Attenuation of Low-Speed Flow-Induced Cavity Tones Using Plasma Actuators

Variable Structure Model for Flow-Induced Tonal Noise Control with Plasma Actuators

“…Other than attenuating flow-induced tonal noise, the plasma actuator also radiates high-frequency tones that are harmonics of the plasma driving signal. The experimental data [13] show that the amplitude of the high-frequency tones increases along with the input power. More details related to the physics of glow discharges affecting the fluid dynamics and acoustics have been given in the previous work [13,14] and will not be repeated here.…”

“…The experimental data [13] show that the amplitude of the high-frequency tones increases along with the input power. More details related to the physics of glow discharges affecting the fluid dynamics and acoustics have been given in the previous work [13,14] and will not be repeated here. To improve the power efficiency for potentially large plasma actuators, a closed-loop control system is believed to reduce power consumption compared with an open-loop system [25].…”

“…The principle of using plasma actuators for aeroacoustic noise control is to sufficiently modify the flowfield to disrupt or minimize the mechanisms of flow-induced noise. Our previous work [13,14] demonstrated the use of plasma actuators for attenuating cavity tonal noise that is similar to landing gear bay noise. The problem has been frequently employed as a testbed in the study of flow-induced noise control [15][16][17][18].…”

“…More recently, plasma actuator technology has been applied to aeroacoustic applications [12][13][14]. The principle of using plasma actuators for aeroacoustic noise control is to sufficiently modify the flowfield to disrupt or minimize the mechanisms of flow-induced noise.…”

Концевые Эффекты При Обтекании Плазменного Актуатора

“…Одним из наиболее перспективных приложений является управление с помощью плазменных актуаторов возмущениями и волнами в пограничных и сдвиговых слоях [1][2][3]. Такие исследования проводились для управления двумерными и трехмерными пограничными слоями для различных типов возмущений [4,5], а также для управления аэроакустическими характеристиками сдвиговых слоев в соплах и кавернах [3,[6][7][8]. Ис-пользование актуатора в качестве источника начальных возмущений в пограничном слое зачастую требует точной информации о геометрии воздействия, в том числе в окрестности боковых кромок электродов.…”