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Showing 1 to 4 of 4 for “"Turbofan Noise"”.
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Theoretical Modeling with Validation of a Combined HQ-Liner System for Turbofan Engine Noise Control
… is proposed in this work as a device for Turbofan Engine Noise Control. The approach consists of installing circumferential arrays of HQ tubes on the lined sector of the inlet of a turbofan engine. A theoretical model is developed to predict the performance of this system assuming that the …
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Analysis and Synthesis of Aicraft Engine Fan Noise for Use in Psychoacoustic Studies
Community noise impact is an important factor in design of current generation aircraft, especially when considering projected trends in flight volume and urbanization. Simulation is a useful tool to evaluate the human annoyance response due to both current and proposed aircraft, and it has some …
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Modeling of Herschel/Quincke-Liner Systems for the Control of Aft Fan Radiation in Turbofan Engines
… expansion has encountered an important barrier: noise. Several studies have shown that residents in these areas experience problems such as stress and sleep disturbance. These problems have translated into demands for a better quality of life from airport residents which in turn have translated …
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On the Use of Surface Porosity to Reduce Wake-Stator Interaction Noise
… and rotor-strut interactions, linked to noise and fatigue failure in turbomachinery environments. A computational study was designed to assess the potential of Passive Porosity Technology as a mechanism for alleviating interaction effects and radiated noise by reducing the fluctuating …