NUMERICAL INVESTIGATION OF HEAT TRANSFER IN THE GTE BEARING CHAMBER

Дуаиссиа Омар Хадж Аисса

Abstract


To determine the required oil pumping through the GTE rotor support, an accurate calculation of the heat flow from the engine to the GTE bearing chamber is necessary. The complexity of the mathematical description of thermo-hydraulic processes is associated with the presence of a multiphase mixture in the bearing chamber, consisting of oil, going for lubrication and cooling of the support elements, and air, used for seals pressurization. The work is devoted to the issues of numerical study of the effect of regime parameters on the heat transfer coefficient in the bearing chamber of the GTE. For these purposes, the methodology based on conservation laws and CFD modeling methods is applied. The change in the heat transfer coefficient in the characteristic sections of the chamber is considered. The influence of the oil film distribution around the circumference of the chamber is shown.


Keywords


gas turbine engine; regime parameters; heat transfer coefficient; heat flux; rotor support; bearing chamber; CFD-simulation

References


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Wolfram Kurz, Klaus Dullenkopf and Hans-Jörg Bauer. Influences on the Oil Split Between the Offtakes of an Aero-Engine Bearing Chamber. ASME Turbo Expo 2012: Turbine Technical Conference and Exposition Volume 4: Heat Transfer, Parts A and B Copenhagen, Denmark, June 11–15, 2012

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Wang, C, Morvan, H. P., Hibberd, S. and Cliffe, K. A. (2011), "Thin Film Model-ling For Aero-Engine Bearing Chambers", Vancouver, British Columbia, Canada, ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition, Vol. 1, pp. 1–10, ISBN 978-0-7918-5461-7.

Wolfram Kurz, Klaus Dullenkopf and Hans-Jörg Bauer. Influences on the Oil SplitBetween the Offtakes of an Aero-Engine Bearing Chamber. ASME Turbo Expo 2012: Turbine Technical Conference and Exposition Volume 4: Heat Transfer, Parts A and B Copenhagen, Denmark, June 11–15, 2012.




DOI: https://doi.org/10.32620/oikit.2018.81.10

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