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: 254.08 RON
Availability: InStock

Autor: Jae Jeen Choi

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Editura: VDM Verlag

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254.08 lei

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

Informații despre carte

Autor

Jae Jeen Choi

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2009

Pagini

116

EAN

9783639107661

ISBN

3639107667

Enbook ID

06819706

Editura

VDM Verlag

Greutate

163

Dimensiuni

152 x 229 x 6

Descriere completă

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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