Suppression of vortex shedding from a pantograph head using vortex generator-type plasma actuators
Suppression of vortex shedding from a pantograph head using vortex generator-type plasma actuators
复制标题
使用涡流发生器型等离子体执行器抑制受电弓头的涡流脱落
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Ikeda
中科院分区：
文献类型：
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作者：
Haruhiko Gejima;R. Takinami;K. Fukagata;T. Mitsumoji;Takeshi Sueki;M. Ikeda
涡流发生器（VG）是用于抑制湍流分离的最成功的装置之一。传统的VG是被动控制装置，因此它可以承受固有的阻力损失。作为替代方案，我们使用介质阻挡放电等离子体致动器（PA）作为VG。由于对这种涡流发生器型等离子体激励器（VG-PA）的研究很少，许多问题仍然没有解决，例如，VG-PA抑制蓝体涡脱落的有效性和性能。在本研究中，我们实验评估的VG-PA的性能，将其应用到高速列车的受电弓头模型。基于自由速度和弓头模型宽度的雷诺数为7200。由VG-PA引起的展向速度约为自由展向速度的33%。用粒子图像测速仪测量了流场。目前的结果表明，VG-PA可以显著抑制受电弓头部模型的旋涡脱落，这相当于横向速度脉动减少约60%。研究还表明，在单侧配置中，猝发放电控制显著地改善了控制效果，其中在连续模式中，涡脱落没有受到太大抑制。
A vortex generator (VG) is one of the most successful devices used for suppression of flow separation. A con-ventional VG is a passive control device, so that it may su ff er from an inherent drag penalty. As an alternative, we use a dielectric-barrier-discharge plasma actuator (PA) as a VG. Since few studies have been made on such a vortex generator-type plasma actuator (VG-PA), many questions still remain open, e.g., the e ff ectiveness and the performance of the VG-PA for suppression of vortex shedding from a blu ff body. In the present study, we experimentally evaluate the performance of the VG-PA by applying it to a pantograph head model of high-speed trains. The Reynolds number based on the freestream velocity and the width of the pantograph head model is 7200. The spanwise velocity induced by the VG-PA is about 33% of the freestream velocity. The flow field is measured by using particle image velocimetry. The present results show that the vortex shedding from a pantograph head model can significantly be suppressed by the VG-PA, which amounts to about 60% reduction in the transverse velocity fluctuations. It is also shown that a burst discharge control significantly improves the control e ff ect in the single-side configuration, in which the vortex shedding is not much suppressed in the continuous mode.
影响因子：
2.4
作者：
Jukes, Timothy N.;Choi, Kwing-So
通讯作者：
Choi, Kwing-So
影响因子：
3.7
作者：
Jukes, Timothy N.;Choi, Kwing-So
通讯作者：
Choi, Kwing-So