In this paper, the influence of nonuniform bleed extraction on the stability of an axial flow compressor is quantified. Nonuniformity can be caused by several geometric factors (for example, plenum chamber size or number of off-take ducts), and a range of configurations is examined experimentally in a single stage compressor. It is shown that nonuniform bleed leads to a circumferential distribution of flow coefficient and swirl angle at inlet to the downstream stage. The resultant distribution of rotor incidence causes stall to occur at a higher flow coefficient than if the same total bleed rate had been extracted uniformly around the circumference. A connection is made between the analysis of nonuniform bleed extraction and the familiar DCθ criterion used to characterize inlet total pressure distortion. The loss of operating range caused by the nonuniform inlet flow correlates with the peak sector-averaged bleed nonuniformity for all the bleed configurations tested.

References

1.
Leishman
,
B. A.
,
Cumpsty
,
N. A.
, and
Denton
,
J. D.
,
2007
, “
Effects of Bleed Rate and Endwall Location on the Aerodynamic Behavior of a Circular Hole Bleed Off-Take
,”
ASME J. Turbomach.
,
129
(
4
), pp.
645
658
.10.1115/1.2752191
2.
Leishman
,
B. A.
,
Cumpsty
,
N. A.
, and
Denton
,
J. D.
,
2007
, “
Effects of Inlet Ramp Surfaces on the Aerodynamic Behavior of Bleed Hole and Bleed Slot Off-Take Configurations
,”
ASME J. Turbomach.
,
129
(
4
), pp.
659
668
.10.1115/1.2752192
3.
Conan
,
F.
, and
Savarese
,
S.
,
2001
, “
Bleed Airflow CFD Modelling in Aerodynamics Simulations of Jet Engine Compressors
,”
ASME
Paper No. 2001-GT-0544.10.1115/2001-GT-0544
4.
Wellborn
,
S. R.
, and
Koiro
,
M.
,
2002
, “
Bleed Flow Interactions With an Axial Flow Compressor Powerstream
,”
AIAA
Paper No. 2002-4057.10.2514/6.2002-4057
5.
Leishman
,
B. A.
, and
Cumpsty
,
N. A.
,
2007
, “
Mechanism of the Interaction of a Ramped Bleed Slot With the Primary Flow
,”
ASME J. Turbomach.
,
129
(
4
), pp.
669
678
.10.1115/1.2752193
6.
Gomes
,
R.
,
Schwarz
,
C.
, and
Peitzner
,
M.
,
2005
, “
Aerodynamic Investigations of a Compressor Bleed Air Configuration Typical for Aeroengines
,”
17th International Symposium on Air Breathing Engines
, Munich, Sept. 4–9, Paper No. ISABE-2005-1264.
7.
Gomes
,
R.
, and
Schwarz
,
C.
,
2006
, “
Experimental Investigation of a Generic Compressor Bleed System
,”
ASME
Paper No. GT2006-90458.10.1115/GT2006-90458
8.
Di Mare
,
L.
,
Simpson
,
G.
,
Mueck
,
B.
, and
Sayma
,
A.
,
2006
, “
Effect of Bleed Flows on Flutter and Forced Response of Core Compressors
,”
ASME
Paper No. GT2006-90683.10.1115/GT2006-90458
9.
Reid
,
C.
,
1969
, “
The Response of Axial Flow Compressors to Intake Flow Distortion
,”
ASME
Paper No. 69-GT-29.
10.
Rannie
,
W. D.
, and
Marble
,
F. E.
,
1957
, “
Unsteady Flows in Axial Turbomachines
,” Communication aux Journées Internationales de Sciences Aéronautiques, Paris, May 27–29, pp.
1
21
.
11.
Greitzer
,
E. M.
,
Mazzawy
,
R. S.
, and
Fulkerson
,
D. A.
,
1978
, “
Flow Field Coupling Between Compression System Components in Asymmetric Flow
,”
ASME J. Eng. Power
,
100
(
1
), pp.
66
72
.10.1115/1.3446328
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