Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Milo D. Dahl"'
Autor:
Daniel L. Sutliff, Milo D. Dahl
Publikováno v:
International Journal of Aeroacoustics. 15:430-461
The NASA Glenn Research Center’s rotating rake mode measurement system has been successful in measuring the modal content propagating in hard-wall ducts. This paper proposes an extension of the rotating rake measurement and analysis technique to tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de47b9e53dbf15be8361a526bc020818
https://doi.org/10.1177/1475472x16642135
https://doi.org/10.1177/1475472x16642135
Autor:
Milo D. Dahl
Publikováno v:
International Journal of Aeroacoustics. 14:521-552
Time-resolved, particle image velocimetry was used to measure the velocity fluctuation field at three locations along the lipline of two subsonic jets. The time history data within these fields were filtered in the time domain using empirical mode de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f40352a84fe9b78a6eebe70e3987acc9
https://doi.org/10.1260/1475-472x.14.3-4.521
https://doi.org/10.1260/1475-472x.14.3-4.521
Autor:
Duane R. Hixon, Milo D. Dahl
Publikováno v:
22nd AIAA/CEAS Aeroacoustics Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56596c6bc5ddfe97ea751b431765a02b
https://doi.org/10.2514/6.2016-2856
https://doi.org/10.2514/6.2016-2856
Autor:
Milo D. Dahl, K. B. M. Q. Zaman
Publikováno v:
AIAA Journal. 45:2661-2670
The issue of scaling of noise as well as spreading of subsonic coannular jets is revisited. Far-field noise and centerline Pitot-static pressure surveys are conducted with concentric, circular nozzles having an outer-to-inner diameter ratio of 1.42.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8e6e3973b312e402f0d6aef5a28db8a
https://doi.org/10.2514/1.29441
https://doi.org/10.2514/1.29441
Autor:
Duane R. Hixon, Milo D. Dahl
Publikováno v:
21st AIAA/CEAS Aeroacoustics Conference.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17c79f196c7737b9c78269a87add661b
https://doi.org/10.2514/6.2015-2524
https://doi.org/10.2514/6.2015-2524
Autor:
Daniel L. Sutliff, Milo D. Dahl
Publikováno v:
20th AIAA/CEAS Aeroacoustics Conference.
The Rotating Rake mode measurement system was designed to measure acoustic duct modes generated by a fan stage. Initially, the mode amplitudes and phases were quantified from a single rake measurement at one axial location. To directly measure the mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db57ed6d770c2a9f5162656329adece2
https://doi.org/10.2514/6.2014-3316
https://doi.org/10.2514/6.2014-3316
Autor:
Milo D. Dahl, Dimitri Papamoschou
Publikováno v:
AIAA Journal. 38:584-591
The noise radiated from perfectly expanded coaxial jets was measured in an anechoic chamber for operating conditions with the same total mass flow and thrust and with the same temperature ratio. The shape of the measured noise spectrum at different a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc6eed4e6f65668bfc5a4873e8f4b961
https://doi.org/10.2514/3.14448
https://doi.org/10.2514/3.14448
Autor:
Philip J. Morris, Milo D. Dahl
Publikováno v:
Journal of Fluids Engineering. 120:471-476
In this paper, predictions are made of noise radiation from single, supersonic, axisymmetric jets. We examine the effects of changes in operating conditions and the effects of simulated enhanced mixing that would increase the spreading rate of the je
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be1051d63e88c834330748bce7594b4d
https://doi.org/10.1115/1.2820686
https://doi.org/10.1115/1.2820686
Autor:
Milo D. Dahl, Jacob A. Sharpe
Publikováno v:
52nd Aerospace Sciences Meeting.
A code for predicting supersonic jet broadband shock-associated noise was assessed using a database containing noise measurements of a jet issuing from a convergent nozzle. The jet was operated at 24 conditions covering six fully expanded Mach number
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbf96c3b4d54fb390d5c9933b994635d
https://doi.org/10.2514/6.2014-0176
https://doi.org/10.2514/6.2014-0176
Autor:
Philip J. Morris, Milo D. Dahl
Publikováno v:
Journal of Sound and Vibration. 200:701-719
The instability wave noise generation model is used to study the instability waves in the two shear layers of an inverted velocity profile, supersonic, coaxial jet and the noise radiated from the dominant wave. The inverted velocity profile jet has a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfbead9acbf65f5a1b9cc2cd64c5faad
https://doi.org/10.1006/jsvi.1996.0725
https://doi.org/10.1006/jsvi.1996.0725