Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Steffen TERHAAR"'
Publikováno v:
Journal of Fluid Science and Technology, Vol 9, Iss 3, Pp JFST0024-JFST0024 (2014)
This paper presents recent research activities on coherent structures in combustor flows employing linear hydrodynamic stability theory. Large-scale coherent structures play an important role in swirling combustor flows. On the one hand isothermal sw
Externí odkaz:
https://doaj.org/article/38640c455992435aa672b72c7e382cc8
Publikováno v:
Journal of Fluid Science and Technology, Vol 9, Iss 3, Pp JFST0040-JFST0040 (2014)
The addition of steam to the combustion process is a promising avenue, in order to reduce harmful emissions and simultaneously increase the efficiency. In contrast to traditional flames where the heat release exhibits a thin flame front, operating un
Externí odkaz:
https://doaj.org/article/d33bd00ac41f47c6ba64215e4c689994
Publikováno v:
Journal of Engineering for Gas Turbines and Power. 143
Lean premixed gas turbulent flames stabilized in the flow generated by an industrial swirl burner with a central bluff body are experimentally found to behave bi-stable. This bi-stable behaviour, which can be triggered via a small change in some of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a96a6e2d3f91dc27d11ecc423234234
https://doi.org/10.1115/1.4048977
https://doi.org/10.1115/1.4048977
Publikováno v:
Journal of Propulsion and Power. 34:690-701
To prevent flame flashback in swirl-stabilized, lean premixed combustion, a nonswirling air jet is introduced on the central axis of the radial swirl generator. This axial injection of air alters t...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f3c7b79f828217e941327d1c9bfe415
https://doi.org/10.2514/1.b36646
https://doi.org/10.2514/1.b36646
Publikováno v:
Combustion and Flame. 172:234-251
Swirl-stabilized flames can feature a self-excited hydrodynamic instability known as the precessing vortex core (PVC). In the present study it is shown how this instability is affected by axisymmetric acoustic velocity fluctuations as encountered at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89bd1663e28c9456484189cd8d15ae0a
https://doi.org/10.1016/j.combustflame.2016.06.013
https://doi.org/10.1016/j.combustflame.2016.06.013
Publikováno v:
Combustion and Flame. 162:1046-1062
The flame describing function is a valuable tool for the limit-cycle prediction of thermoacoustic instabilities, which are frequently observed in modern gas turbines. In these applications, flames are of lean partially premixed type, and their unstea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e4744daccbbd4ae09a43c0e7adfaef4
https://doi.org/10.1016/j.combustflame.2014.09.025
https://doi.org/10.1016/j.combustflame.2014.09.025
Publikováno v:
Journal of Sound and Vibration. 335:1-18
Thermoacoustic instabilities are high amplitude instabilities of premixed gas turbine combustors. Cooled passive dampers are used to attenuate or suppress these instabilities in the combustion chamber. For the first time, the influence of temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ff407eadf2a43f52cd9d2283a9fdd81
https://doi.org/10.1016/j.jsv.2014.08.025
https://doi.org/10.1016/j.jsv.2014.08.025
Autor:
Kilian Oberleithner, Steffen Terhaar, Thoralf G. Reichel, Lothar Rukes, Christian Oliver Paschereit, Christina Schrödinger
Publikováno v:
Journal of Propulsion and Power. 31:219-229
This paper presents the results of a combined experimental, numerical, and analytical study of the occurrence of different vortex breakdown types and helical instabilities in realistic swirling combustor flows with axial air injection through a cente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ccb407c7650dff24743baaf0ff57267
https://doi.org/10.2514/1.b35217
https://doi.org/10.2514/1.b35217
Publikováno v:
Proceedings of the Combustion Institute. 35:3347-3354
This report deals with an experimental and analytical study of the occurrence of self-excited hydrodynamic instabilities in swirling combustor flows. Different flow field types are measured for varying combustor operating conditions using stereoscopi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80b6cdaee9eb460a9949858561185ffd
https://doi.org/10.1016/j.proci.2014.07.035
https://doi.org/10.1016/j.proci.2014.07.035
Publikováno v:
Combustion Science and Technology. 186:889-911
Humidified gas turbines and steam-injected gas turbines are promising technologies to lower the emissions and increase the efficiency and fuel flexibility of gas turbines. In the current study, the influence of steam-dilution on swirl-stabilized meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b2da52891c32c8b9727221f6bd7d9fe
https://doi.org/10.1080/00102202.2014.890597
https://doi.org/10.1080/00102202.2014.890597