Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Daniel J. Stead"'
Publikováno v:
AIAA Journal. 59:4598-4609
Two types of aeroacoustic wind-tunnel test section configurations have been tested in the NASA Langley Quiet Flow Facility. The first is a more traditional open-jet configuration, where test sectio...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e2424bd93c5dca68602e70bbfc6e8ae
https://doi.org/10.2514/1.j060469
https://doi.org/10.2514/1.j060469
Autor:
Christopher J. Bahr, Gary G. Podboy, Stephen D. Schery, William C. Horne, William M. Humphreys, Nathan J. Burnside, Daniel J. Stead
Publikováno v:
AIAA Scitech 2021 Forum.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::35c670f9d429898eb73424ebeeea3b1b
https://doi.org/10.2514/6.2021-0217
https://doi.org/10.2514/6.2021-0217
Publikováno v:
2018 AIAA/CEAS Aeroacoustics Conference.
Two types of aeroacoustic wind tunnel test section configurations have been tested in the NASA Langley Quiet Flow Facility. The first is a more traditional open-jet configuration, where test section flow passes unbounded through the facility anechoic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d13a4de8381ad560f6d2f6088fe2d9a
https://doi.org/10.2514/6.2018-3118
https://doi.org/10.2514/6.2018-3118
Publikováno v:
2018 AIAA/CEAS Aeroacoustics Conference.
The effects of sound source location, Mach number and angle of attack on the shielding of a laser-induced sound source by a NACA 0012 airfoil are examined. The sound source is a small plasma generated by a high energy, laser beam focused to a point.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e45f92646f9900d265e31f75ad7aa8d
https://doi.org/10.2514/6.2018-2821
https://doi.org/10.2514/6.2018-2821
Publikováno v:
22nd AIAA/CEAS Aeroacoustics Conference.
The effects of the interaction of a wake with a half-span flap on radiated noise are examined. The incident wake is generated by bars of various widths and lengths or by a simplified landing gear model. Single microphone and phased array measurements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88ea215ca869e051beeaff9595207d04
https://doi.org/10.2514/6.2016-2955
https://doi.org/10.2514/6.2016-2955
Publikováno v:
International Journal of Aeroacoustics. 11:675-700
An experimental study of the noise resulting from the interaction of an airfoil with incident turbulence is presented. The test models include NACA0015 airfoils of different chord lengths, a flat plate with a sharp leading edge, and an airfoil of sam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3adadbfd2f1a2599b526586a8165ba19
https://doi.org/10.1260/1475-472x.11.5-6.675
https://doi.org/10.1260/1475-472x.11.5-6.675
Autor:
Daniel J. Stead, Thomas F. Brooks, David P. Lockard, Florence V. Hutcheson, Meelan M. Choudhari
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
Acoustic and unsteady surface pressure measurements from two cylinders in tandem configurations were acquired to study the effect of spacing, surface trip and freestream velocity on the radiated noise. The Reynolds number ranged from 1.15x10(exp 5) t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd0fb46d7d1981ec87acaa3dec92ad3c
https://doi.org/10.2514/6.2014-2762
https://doi.org/10.2514/6.2014-2762
Autor:
Christopher J. Bahr, Casey L. Burley, Thomas F. Brooks, Florence V. Hutcheson, D. Stuart Pope, Daniel J. Stead
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
The results of an experimental study on the effects of engine placement and vertical tail configuration on shielding of exhaust broadband noise radiation are presented. This study is part of the high fidelity aeroacoustic test of a 5.8% scale Hybrid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa880481387691b7f8577292f7bc03a2
https://doi.org/10.2514/6.2014-2624
https://doi.org/10.2514/6.2014-2624
Autor:
Christopher J. Bahr, Taylor B. Spalt, William M. Humphreys, Thomas F. Brooks, Daniel J. Stead
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
An advanced vehicle concept, the HWB N2A-EXTE aircraft design, was tested in NASA Langley's 14- by 22-Foot Subsonic Wind Tunnel to study its acoustic characteristics for var- ious propulsion system installation and airframe con gurations. A signi can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30a040312aa73ac2a4b10c6e9fef74bd
https://doi.org/10.2514/6.2014-2345
https://doi.org/10.2514/6.2014-2345
Autor:
Daniel J. Stead, Thomas F. Brooks, Christopher J. Bahr, Taylor B. Spalt, Lawrence Becker, Gerald E. Plassman
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
Metrics of NASA Langley’s 14by 22-Foot Subsonic Tunnel in the acoustic configuration are provided. The background noise levels are given over a free-stream Mach number range of 0.11 to 0.23. Two room-acoustic tests were conducted: one in which spea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee23140feca6cd2d338bc85429724e2e
https://doi.org/10.2514/6.2014-2344
https://doi.org/10.2514/6.2014-2344