Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Lothar Rukes"'
Publikováno v:
European Journal of Mechanics - B/Fluids. 65:98-106
Swirling jets undergoing vortex breakdown are dominated by a strong coherent structure that is characterized by a precessing vortex core and the large-scale roll-up of the shear layers. These fully synchronized flow dynamics play an important role fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1bdf214025341eaf81fc356149f6fb0
https://doi.org/10.1016/j.euromechflu.2017.02.010
https://doi.org/10.1016/j.euromechflu.2017.02.010
Publikováno v:
European Journal of Mechanics - B/Fluids. 59:205-218
Linear stability analysis has proven to be a useful tool in the analysis of dominant coherent structures, such as the von K\'{a}rm\'{a}n vortex street and the global spiral mode associated with the vortex breakdown of swirling jets. In recent years,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6016cab69bccd923782d89b7f7165c6
https://doi.org/10.1016/j.euromechflu.2016.05.004
https://doi.org/10.1016/j.euromechflu.2016.05.004
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:
Journal of Fluid Mechanics. 757:1-32
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 nati
This publication is with permission of the rights owner freely accessible due to an Alliance licence and a nati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9ca765cf0f6cde71dc04993e9135546
https://doi.org/10.1017/jfm.2014.472
https://doi.org/10.1017/jfm.2014.472
Publikováno v:
Volume 4A: Combustion, Fuels and Emissions.
Swirling jets undergoing vortex breakdown are widely used in combustion applications, due to their ability to provide aerodynamic flame stabilization. It is well known that vortex breakdown is accompanied by a dominant coherent structure, the so call
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fc8d07b39a193027a8e57fd8c816692
https://doi.org/10.1115/gt2016-56588
https://doi.org/10.1115/gt2016-56588
This study investigates the dynamics of non-isothermal swirling jets undergoing vortex breakdown, with an emphasis on helical coherent structures. It is proposed that the dominant helical coherent structure can be suppressed by heating the recirculat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8b4ced2b86be732ddcf25241a4bdb9e
Publikováno v:
Experiments in Fluids. 56
This study investigates the sensitivity to initial conditions of swirling jets undergoing vortex breakdown. Emphasis is placed on the recirculation bubble and on the helical coherent structures that evolve in its periphery. It is proposed that the vo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c69bd982b200601b2a0f845353c4d036
https://doi.org/10.1007/s00348-015-2066-8
https://doi.org/10.1007/s00348-015-2066-8
The influence of the inner shear layer on the suppression of the global mode in heated swirling jets
Autor:
Moritz Sieber, Christian Oliver Paschereit, Kilian Oberleithner, Christian Navid Nayeri, Lothar Rukes
Publikováno v:
53rd AIAA Aerospace Sciences Meeting.
The vast majority of modern gas turbines employ swirling jets undergoing vortex breakdown in their burners. Usually, the vortex breakdown is accompanied by a large scale coherent structure, the so called global mode. It is known that under isothermal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79a7d3fd4b995a9c11c6b65d8a5f6111
https://doi.org/10.2514/6.2015-0302
https://doi.org/10.2514/6.2015-0302
Autor:
Lothar Rukes, Christina Schrödinger, Steffen Terhaar, Kilian Oberleithner, Christian Oliver Paschereit, Thoralf G. Reichel
Publikováno v:
Scopus-Elsevier
Strongly swirling flows are used in the vast majority of gas turbine combustors. The complex flow field downstream of the vortex breakdown provides good flame stabilization but is also prone to self-excited large scale hydrodynamic instabilities. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::830b55c519763b0e0c9f410c81053b9f
https://doi.org/10.2514/6.2013-2602
https://doi.org/10.2514/6.2013-2602
Publikováno v:
Volume 1B: Combustion, Fuels and Emissions.
Isothermal swirling jets undergoing vortex breakdown are known to be susceptible to self-excited flow oscillations. They manifest in a precessing vortex core and synchronized growth of large-scale vortical structures. Recent theoretical studies assoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20ba988d702fad05581bf4b64a81503c
https://doi.org/10.1115/gt2013-95509
https://doi.org/10.1115/gt2013-95509