The design space of axial-flow compressors is restricted by stability issues. Different axial-type casing treatments (CTs) have shown their ability to enhance compressor stability and to influence efficiency. Casing treatments have proven to be effective, but there still is need for more detailed investigations and gain of understanding for the underlying flow mechanism. Casing treatments are known to have a multitude of effects on the near-casing 3D flow field. For transonic compressor rotors, these are more complex, as super- and subsonic flow regions alternate while interacting with the casing treatment. To derive design rules, it is important to quantify the influence of the casing treatment on the different tip flow phenomena. Designing a casing treatment in a way that it antagonizes only the deteriorating secondary flow effects can be seen as a method to enhance stability while increasing efficiency. The numerical studies are carried out on a tip-critical rotor of a 1.5-stage transonic axial compressor. The examined recirculating tip blowing casing treatment (TBCT) consists of a recirculating channel with an air off-take above the rotor and an injection nozzle in front of the rotor. The design and functioning of the casing treatment are influenced by various parameters. A variation of the geometry of the tip blowing, more specifically the nozzle aspect ratio, the axial position, or the tangential orientation of the injection port, was carried out to identify key levers. The tip blowing casing treatment is defined as a parameterized geometric model and is automatically meshed. A sensitivity analysis of the respective design parameters of the tip blowing is carried out on a single rotor row. Their impact on overall efficiency and their ability to improve stall margin are evaluated. The study is carried out using unsteady Reynolds-averaged Navier–Stokes (URANS) simulations.

References

References
1.
Guinet
,
C.
,
Streit
,
J. A.
,
Gümmer
,
V.
, and
Kau
,
H.-P.
,
2014
, “
Tip Gap Variation on a Transonic Rotor in the Presence of Tip Blowing
,”
ASME
Paper No. GT2014-25042.
2.
Streit
,
J. A.
,
Guinet
,
C.
,
Heinichen
,
F.
, and
Kau
,
H.-P.
,
2012
, “
Trading Excessive Stall Margin for Efficiency: An Alternative Approach to Axial-Slot Casing Treatments for Transonic Compressors
,” ISUAAAT, Tokyo, Japan, Sept. 11–14, pp.
s5
5
.
3.
Wilke
,
I.
,
2005
, “
Verdichterstabilisierung mit passiven Gehäusestrukturen: Eine numerische Analyse
,” Scientific research dissertation, Lehrstuhl für Flugantriebe, Technische Universität München, München, Germany.
4.
Müller
,
M. W.
,
2011
, “
Untersuchungen zum Einfluss von Gehäusestrukturierungen auf die Stabilität und die Leistungsdaten eines transsonischen Axialverdichters
,” Scientific research dissertation, Technische Universität München, Munich, Germany.
5.
Wilke
,
I.
, and
Kau
,
H.-P.
,
2002
, “
A Numerical Investigation of the Influence of Casing Treatments on the Tip Leakage Flow in a HPC Front Stage
,”
ASME
Paper No. GT2002-30642.
6.
Suder
,
K. L.
,
Hathaway
,
M. D.
,
Thorp
,
S. A.
,
Strazisar
,
A. J.
, and
Bright
,
M. B.
,
2000
, “
Compressor Stability Enhancement Using Discrete Tip Injection
,”
ASME J. Turbomach.
,
123
(
1
), pp.
14
23
.
7.
Khaleghi
,
H.
,
Teixeira
,
J. A.
,
Tousi
,
A. M.
, and
Boroomand
,
M.
,
2008
, “
Parametric Study of Injection Angle Effects on Stability Enhancement of Transonic Axial Compressors
,”
J. Propul. Power
,
24
(
5
), pp.
1100
1107
.
8.
Hathaway
,
M. D.
,
2002
, “
Self-Recirculating Casing Treatment Concept for Enhanced Compressor Performance
,”
ASME
Paper No. GT2002-30368.
9.
Greitzer
,
E. M.
,
Nikkanen
,
J. P.
,
Haddad
,
D. E.
,
Mazzawy
,
R. S.
, and
Joslyn
,
H. D.
,
1979
, “
A Fundamental Criterion for the Application of Rotor Casing Treatment
,”
ASME J. Fluids Eng.
,
101
(
2
), pp.
237
243
.
10.
Strazisar
,
A. J.
,
Bright
,
M. M.
,
Thorp
,
S.
,
Culley
,
D. E.
, and
Suder
,
K. L.
,
2004
, “
Compressor Stall Control Through Endwall Recirculation
,”
ASME
Paper No. GT2004-54295.
11.
Weigl
,
H. J.
,
Paduano
,
J.
,
Frechette
,
L.
,
Epstein
,
A.
,
Greitzer
,
E.
,
Bright
,
M.
, and
Strazisar
,
A.
,
1997
, “
Active Stabilization of Rotating Stall and Surge in a Transonic Single Stage Axial Compressor
,” Scientific research dissertation, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA.
12.
Spakovszky
,
Z.
,
Van Schalkwyk
,
C.
,
Weigl
,
H.
,
Paduano
,
J.
,
Suder
,
K.
, and
Bright
,
M.
,
1999
, “
Rotating Stall Control in a High-Speed Stage With Inlet Distortion—Part II: Circumferential Distortion
,”
ASME J. Turbomach.
,
121
(
3
), pp.
517
524
.
13.
Spakovszky
,
Z.
,
Weigl
,
H.
,
Paduano
,
J.
,
Van Schalkwyk
,
C.
,
Suder
,
K.
, and
Bright
,
M.
,
1999
, “
Rotating Stall Control in a High-Speed Stage With Inlet Distortion—Part I: Radial Distortion
,”
ASME J. Turbomach.
,
121
(
3
), pp.
510
516
.
14.
Hossein Khaleghi
,
J. A. T.
,
2010
, “
Numerical Study of Discrete Tip Injection in a Transonic Axial Compressor
,”
ASME
Paper No. GT2010-23608.
15.
Cassina
,
G.
,
Beheshti
,
B. H.
,
Kammerer
,
A.
, and
Abhari
,
R. S.
,
2007
, “
Parametric Study of Tip Injection in an Axial Flow Compressor Stage
,”
ASME
Paper No. GT2007-27403.
16.
Guinet
,
C.
,
Bettrich
,
V.
, and
Gümmer
,
V.
,
2014
, “
Parametric Study of the Bleed Position in a Tip Blowing Casing Treatment
,”
50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
,
Paper No. 3441
.
17.
Beheshti
,
B. H.
,
Ghorbanian
,
K.
,
Farhanieh
,
B.
,
Teixeira
,
J. A.
, and
Ivey
,
P. C.
,
2006
, “
A New Design for Tip Injection in Transonic Axial Compressors
,”
ASME
Paper No. GT2006-90007.
18.
Lapworth
,
B. L.
,
2004
, “
HYDRA-CFD: A Framework for Collaborative CFD Development
,” International Conference on Scientific and Engineering Computation (ICSEC), Singapore, June 30–July 2.
19.
Spalart
,
P. R.
, and
Allmaras
,
S. R.
,
1992
, “
A One-Equation Turbulence Model for Aerodynamic Flows
,”
AIAA
Paper No. 439.
20.
Giles
,
M.
,
1988
, “
Non-Reflecting Boundary Conditions for the Euler Equations
,” Computational Fluid Dynamics Laboratory, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, CFDL Report 88–1.
21.
Jeong
,
J.
, and
Hussain
,
F.
,
1995
, “
On the Identification of a Vortex
,”
J. Fluid Mech.
,
285
(
1
), pp.
69
94
.
22.
Wu
,
C.-H.
,
1952
, “
A General Theory of Three-Dimensional Flow in Subsonic and Supersonic Turbomachines of Axial-, Radial, and Mixed-Flow Types
,” DTIC Document,
Technical Report No. 2604
.
23.
Beheshti
,
B.
,
Farhanieh
,
B.
,
Ghorbanian
,
K.
,
Teixeira
,
J.
, and
Ivey
,
P.
,
2005
, “
Performance Enhancement in Transonic Axial Compressors Using Blade Tip Injection Coupled With Casing Treatment
,”
Proc. Inst. Mech. Eng. Part A
,
219
(
5
), pp.
321
331
.
24.
Weichert
,
S.
,
Day
,
I.
, and
Freeman
,
C.
,
2011
, “
Self-Regulating Casing Treatment for Axial Compressor Stability Enhancement
,”
ASME
Paper No. GT2011-46042.
You do not currently have access to this content.