| 高能压电合成射流激励器的实验研究 |
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| 引用本文： | 张蕾,严阳阳,李博,丁英涛.高能压电合成射流激励器的实验研究[J].北京理工大学学报,2014,34(9):981-984. |
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| 作者姓名： | 张蕾 严阳阳 李博 丁英涛 |
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| 作者单位： | 北京理工大学信息与电子学院,北京100081;北京理工大学信息与电子学院,北京100081;北京理工大学信息与电子学院,北京100081;北京理工大学信息与电子学院,北京100081 |
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| 基金项目： | 北京理工大学基础研究基金资助项目(20110542016) |
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| 摘 要： | 为有效控制飞行器边界层的流动分离和增强掺混,提出了一种全新的流动控制技术. 采用微细加工技术成功地制作了压电合成射流激励器,并对其流场特性进行了测试,得到了激励器的流向和展向射流速度分布规律以及流向速度与频率之间的关系. 结合理论分析和数值模拟,验证了实验结果的合理性,对合成射流激励器的优化设计提供了重要参考. 从流向速度与频率关系曲线中,获得了Helmholtz频率(fH=425 Hz)及压电薄膜的固有频率(fM=850 Hz). 流向速度分布曲线表明,中心线速度最大值出现在喷口下游.
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| 关 键 词： | 压电合成射流 激励器 热线 Helmholtz频率 |
| 收稿时间： | 2012/11/23 0:00:00 |
Experimental Investigation of Piezoelectric Synthetic Jet Actuators |
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| ZHANG Lei,YAN Yang-yang,LI Bo and DING Ying-tao.Experimental Investigation of Piezoelectric Synthetic Jet Actuators[J].Journal of Beijing Institute of Technology(Natural Science Edition),2014,34(9):981-984. |
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| Authors: | ZHANG Lei YAN Yang-yang LI Bo and DING Ying-tao |
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| Affiliation: | School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | Synthetic jet actuator is a new kind of flow control technique which has become a hot topic recently. This technique has great potential in flow separation control, mixing augmentation and front vortex control. A synthetic jet actuator was micro-fabricated and the flow characteristics has been studied by using hot-wire anemometer in this paper. The distribution of streamwise & spanwise velocity and swept frequency characteristics were given through experiment. The experimental data has verified its effectiveness. It is shown that the Helmholtz frequency is 425 Hz, and mechanical resonance frequency of PZT diaphragm is 850 Hz. And the maximum of centerline velocity is not located at the outlet of actuator. The research is a contribution to the optimization of synthetic jet actuators. |
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| Keywords: | piezoelectric synthetic jet actuator hot-wire anemometer Helmholtz frequency |
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