addition, the situations that gave twin peaks in the oscillation spectrum were found both in experiment and in calculation.