ISABE-2015-22143.pdf (1.2 MB)
Aerodesign and validation of turning struts for an intermediate compressor duct
conference contribution
posted on 2015-10-19, 13:28 authored by Duncan WalkerDuncan Walker, Fredrik Wallin, Robin Bergstedt, Graham PeacockGraham PeacockCompressor transition ducts, also referred to as S-shaped ducts, are used to connect the low- or intermediate-pressure compressor (LPC) with the high-pressure compressor (HPC) in 2- and 3-spool turbofan engine configurations respectively. This paper focuses on studies on a concept which aims to shorten the compressor module by introducing aerodynamically lifting/turning struts in the compressor transition duct. This concept is labeled fully turning, as the struts in the duct assume the complete aerodynamic function of the last row of stators of the LPC. Through CFD analysis and low-speed experimental evaluation, this concept is further developed with promising results. It is shown that there is potential to reduce the length of the compressor module by 25% of the duct length through elimination of the last stator row in the LPC, whilst providing comparable or improved aerodynamic performance compared to a conventional configuration. This paper presents a combined experimental and numerical study where a fully turning concept (without LPC OGV, having 45 deg turning in the duct) is compared back-to-back with a moderately turning concept (with an off-loaded LPC OGV and 20 deg turning in the duct). Numerical analysis of a conventional duct configuration (where the OGV remains, with symmetrical non-turning struts) is used as baseline.
Funding
The financial support from EU FP7 under grant agreement n° 283216, LEMCOTEC is gratefully acknowledged.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Published in
The 22nd International Symposium on Air Breathing Engines (ISABE)Citation
WALKER, A.D. ...et al., 2015. Aerodesign and validation of turning struts for an intermediate compressor duct. IN: The 22nd International Symposium on Air Breathing Engines (ISABE), Phoenix, AZ, Oct. 25-30.Publisher
© American Institute of Aeronautics and AstronauticsVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This is a conference paper.Publisher version
Language
- en