Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Wolfgang Neise"'
Autor:
Olaf Wiederhold, Rudibert King, Lars Neuhaus, Lars Enghardt, Bernd R. Noack, Wolfgang Neise, Marius Swoboda
Publikováno v:
AIAA Journal. 49:1429-1436
An adaptive control strategy is implemented in a single-input/single-output experiment to improve the aerodynamic performance of an axial turbofan. Pulsed blowing into the blade tip region is used to prevent flow separation. A slope-seeking control a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ff83a20a59764be36848e2f252733690
https://doi.org/10.2514/1.j050702
https://doi.org/10.2514/1.j050702
Publikováno v:
International Journal of Aeroacoustics. 6:31-43
In conventional active noise control experiments, loudspeakers are used to generate the secondary anti-phase sound field to be superimposed destructively with the sound waves radiated from the primary source. In the present study, aerodynamic sound s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e6aabf4199e557b5ea52185a827f05a
https://doi.org/10.1260/147547207780440776
https://doi.org/10.1260/147547207780440776
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy. 217:375-383
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich. This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba8b6161e31f2b9c2bc68bb1ad46264f
https://doi.org/10.1243/095765003322315432
https://doi.org/10.1243/095765003322315432
Autor:
Wolfgang Neise, Karl-Richard Fehse
Publikováno v:
European Journal of Mechanics - B/Fluids. 19:637-652
The sound field in a circular pipe generated by a concentric jet flow entering the pipe is studied. In the first case the air flow enters the pipe through a convergent nozzle only. In the second case a short diffuser is attached to the nozzle. When t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b976b44f9243e910c9f4570821d7bd1
https://doi.org/10.1016/s0997-7546(00)00114-x
https://doi.org/10.1016/s0997-7546(00)00114-x
Autor:
K.-R. Fehse, Wolfgang Neise
Publikováno v:
AIAA Journal. 37:1173-1179
Earlier investigations by Stahl & Argiiello (1986), who studied the sound field in a circular duct generated by a jet flow, indicated that flow separation occurring in a diffuser attached to the jet nozzle leads to increased sound levels in the low f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66e74001a27d703e3fa14176b11c863b
https://doi.org/10.2514/3.14306
https://doi.org/10.2514/3.14306
Autor:
F. Kameier, Wolfgang Neise
Publikováno v:
Journal of Turbomachinery. 119:460-471
An experimental study is described to investigate the negative effects of the tip clearance gap on the aerodynamic and acoustic performance of axial turbomachines. In addition to the increased broadband levels reported in the literature when the tip
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b17e62ba6a5c119a69a5e33a0db2b82c
https://doi.org/10.1115/1.2841145
https://doi.org/10.1115/1.2841145
Publikováno v:
Active Flow Control II ISBN: 9783642117343
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17e5fc1f42af94300f257f601c21be1e
https://doi.org/10.1007/978-3-642-11735-0_10
https://doi.org/10.1007/978-3-642-11735-0_10
Extensions of Extremum-Seeking Control to Improve the Aerodynamic Performance of Axial Turbomachines
Autor:
Lars Enghardt, Lars Neuhaus, Olaf Wiederhold, Bernd R. Noack, Wolfgang Neise, Marius Swoboda, Rudibert King
Publikováno v:
Scopus-Elsevier
Different extremum-seeking control methods are applied to a high pressure axial fan in order to reduce flow separation and increase the pressure ratio via injection of a pulsed air stream. To improve the control performance the plain SISO-extremum co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::925afada6ad4085b173ad2e7f5f2ef23
https://doi.org/10.2514/6.2009-4175
https://doi.org/10.2514/6.2009-4175
Control of Tonal Fan Noise Using Flow Induced Secondary Sound Sources Generated by Air Jet Actuation
Publikováno v:
15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference).
To reduce the tonal noise of axial fans loudspeakers are typically used to generate the required anti-phase sound field. The space requirement and the weight of the loudspeakers inhibit practical application of this method. In the present study the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb2b160b51b922e55f825bafa058f678
https://doi.org/10.2514/6.2009-3227
https://doi.org/10.2514/6.2009-3227
Autor:
Wolfgang Neise
Publikováno v:
Messtechnik der Akustik ISBN: 9783540680864
In vielen technischen Prozessen spielen bewegte Medien, Stromungen, eine wichtige oder die entscheidende Rolle, und fast immer stellt das von den Stromungsvorg angen erzeugte Gerausch ein gravierendes Problem dar. Es besteht also die Notwendigkeit, s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e30064d6e148aba574cb012e6cc87ef6
https://doi.org/10.1007/978-3-540-68087-1_12
https://doi.org/10.1007/978-3-540-68087-1_12