S0504-4-1 DBDプラズマアクチュエータ誘起噴流の高速化メカニズム解明に関する実験的研究(噴流,後流および剥離流れの流動解析と応用(その4))

概要

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The characteristics of wall normal jets produced by a dielectric barrier discharge (DBD) plasma actuator have been investigated by means of particle image velocimetry (PIV) system. A DBD plasma actuator with doughnut-shaped electrode generates coaxial annular jets by applying high voltage (V) and high frequency (f_p) square wave signals with various voltage surge velocities (dV/dt) which can be produced by a developed power supply. Variations of velocity distributions of coaxial annular jets produced by DBD plasma actuator are measured for amplitude of input voltage V_m 2.3 ⪯ V_m ⪯ 3.3 kV, 2.5 ⪯ f_p ⪯ 10 kHz, and 50 ⪯ dV/dt ⪯ 1,000 volts/μsec. It is found that the speed of tangential jet reaches its maximum when the voltage surge velocity is in the range of 150 ⪯ dV/dt ⪯ 250 volts/μsec, and the intermittent peak currents occur in certain time scales (δt_s) and δt_s shortens as dV/dt increases.
社団法人日本機械学会の論文
2009-09-12