Experimental and Numerical Flow Analysis of an Engine-Realistic State-of-the-Art Turbine Rear Structure
Artikel i vetenskaplig tidskrift, 2022
This paper presents experimental and numerical CFD studies of the aerodynamics of a turbine rear structure (TRS). The TRS test geometry is an engine-realistic state-of-the-art design with a polygonal outer case, recessed engine mount bumps, and three different vane types: regular vanes, bump vanes in bump sectors, and thick vanes. Using three different sector types simultaneously was found to be crucial for the inlet boundary conditions. Experiments were performed in a modern rotating test facility with an LPT stage upstream of the TRS. A Reynolds number of 350,000 was used, representative of a TRS in a narrow-body geared turbofan engine. The TRS performance was analyzed both at on- and off-design conditions and a thorough side-by-side comparison of CFD and experiments was performed. Static-pressure-distributions, turning and outlet flow-angles, wakes and losses, and surface-flow visualizations and outlet total pressure contours are presented. The thick vane showed good aerodynamic performance, similar to the regular vane. For the bump vane, the mount bumps were found to generate additional local separations and secondary flows, resulting in extra losses. In the regions with strong secondary flows CFD over-predicts the wakes, whereas the wakes around midspan, where secondary flows have a smaller influence, are predicted well
exit guide vane
Clean Sky 2 Joint Undertaking
outlet guide vane
turbine exhaust casing
experimental
CS2-RIA
European Union (EU)
bumps
polygonal shroud
Horizon 2020
engine mount recess
TRF
CFD
EATEEM
TBH
turbine rear frame
turbine rear structure
TEC
low-pressure turbine
tail bearing housing
821398
Författare
Valentin Vikhorev
Chalmers, Mekanik och maritima vetenskaper, Strömningslära
Pär Nylander
GKN Aerospace
Valery Chernoray
Chalmers, Mekanik och maritima vetenskaper, Strömningslära
Jonas Larsson
GKN Aerospace
Oskar Thulin
GKN Aerospace
Journal of Engineering for Gas Turbines and Power
0742-4795 (ISSN) 1528-8919 (eISSN)
Vol. 144 7 071009Experimentell aerotermisk studie av nästa generations flygmotorkomponenter
Europeiska kommissionen (EU) (EC/H2020/821398), 2018-10-01 -- 2021-03-31.
Drivkrafter
Hållbar utveckling
Innovation och entreprenörskap
Styrkeområden
Transport
Ämneskategorier (SSIF 2011)
Rymd- och flygteknik
Teknisk mekanik
Strömningsmekanik och akustik
Fundament
Grundläggande vetenskaper
Infrastruktur
Chalmers strömningslaboratorium
DOI
10.1115/1.4054075