EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES

David A. Peters; Swami Karunamoorthy; Michael Sobol

doi:10.1115/IMECE1997-0157

EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES

David A. Peters
, Swami Karunamoorthy
, Michael Sobol

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

The flow field around a lifting rotor in hover or forward flight is represented by a matched expansion that includes an inner expansion (near the blade chord) and an outer expansion that encompasses the rotor disk. The inner expansion is expanded in Glauert variables and is completely unsteady. It is driven by blade motions and the global flow-field variable Aq which is provided by the outer expansion. The outer expansion is in terms of rotor harmonics and radial Legendre functions (which are polynomials in r on the blade). It is driven by the time-rate of change of bound circulation as provided from the inner expansion. Together, these form a robust convergent expansion of the rotor flow field that is good over a broad range of frequencies.

Original language	English
Title of host publication	4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise
Subtitle of host publication	Volume III
Publisher	American Society of Mechanical Engineers (ASME)
Pages	31-40
Number of pages	10
ISBN (Electronic)	9780791826775
DOIs	https://doi.org/10.1115/IMECE1997-0157
State	Published - 1997
Event	ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise - Dallas, United States Duration: Nov 16 1997 → Nov 21 1997

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	1997-C

Conference

Conference	ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise
Country/Territory	United States
City	Dallas
Period	11/16/97 → 11/21/97

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10.1115/IMECE1997-0157

Cite this

Peters, D. A., Karunamoorthy, S., & Sobol, M. (1997). EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES. In 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III (pp. 31-40). (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 1997-C). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE1997-0157

Peters, David A. ; Karunamoorthy, Swami ; Sobol, Michael. / EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES. 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III. American Society of Mechanical Engineers (ASME), 1997. pp. 31-40 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)).

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title = "EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES",

abstract = "The flow field around a lifting rotor in hover or forward flight is represented by a matched expansion that includes an inner expansion (near the blade chord) and an outer expansion that encompasses the rotor disk. The inner expansion is expanded in Glauert variables and is completely unsteady. It is driven by blade motions and the global flow-field variable Aq which is provided by the outer expansion. The outer expansion is in terms of rotor harmonics and radial Legendre functions (which are polynomials in r on the blade). It is driven by the time-rate of change of bound circulation as provided from the inner expansion. Together, these form a robust convergent expansion of the rotor flow field that is good over a broad range of frequencies.",

author = "Peters, \{David A.\} and Swami Karunamoorthy and Michael Sobol",

note = "Publisher Copyright: {\textcopyright} 1997 American Society of Mechanical Engineers (ASME). All rights reserved.; ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise ; Conference date: 16-11-1997 Through 21-11-1997",

year = "1997",

doi = "10.1115/IMECE1997-0157",

language = "English",

series = "ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)",

publisher = "American Society of Mechanical Engineers (ASME)",

pages = "31--40",

booktitle = "4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise",

}

Peters, DA, Karunamoorthy, S & Sobol, M 1997, EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES. in 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 1997-C, American Society of Mechanical Engineers (ASME), pp. 31-40, ASME 1997 International Mechanical Engineering Congress and Exposition, IMECE 1997 - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise, Dallas, United States, 11/16/97. https://doi.org/10.1115/IMECE1997-0157

EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES. / Peters, David A.; Karunamoorthy, Swami; Sobol, Michael.
4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III. American Society of Mechanical Engineers (ASME), 1997. p. 31-40 (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); Vol. 1997-C).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

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AU - Karunamoorthy, Swami

AU - Sobol, Michael

PY - 1997

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N2 - The flow field around a lifting rotor in hover or forward flight is represented by a matched expansion that includes an inner expansion (near the blade chord) and an outer expansion that encompasses the rotor disk. The inner expansion is expanded in Glauert variables and is completely unsteady. It is driven by blade motions and the global flow-field variable Aq which is provided by the outer expansion. The outer expansion is in terms of rotor harmonics and radial Legendre functions (which are polynomials in r on the blade). It is driven by the time-rate of change of bound circulation as provided from the inner expansion. Together, these form a robust convergent expansion of the rotor flow field that is good over a broad range of frequencies.

AB - The flow field around a lifting rotor in hover or forward flight is represented by a matched expansion that includes an inner expansion (near the blade chord) and an outer expansion that encompasses the rotor disk. The inner expansion is expanded in Glauert variables and is completely unsteady. It is driven by blade motions and the global flow-field variable Aq which is provided by the outer expansion. The outer expansion is in terms of rotor harmonics and radial Legendre functions (which are polynomials in r on the blade). It is driven by the time-rate of change of bound circulation as provided from the inner expansion. Together, these form a robust convergent expansion of the rotor flow field that is good over a broad range of frequencies.

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U2 - 10.1115/IMECE1997-0157

DO - 10.1115/IMECE1997-0157

M3 - Conference contribution

AN - SCOPUS:85126965526

T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)

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BT - 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise

PB - American Society of Mechanical Engineers (ASME)

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Peters DA, Karunamoorthy S, Sobol M. EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES. In 4th International Symposium on Fluid-Structure Interactions, Aeroelasticity, Flow-Induced Vibration and Noise: Volume III. American Society of Mechanical Engineers (ASME). 1997. p. 31-40. (ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)). doi: 10.1115/IMECE1997-0157

EXTENSION OF DYNAMIC WAKE MODELS FOR MODERATE TO HIGH REDUCED FREQUENCIES

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