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There are a total of 16 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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The 90 deg Acoustic Spectrum of a High Speed Air Jet
Author(s): Goldstein, Marvin E.
Abstract: Tam and Auriault successfully predicted the acoustic spectrum at 90deg to the axis of a high speed air jet by using an acoustic equation derived from ad hoc kinetic theory-type arguments. The present paper shows that similar ...
NASA Center: Glenn Research Center
Publication Year: 2004
Added to NTRS: 2008-06-02
Document ID: 20050196696; Report Number: E-14396
Effect of Free Stream Turbulence and Other Vortical Disturbances on a Laminar Boundary Layer
Author(s): Goldstein, Marvin E.; Leib, S. J.; Wundrow, David W.
Abstract: This paper is concerned with the effect of free-stream turbulence on the pretransitional flat-plate boundary layer. It is assumed that either the turbulence Reynolds number or the downstream distance (or both) is small ...
NASA Center: Glenn Research Center
Publication Year: 1997
Added to NTRS: 2008-06-02
Document ID: 19980237984
Emission of Sound from Turbulence Convected by a Parallel Mean Flow in the Presence of a Confining Duct
Author(s): Goldstein, Marvin E.; Leib, Stewart J.
Abstract: An approximate method for calculating the noise generated by a turbulent flow within a semi-infinite duct of arbitrary cross section is developed. It is based on a previously derived high-frequency solution to Lilley's ...
NASA Center: Glenn Research Center
Publication Year: 1999
Added to NTRS: 2008-06-02
Document ID: 20000000186
An Exact Form of Lilley's Equation with a Velocity Quadrupole/Temperature Dipole Source Term
Author(s): Goldstein, Marvin E.
Abstract: There have been several attempts to introduce approximations into the exact form of Lilley's equation in order to express the source term as the sum of a quadrupole whose strength is quadratic in the fluctuating velocities ...
NASA Center: Glenn Research Center
Publication Year: 2001
Added to NTRS: 2008-06-02
Document ID: 20010059039
A Hybrid RANS/LES Approach for Predicting Jet Noise
Author(s): Goldstein, Marvin E.
Abstract: Hybrid acoustic prediction methods have an important advantage over the current Reynolds averaged Navier-Stokes (RANS) based methods in that they only involve modeling of the relatively universal subscale motion and not the ...
NASA Center: Glenn Research Center
Publication Year: 2006
Added to NTRS: 2007-06-26
Document ID: 20060051735
A Sub-filter Scale Noise Equation far Hybrid LES Simulations
Author(s): Goldstein, Marvin E.
Abstract: Hybrid LES/subscale modeling approaches have an important advantage over the current noise prediction methods in that they only involve modeling of the relatively universal subscale motion and not the configuration dependent ...
NASA Center: Glenn Research Center
Publication Year: 2006
Added to NTRS: 2006-08-02
Document ID: 20060013418
Aeroacoustics of subsonic turbulent shear flows
Author(s): Goldstein, Marvin E.
Abstract: Sound generation in turbulent shear flows is examined. The emphasis is on simultaneous calculation of the turbulent flow along with the resulting sound generation rather than the alternative acoustic analogy approach. The ...
NASA Center: Glenn Research Center
Publication Year: 1987
Added to NTRS: 2005-10-13
Accession Number: 87N26615; Document ID: 19870017182; Report Number: E-3730, NAS 1.15:100165, NASA-TM-100165
Nonlinear instability of a uni-directional transversely sheared mean flow
Author(s): Wundrow, David W.; Goldstein, Marvin E.
Abstract: It is well known that the presence of a weak cross flow in an otherwise two-dimensional shear flow results in a spanwise variation in the mean streamwise velocity profile that can lead to an amplification of certain ...
NASA Center: Glenn Research Center
Publication Year: 1994
Added to NTRS: 2005-08-25
Accession Number: 95N15969; Document ID: 19950009554; Report Number: E-9232, NAS 1.15:106779, NASA-TM-106779
The Role of Instability Waves in Predicting Jet Noise
Author(s): Goldstein, Marvin E.; Handler, Louis M.
Abstract: Debate over whether linear instability waves play a role in the prediction of jet noise has been going on for many years. Parallel mean flow models, such as the one proposed by Lilley, usually neglect these waves because ...
NASA Center: Glenn Research Center
Publication Year: 2003
Added to NTRS: 2005-08-25
Document ID: 20030068092; Report Number: AIAA Paper 2003-3256, E-13892, NAS 1.15:212461, NASA/TM-2003-212461
On the Environmental Realizability of Algebraically Growing Disturbances and Their Relation to Klebanoff Modes
Author(s): Goldstein, Marvin E.; Wundrow, David W.
Abstract: A theoretical explanation of some experimentally observed phenomena associated with the so-called Klebanoff modes is obtained by analyzing the flow over a finite thickness flat plate resulting from a small-amplitude ...
NASA Center: Glenn Research Center
Publication Year: 1998
Added to NTRS: 2005-08-25
Document ID: 19980017493; Report Number: E-10995, NAS 1.15:206298, NASA/TM-1998-206298
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