Active Noise Control in Supersonic Impinging Jets Actuator Design, Reduced-Order Modeling

Name: Active Noise Control in Supersonic Impinging Jets Actuator Design, Reduced-Order Modeling
Brand: VDM Verlag
SKU: 9783639107661
Price: 1172 CZK
Availability: InStock

Autor: Jae Jeen Choi

Jazyk:

Vazba: Brožovaná

Vydavatel: VDM Verlag

Dostupnost: U nakladatele na objednávku

Odesíláme za 17-27 dnů

1 172 Kč

In recent years it has been demonstrated that direct §microjet injection into the shear layer of the...

Informace o knize

Autor

Jae Jeen Choi

Jazyk

Angličtina

Vazba

Kniha - Brožovaná

Vydáno

2009

Stránek

116

EAN

9783639107661

ISBN

3639107667

Enbook ID

06819706

Vydavatel

VDM Verlag

Hmotnost

163

Rozměry

152 x 229 x 6

Kompletní popis

In recent years it has been demonstrated that direct §microjet injection into the shear layer of the main §jet disrupts the feedback loop inherent in high §speed impinging jet flows, thereby significantly §reducing the adverse effects. The amount of noise §reduced by microjet actuation is known to be §dependent on nozzle operating conditions. In this §book, two active control strategies using microjets §are suggested to maintain a uniform, reliable, and §optimal reduction of these tones over the entire §range of operating conditions.§In order to obtain an optimal performance of the §actuator, a two-mode feedback model that captures §both the low and high-frequency Rossiter mode was §suggested to investigate the role of pulsed microjet §in the feedback loop. Due to the fact that a low §frequency pulsing brought about additional reduction §compared to high frequency pulsing, the presence of §low frequency mode is identified. In the context of §the analytic model, the effect of pulsing is modeled §using a input-shaping controller that accomplishes §noise-reduction through a suitable redistribution of §the acoustic excitation over the high and low §frequencies.

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Active Noise Control in Supersonic Impinging Jets Actuator Design, Reduced-Order Modeling

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