An Evaluation of Some Alternative Approaches for Reducing Fan Tone Noise
Author:   National Aeronaut Administration (Nasa)
Publisher:   Createspace Independent Publishing Platform
ISBN:  

9781725095687


Pages:   38
Publication Date:   17 August 2018
Format:   Paperback
Availability:   In Print   Availability explained
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An Evaluation of Some Alternative Approaches for Reducing Fan Tone Noise


Overview

The potential of two alternative approaches for reducing fan ton noise was investigated in this study. One of these approaches increases the number of rotor blades to shift the tone noise to higher frequencies that are not rated as strongly by the perceived noise scale. This alternative fan also would have a small number of long chord stator vanes which would reduce the stator response and lower rotor-stator interaction noise. Comparison of the conventional and alternative fan concepts showed that this alternative approach has as large or larger a perceived tone noise reduction potential as the conventional approach. The other alternative, a high Mach number inlet, is evaluated both for its noise attenuation and for its change in noise directivity. Dittmar, James H. and Woodward, Richard P. Glenn Research Center NASA-TM-105356, E-6730, NAS 1.15:105356 RTOP 535-03-10...

Full Product Details

Author:   National Aeronaut Administration (Nasa)
Publisher:   Createspace Independent Publishing Platform
Imprint:   Createspace Independent Publishing Platform
Dimensions:   Width: 21.60cm , Height: 0.20cm , Length: 27.90cm
Weight:   0.115kg
ISBN:  

9781725095687


ISBN 10:   1725095688
Pages:   38
Publication Date:   17 August 2018
Audience:   General/trade ,  General
Format:   Paperback
Publisher's Status:   Active
Availability:   In Print   Availability explained
This item will be ordered in for you from one of our suppliers. Upon receipt, we will promptly dispatch it out to you. For in store availability, please contact us.

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