日本機械学会論文集 B編
Online ISSN : 1884-8346
Print ISSN : 0387-5016
非平衡プラズマによる気流制御
パルス変調制御の効果
松田 寿大友 文雄田中 元史林 和夫野田 伸一水野 末良内田 竜朗青木 一義新関 良樹野田 悦夫
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2008 年 74 巻 744 号 p. 1667-1672

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Unsteady control effect of non-thermal plasma on leading edge separation flow was investigated experimentally. Wind tunnel experiment was done using a NACA0015 airfoil of 9 cm chord length of c under Reynolds number condition of Re=Uc/ν=1.2×105, where U : flow velocity, ν : kinematic viscosity. A pulse modulated mode with a fundamental frequency of 5 kHz was adapted to apply voltage to dielectric-barrier discharge electrodes which were mounted on the leading edge of the airfoil. First, effect of pulse modulation frequency on separation control was investigated. Second, effect of duty cycle was studied. Finally, FFT characteristic of wake flow under the separation control flow was discussed. An optimum frequency of f corresponds to fc/U=0.47 and 10% duty (discharge power of 0.18 W) was found to exist for unsteady excitation of the leading edge separation. FFT analysis result indicates that this optimum unsteady control of the dielectric-barrier discharge has a role to organize coherent structure of the separation flow.

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