Abstract

With the advancement of modern fan architectures, the lack of experimental benchmarks for the research community became apparent in the recent years. Enormous effort in the method development could not be validated on representative geometries and motivated the development of the open-test-case ECL5/CATANA. A carbon fiber fan stage has been designed by Ecole Centrale de Lyon and shared with the community in 2021. The fan is representative of a modern ultra high bypass ratio (UHBR) architecture with sonic design speed. The reference configuration has been investigated experimentally on a novel test facility with multiphysical instrumentation. In this publication, the results of the first experimental campaign are presented with a detailed analysis of the aerodynamic performance and system symmetry. The presented results comprise full stage mappings across the whole operating range for three main speedlines (55%, 80%, and 100%) using performance rakes, unsteady wall pressure arrays, tip clearance, and stagger angle measurements. Radial profiles of intake boundary layer and rotor exit conditions at selected conditions complete the full validation dataset for steady and unsteady aerodynamic simulations. Results are discussed in comparison to blind-test Reynolds-averaged Navier–Stokes (RANS) simulations of different international institutes. Significant prediction inaccuracies of the tip flow and corner separations of the stator are observed and reveal the requirement of real blade geometry measurements at running conditions. This article is accompanied by a publication with a focus on aeroelastic instabilities observed near the stability limit. The results represent a comprehensive dimensional benchmark dataset and allow method validation on multiple levels of fidelity for the aerodynamic and aeroelastic research community.

References

1.
Peters
,
A.
,
Spakovszky
,
Z. S.
,
Lord
,
W. K.
, and
Rose
,
B.
,
2014
, “
Ultra-Short Nacelles for Low Fan Pressure Ratio Propulsors
,”
Proceedings ASME Turbo
,
Dusseldorf, Germany
,
June 16–20
, Paper No. GT2014-26369.
2.
Wilson
,
M. J.
,
Imregun
,
M.
, and
Sayma
,
A. I.
,
2006
, “
The Effect of Stagger Variability in Gas Turbine Fan Assemblies
,”
ASME J. Turbomach.
,
129
(
2
), pp.
404
411
.
3.
Lu
,
Y.
,
Lad
,
B.
,
Green
,
J.
,
Stapelfeldt
,
S.
, and
Vahdati
,
M.
,
2019
, “
Effect of Geometry Variability on Transonic Fan Blade Untwist
,”
Int. J. Turbomach. Propulsion Power
,
4
(
3
), p.
24
.
4.
Pages
,
V.
,
Duquesne
,
P.
,
Aubert
,
S.
,
Blanc
,
L.
,
Ferrand
,
P.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2022
, “
UHBR Open-Test-Case Fan ECL5/CATANA
,”
Int. J. Turbomach. Propulsion Power
,
7
(
2
), p.
17
.
5.
Eggers
,
T.
,
Friedrichs
,
J.
,
Goessling
,
J.
,
Seume
,
J. R.
,
Natale
,
N.
,
Flüh
,
J.
, and
Paletta
,
N.
,
2021
, “
Composite UHBR Fan for Forced Response and Flutter Investigations
,”
Proceedings ASME Turbo Expo
,
Virtual
,
June 7–11
, Paper No. GT2021-58941.
6.
Brandstetter
,
C.
,
Pages
,
V.
,
Duquesne
,
P.
,
Ottavy
,
X.
,
Ferrand
,
P.
,
Aubert
,
S.
, and
Blanc
,
L.
,
2021
, “
UHBR Open-Test-Case Fan ECL5/CATANA, Part 1 : Geometry and Aerodynamic Performance
,”
Proceedings of ETC14
,
Gransk, Poland
,
Apr. 12–16
, Paper No. ETC2021-626.
7.
Pages
,
V.
,
Duquesne
,
P.
,
Ottavy
,
X.
,
Ferrand
,
P.
,
Aubert
,
S.
,
Blanc
,
L.
, and
Brandstetter
,
C.
,
2021
, “
UHBR Open-Test-Case Fan ECL5/CATANA, Part 2: Mechanical and Aeroelastic Stability Analysis
,”
Proceedings of ETC14
,
Gransk, Poland
,
Apr. 12–16
, Paper No. ETC2021-625.
8.
Fiquet
,
A.-L.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2022
, “
UHBR Open-Test-Case Fan ECL5/CATANA: Non-linear Analysis of Non-synchronous Blade Vibration at Part-Speed Condtions
,”
Proceedings of ISUAAAT16
,
Toledo, Spain
,
Sept. 19–23
, Paper No. ISUAAAT16-064.
9.
Kielb
,
R. E.
,
Barter
,
J. W.
,
Thomas
,
J. P.
, and
Hall
,
K. C.
,
2003
, “
Blade Excitation by Aerodynamic Instabilities: A Compressor Blade Study
,”
Proceedings of ASME Turbo Expo
,
Atlanta, GA
,
June 16–19
, pp.
399
406
.
10.
Brandstetter
,
C.
,
Juengst
,
M.
, and
Schiffer
,
H.-P.
,
2018
, “
Measurements of Radial Vortices, Spill Forward, and Vortex Breakdown in a Transonic Compressor
,”
ASME J. Turbomach.
,
140
(
6
), p.
061004
.
11.
Rodrigues
,
M.
,
Soulat
,
L.
,
Paoletti
,
B.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2021
, “
Aerodynamic Investigation of a Composite Low-Speed Fan for UHBR Application
,”
ASME J. Turbomach.
,
143
(
10
), p.
101004
.
12.
Schneider
,
A.
,
Paoletti
,
B.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2022
, “
Influence of a Turbulence Control Screen on the Aerodynamic and Aeroelastic Behavior of a Uhbr Fan
,”
Proceedings of ASME Turbo Expo 2022
,
Rotterdam, The Netherlands
,
June 13–17
, Paper No. GT2022-81961.
13.
Stapelfeldt
,
S.
, and
Brandstetter
,
C.
,
2020
, “
Non-synchronous Vibration in Axial Compressors: Lock-In Mechanism and Semi-analytical Model
,”
J. Sound Vibration
,
488
, p.
115649
.
14.
Brandstetter
,
C.
, and
Stapelfeldt
,
S.
,
2021
, “
Analysis of a Linear Model for Non-synchronous Vibrations Near Stall
,”
Int. J. Turbomach. Propulsion Power
,
6
(
3
), p.
26
.
15.
Al-Am
,
J.
,
Clair
,
V.
,
Giauque
,
A.
, and
Boudet
,
J.
,
2021
, “
A Parametric Study on the LES Numerical Setup to Investigate Fan/OGV Broadband Noise
,”
Int. J. Turbomachinery, Propulsion Power
,
6
(
2
), p.
12
.
16.
Al-Am
,
J.
,
Clair
,
V.
,
Giauque
,
A.
, and
Boudet
,
J.
,
2022
, “
Direct Noise Predictions of Fan Broadband Noise Using LES and Analytical Models
,”
28th AIAA/CEAS Aeroacoustics 2022 Conference
,
Southampton, UK
,
June 14–17
.
17.
Tucker
,
P. G.
, and
Tyacke
,
J. C.
,
2016
, “
Eddy Resolving Simulations in Aerospace – Invited Paper (Numerical Fluid 2014)
,”
Appl. Math. Comput.
,
272
(Part 3), pp.
582
592
.
18.
Bode
,
C.
,
Przytarski
,
P.
,
Leggett
,
J.
, and
Sandberg
,
R. D.
,
2022
, “
Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section Part I: Effect of Inflow Disturbances
,”
Proceedings of ASME Turbo Expo 2022
,
Rotterdam, The Netherlands
,
June 13–17
, Paper No. GT2022-81673.
19.
Bode
,
C.
,
Przytarski
,
P.
,
Leggett
,
J.
, and
Sandberg
,
R. D.
,
2022
, “
Highly Resolved Large-Eddy Simulations of a Transonic Compressor Stage Midspan Section Part II: Effect of Rotor-Stator Gap
,”
Proceedings of ASME Turbo Expo 2022
,
Rotterdam, The Netherlands
,
June 13–17
, Paper No. GT2022-82474.
20.
Brandstetter
,
C.
,
Pages
,
V.
,
Duquesne
,
P.
,
Paoletti
,
B.
,
Aubert
,
S.
, and
Ottavy
,
X.
,
2019
, “
Project PHARE-2: A High-Speed UHBR Fan Test Facility for a New Open-Test Case
,”
ASME J. Turbomach.
,
141
(
10
), p.
101004
.
21.
Lu
,
Y.
,
Lad
,
B.
, and
Vahdati
,
M.
,
2021
, “
Transonic Fan Blade Redesign Approach to Attenuate Nonsynchronous Vibration
,”
ASME J. Eng. Gas Turbines Power
,
143
(
7
), p.
71007
.
22.
Fiquet
,
A.-L.
,
Schneider
,
A.
,
Paoletti
,
B.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2024
, “
Experiments on Tuned UHBR Open-Test-Case Fan ECL5/CATANA: Stability Limit
,”
ASME J. Eng. Gas Turbines Power
,
146
(
5
), p.
051011
.
23.
Cox
,
R. N.
,
1957
, “
Wall Neighbourhood Measurements in Turbulent Boundary Layers Using a Hot Wire Anemometer
,”
Aeronautical Research Council
,
Report No. 19101
.
24.
Pages
,
V.
,
2021
, “
Conception du Fan UHBR ECL5 Pour une Analyse Des Mecanismes d’interactions Multi-physiques a L’origine du Flottement
,” Ph.D. thesis,
Ecole Centrale de Lyon
, France.
25.
Cambier
,
L.
,
Heib
,
S.
, and
Plot
,
S.
,
2013
, “
The Onera ElsA CFD Software: Input From Research and Feedback From Industry
,”
Mech. Ind.
,
14
(
3
), pp.
159
174
.
26.
Taylor
,
J. V.
,
2019
, “
Separated Flow Topology in Compressors
,”
ASME J. Turbomach.
,
141
(
9
), p.
091014
.
27.
Gbadebo
,
S. A.
,
Cumpsty
,
N. A.
, and
Hynes
,
T. P.
,
2005
, “
Three-Dimensional Separations in Axial Compressors
,”
ASME J. Turbomach.
,
127
(
2
), pp.
331
339
.
28.
Liu
,
Y.
,
Tang
,
Y.
,
Scillitoe
,
A. D.
, and
Tucker
,
P. G.
,
2020
, “
Modification of Shear Stress Transport Turbulence Model Using Helicity for Prediction Corner Separation Flow in a Linear Compressor Cascade
,”
ASME J. Turbomach.
,
142
(
2
), p.
21004
.
29.
Denton
,
J. D.
,
2010
, “
Some Limitations of Turbomachinery CFD
,”
Proceedings of ASME Turbo
,
Glasgow, UK
,
June 14–18
, Paper No. GT2012-22540.
30.
Fiquet
,
A.-L.
,
Ottavy
,
X.
, and
Brandstetter
,
C.
,
2022
, “
UHBR Open-Test-Case Fan ECL5/CATANA: Numerical Investigation Near The Stability Limit Including Aerodynamic Mistuning
,”
Proceedings of ASME Turbo Expo 2022
,
Rotterdam, The Netherlands
,
June 13–17
, Paper No. GT2022-77992.
31.
Brandstetter
,
C.
,
Kegalj
,
M.
,
Wartzek
,
F.
,
Heinichen
,
F.
, and
Schiffer
,
H.-P.
,
2014
, “
Stereo PIV Measurement of Flow Structures Underneath an Axial-Slot Casing Treatment on a One and a Half Stage Transonic Compressor
,”
Proceedings of 17th International Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics
,
Lisbon, Portugal
,
July 7–10
.
32.
Moreau
,
A.
,
2017
, “
A Unified Analytical Approach for the Acoustic Conceptual Design of Fans of Modern Aero-Engines
,” Ph.D. thesis,
Technical University of Berlin and DLR
, DLR Internal Report.
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