Time-Resolved PIV Applied to Trailing-Edge-Noise Reduction by DBD Plasma Actuator
Time-Resolved PIV Applied to Trailing-Edge-Noise Reduction by DBD Plasma Actuator
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DBD 等离子体致动器将时间分辨 PIV 应用于后缘降噪
DOI：
10.2514/6.2010-4352
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Shigeya Watanabe
中科院分区：
文献类型：
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作者：
S. Koike;H. Kato;Hiroshi Kobayashi;H. Ura;K. Mitsuo;T. Atobe;T. Okubo;Shigeya Watanabe
采用时间分辨粒子图像测速技术（TR-PIV）测量了NACA0012型载介质阻挡放电等离子体作动器（DBD-PA）的尾缘涡。以5 kHz的采样率成功地测量了非定常速度数据。在测量区域，当DBD-PA关闭时，吸力侧以464 Hz的频率发射与气动噪声有关的涡，压力侧以352 Hz的频率发射与气动噪声无关的涡。DBD-PA在电压模式和占空比模式下工作。DBD-PA在两种模式下均显著减少了压力侧产生的涡。在电压模式下，低输入功率情况下，吸力侧发出的涡引起的速度波动增大，高输入功率情况下，速度波动减小。在占空比模式下，主速度波动的频率变为占空比的频率。
Time resolved particle Image Velocimetry (TR-PIV) was applied to the measurement of the trailing edge vortices emitted from an NACA0012 airfoil with a Dielectric Barrier Discharged Plasma Actuator (DBD-PA). The unsteady velocity data was successfully measured at sampling rate of 5 kHz. In the measurement region, the vortices relating to the aeroacoustic noise were emitted at 464 Hz from the suction side, and the vortices not relating to the aeroacoustic noise were emitted at 352 Hz from the pressure side when the DBD-PA was off. The DBD-PA was operated in the voltage mode and in the duty cycle mode. The DBD-PA dramatically reduced the vortices emitted from the pressure side in the both mode. In the voltage mode, the velocity fluctuation caused by the vortices emitted from the suction side increased in the low input power cases and decreased in the high input power cases. In the duty cycle mode, the frequency of the main velocity fluctuation changed into the frequency of the duty cycle.