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Short Helical Combustor: Concept Study of an Innovative Gas Turbine Combustor

Ariatabar, B. 1; Koch, R. 1; Bauer, H.-J.
1 Institut für Thermische Strömungsmaschinen (ITS), Karlsruher Institut für Technologie (KIT)


An innovative design of a gas turbine annular combustor is investigated analytically and numerically. Its principal feature is the helical arrangement of the burners around the turbine shaft.
Hence, a shorter combustor with lower aerodynamical losses and cooling air demand might be realized. A generic model of the combustor is developed and analyzed by means of a parametric study.
Scaling laws for the geometry of the flame tube and the burners are derived. Thereby, the relevant similarity parameters for fluid flow, combustion and heat transfer are maintained constant. Subsequently, non-reacting and reacting flow regimes of selected design variants are numerically investigated.
It is shown that a double annular configuration with a tilting angle of β = 45° , where circumferentially adjacent swirls are co-rotating and radially are counter-rotating, is the superior design in terms of:
1. Maintaining the relevant similarity rules.
2. Size and location of the recirculation zones and swirl flames.
3. Flow pattern at the combustor exit.
The deflection angle of the NGV as well as the axial length of such a Short Helical Combustor could be reduced by approx. ... mehr

DOI: 10.1115/GT2015-42963
Zitationen: 2
Zitationen: 1
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2015
Sprache Englisch
Identifikator ISBN: 978-0-7918-5668-0
KITopen-ID: 1000073635
Erschienen in ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, Montreal, Quebec, Canada, 15 - 19, 2015, Montreal, Quebec, Canada. Vol. 4 (Teil A): Combustion, fuels and emissions
Verlag The American Society of Mechanical Engineers (ASME)
Seiten V04AT04A071
Nachgewiesen in Scopus
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