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Fan Noise Source Diagnostic Test Ldv Measured Flow Field Results

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Fan Noise Source Diagnostic Test Ldv Measured Flow Field Results

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Author :
language : en
Publisher:
Release Date : 2003

Fan Noise Source Diagnostic Test Ldv Measured Flow Field Results written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.

Fan Noise Source Diagnostic Test

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Author : National Aeronautics and Space Administration (NASA)
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2018-05-31

Fan Noise Source Diagnostic Test written by National Aeronautics and Space Administration (NASA) and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-31 with categories.

Results are presented of an experiment conducted to investigate potential sources of noise in the flow developed by two 22-in. diameter turbofan models. The R4 and M5 rotors that were tested were designed to operate at nominal take-off speeds of 12,657 and 14,064 RPMC, respectively. Both fans were tested with a common set of swept stators installed downstream of the rotors. Detailed measurements of the flows generated by the two were made using a laser Doppler velocimeter system. The wake flows generated by the two rotors are illustrated through a series of contour plots. These show that the two wake flows are quite different, especially in the tip region. These data are used to explain some of the differences in the rotor/stator interaction noise generated by the two fan stages. In addition to these wake data, measurements were also made in the R4 rotor blade passages. These results illustrate the tip flow development within the blade passages, its migration downstream, and (at high rotor speeds) its merging with the blade wake of the adjacent (following) blade. Data also depict the variation of this tip flow with tip clearance. Data obtained within the rotor blade passages at high rotational speeds illustrate the variation of the mean shock position across the different blade passages.Podboy, Gary C. and Krupar, Martin J. and Hughes, Christopher E. and Woodward, Richard P.Glenn Research CenterLASER DOPPLER VELOCIMETERS; AERODYNAMIC NOISE; ROTOR AERODYNAMICS; STATORS; NOISE GENERATORS; INTERACTIONAL AERODYNAMICS; FLOW DISTRIBUTION; FAN BLADES; TURBOFANS; POTENTIAL FLOW

Fan Noise Source Diagnostic Test Far Field Acoustic Results

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Author :
language : en
Publisher:
Release Date : 2002

Fan Noise Source Diagnostic Test Far Field Acoustic Results written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

Unsteady Aerodynamics Aeroacoustics And Aeroelasticity Of Turbomachines

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Author : Kenneth C. Hall
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-05-11

Unsteady Aerodynamics Aeroacoustics And Aeroelasticity Of Turbomachines written by Kenneth C. Hall and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-05-11 with Technology & Engineering categories.

This textbook is a collection of technical papers that were presented at the 10th International Symposium on Unsteady Aerodynamics, Aeroacoustics, and Aeroelasticity of Turbomachines held September 8-11, 2003 at Duke University in Durham, North Carolina. The papers represent the latest in state of the art research in the areas of aeroacoustics, aerothermodynamics, computational methods, experimental testing related to flow instabilities, flutter, forced response, multistage, and rotor-stator effects for turbomachinery.