The effect of rotor purge flow on the unsteady aerodynamics of a high-pressure turbine stage operating at design corrected conditions has been investigated, both experimentally and computationally. The experimental configuration consisted of a single-stage high-pressure turbine with a modern film-cooling configuration on the vane airfoil and the inner and outer end wall surfaces. Purge flow was introduced into the cavity located between the high-pressure vane and the high-pressure disk. The high-pressure blades and the downstream low-pressure turbine nozzle row were not cooled. All of the hardware featured an aerodynamic design typical of a commercial high-pressure ratio turbine and the flow path geometry was representative of the actual engine hardware. In addition to instrumentation in the main flow path, the stationary and rotating seals of the purge flow cavity were instrumented with high frequency response flush-mounted pressure transducers and miniature thermocouples in order to measure the flow field parameters above and below the angel wing.

Predictions of the time-dependent flow field in the turbine flow path were obtained using FINE/Turbo, a three-dimensional Reynolds-averaged Navier–Stokes computational fluid dynamics CFD code that had the capability to perform both a steady and unsteady analysis. The steady and unsteady flow fields throughout the turbine were predicted using a three blade-row computational model that incorporated the purge flow cavity between the high-pressure vane and disk. The predictions were performed in an effort to mimic the design process with no adjustment of boundary conditions to better match the experimental data. The time-accurate predictions were generated using the harmonic method. Part I of this paper concentrates on the comparison of the time-averaged and time-accurate predictions with measurements in and around the purge flow cavity. The degree of agreement between the measured and predicted parameters is described in detail, providing confidence in the predictions for the flow field analysis that will be provided in Part II.

References

References
1.
Bayley
,
F. J.
and
Owen
,
J. M.
,
1970
, “
The Fluid Dynamics of Shrouded Disk System With a Radial Outflow of Coolant
,”
ASME J. Eng. Power
,
92
(
3
), pp.
335
341
.10.1115/1.3445358
2.
Abe
,
T.
,
Kikuchi
,
J.
, and
Takeuchi
,
H.
,
1979
, “
An Investigation of Turbine Disk Cooling (Experimental Investigation and Observation of Hot Gas Flow Into a Wheel Space)
,”
13th CIMAC Congress
,
Vienna
, May 7–10, Paper No. GT-30.
3.
Phadke
,
U. P.
and
Owen
,
J. M.
,
1988
, “
Aerodynamic Aspects of the Sealing of Gas Turbine Rotor-Stator Systems—Part 1: The Behavior of Simple Shrouded Rotating Disk Systems in Quiescent Environment
,”
Int. J. Heat Fluid Flow
,
9
, pp.
98
105
.10.1016/0142-727X(88)90060-4
4.
Phadke
,
U. P.
and
Owen
,
J. M.
,
1988
, “
Aerodynamic Aspects of the Sealing of Gas Turbine Rotor-Stator Systems—Part 2: The Behavior of Simple Seals in a Quasi-Axisymmetric External Flow
,”
Int. J. Heat Fluid Flow
,
9
, pp.
106
112
.10.1016/0142-727X(88)90061-6
5.
Phadke
,
U. P.
and
Owen
,
J. M.
,
1988
, “
Aerodynamic Aspects of the Sealing of Gas Turbine Rotor-Stator Systems—Part 3: The Effect of Non-Axisymmetric External Flow on Seal Performance
,”
Int. J. Heat Fluid Flow
,
9
, pp.
113
117
.10.1016/0142-727X(88)90062-8
6.
Ko
,
S. H.
and
Rhode
,
D. L.
,
1992
, “
Thermal Details in a Rotor-Stator Cavity at Engine Conditions With a Mainstream
,”
ASME J. Turbomach.
,
114
(
2
), pp.
446
453
.10.1115/1.2929164
7.
Johnson
,
B. V.
,
Mack
,
G. J.
,
Paolillo
,
R. E.
, and
Daniels
,
W. A.
,
1994
, “
Turbine Rim Seal Gas Path Flow Ingestion Mechanisms
,”
AIAA
Paper No. 94-2703.10.2514/6.1994-2703
8.
Johnson
,
B. V.
,
Bohn
,
D.
,
Jakoby
,
R.
, and
Cunat
,
D.
,
2006
, “
A Method for Estimating the Influence of Time-Dependent Vane and Blade Pressure Fields on Turbine Rim Seal Ingestion
,”
ASME Turbo Expo
,
Barcelona, Spain
, May 8–11,
ASME
Paper No. GT2006-90853.10.1115/GT2006-90853
9.
Green
,
T.
and
Turner
,
A. B.
,
1994
, “
Ingestion Into the Upstream Wheelspace of an Axial Turbine Stage
,”
ASME J. Turbomach.
,
116
(
2
), pp.
327
332
.10.1115/1.2928368
10.
Hills
,
N. J.
,
Chew
,
J. W.
,
Green
,
T.
, and
Turner
,
A. B.
,
1997
, “
Aerodynamics of Turbine Rim-Seal Ingestion
,”
ASME Turbo Expo
,
Orlando, FL
, June 2–5, ASME Paper No. 97-GT-268.
11.
Hills
,
N. J.
,
Chew
,
J. W.
, and
Turner
,
A. B.
,
2002
, “
Computational and Mathematical Modeling of Turbine Rim Seal Ingestion
,”
ASME J. Turbomach.
,
124
(
2
), pp
306
315
.10.1115/1.1456461
12.
Bohn
,
D.
,
Rudzinski
,
B.
,
Suerken
,
N.
, and
Gaertner
,
W.
,
2000
, “
Experimental and Numerical Investigation of the Influence of Rotor Blades on Hot Gas Ingestion Into the Upstream Cavity of an Axial Turbine Stage
,”
ASME Turbo Expo
,
Munich, Germany
, May 8–11, ASME Paper No. 2000-GT-284.
13.
Roy
,
R. P.
,
Zhou
,
D. W.
,
Ganesan
,
S.
,
Wnag
,
C.-Z.
,
Paolillo
,
R. E.
, and
Johnson
,
B. V.
,
2007
, “
The Flow Field and Main Ingestion in a Rotor-Stator Cavity
,”
ASME Turbo Expo
,
Montreal, QC, Canada
, May 14–17,
ASME
Paper No. GT2007-27671.10.1115/GT2007-27671
14.
Mirzamoghadam
,
A. V.
,
Heitland
,
G.
,
Morris
,
M. C.
,
Smokte
,
J.
,
Malak
,
M.
, and
Howe
,
J.
,
2008
, “
3D CFD Ingestion Evaluation of a High Pressure Turbine Rim Seal Disk Cavity
,”
ASME Turbo Expo
,
Berlin, Germany
, June 9–13,
ASME
Paper No. GT2008-50531.10.1115/GT2008-50531
15.
Mirzamoghadam
,
A. V.
,
Heitland
,
G.
, and
Hosseini
,
K. M.
,
2009
, “
The Effect of Annulus Performance Parameters on Rotor-Stator Cavity Sealing Flow
,”
ASME Turbo Expo
,
Orlando, FL
, June 8–12,
ASME
Paper No. GT2009-59380.10.1115/GT2009-59380
16.
Schuepbach
,
P.
,
Abhari
,
R. S.
,
Rose
,
M. G.
,
Germain
,
T.
,
Raab
,
I.
, and
Gier
,
J.
,
2010
, “
Effects of Suction and Injection Purge-Flow on the Secondary Structures of a High-Work Turbine
,”
ASME J. Turbomach.
,
132
(
2
), p.
021021
.10.1115/1.4000485
17.
Schuepbach
,
P.
,
Abhari
,
R. S.
,
Rose
,
M. G.
,
Germain
,
T.
,
Raab
,
I.
, and
Gier
,
J.
,
2011
, “
Influence of Rim Seal Purge Flow on the Performance of an End-Wall-Profiled Axial Turbine
,”
ASME J. Turbomach.
,
133
(
2
), p.
021011
.10.1115/1.4000578
18.
Green
,
B. R.
,
2011
, “
Time-Averaged and Time-Accurate Aerodynamic Effects of Rotor Purge Flow for a Modern, Rotating, High-Pressure Turbine Stage and Low-Pressure Turbine Vane
,” Ph.D. dissertation,
Department of Mechanical and Aerospace Engineering
,
The Ohio State University, Columbus, OH
.
19.
Dunn
,
M. G.
,
Moller
,
J. C.
, and
Steel
,
R. C.
,
1989
, “
Operating Point Verification for a Large Shock Tunnel Test Facility
,” Paper No. WRDC-TR-2027.
20.
Haldeman
,
C. W.
,
Mathison
,
R. M.
,
Dunn
,
M. G.
,
Southworth
,
S.
,
Harral
,
J. W.
, and
Heitland
,
G.
,
2008
, “
Aerodynamic and Heat Flux Measurements in a Single Stage Fully Cooled Turbine—Part I: Experimental Approach
,”
ASME J. Turbomach.
,
130
(
2
), p.
021015
.10.1115/1.2750676
21.
Mathison
,
R. M.
,
Haldeman
,
C. W.
, and
Dunn
,
M. G.
,
2010
, “
Aerodynamics and Heat Transfer for a Cooled One and One-Half Stage High-Pressure Turbine—Part I: Vane Inlet Temperature Profile Generation and Migration
,”
ASME J. Turbomach.
,
134
(
1
), p.
011006
.10.1115/1.4002994
22.
FINE/Turbo User's Manual
,
2007
, “
User Manual: FINE/Turbo v8 (Including Euranus) Flow Integrated Environment
,”
NUMECA International, Brussels, Belgium
.
23.
Chen
,
T.
,
Vasanthakumar
,
P.
, and
He
,
L.
,
2001
, “
Analysis of Unsteady Blade-Row Interaction Using Nonlinear Harmonic Approach
,”
J. Propul. Power
,
17
(
3
), pp.
306
315
.10.2514/2.5792
24.
Green
,
B. R.
,
Mathison
,
R. M.
, and
Dunn
,
M. G.
2012
, “
Comparison of Harmonic and Time-Marching Unsteady CFD Solutions With Experimental Results for a Single Stage High-Pressure Turbine
,”
ASME Turbo Expo
,
Copenhagen, Denmark
, June 11–15, ASME Paper No. GT2012-69934.
25.
Spalart
,
P. R.
and
Allmaras
,
S. R.
,
1992
, “
A One-Equation Turbulence Model for Aerodynamic Flows
,”
AIAA
Paper No. 92-0439.10.2514/6.1992-439
26.
Mathison
,
R. M.
,
Haldeman
,
C. W.
, and
Dunn
,
M. G.
,
2010
, “
Aerodynamics and Heat Transfer for a Cooled One and One-Half Stage High-Pressure Turbine—Part II: Influence of Inlet Temperature Profile on Blade Heat Flux
,”
ASME J. Turbomach.
,
134
(
1
), p.
011007
.10.1115/1.4002995
27.
Mathison
,
R. M.
,
Wishart
,
M. B.
,
Haldeman
,
C. W.
, and
Dunn
,
M. G.
,
2010
, “
Temperature Predictions and Comparison With Measurements for the Blade Leading Edge and Platform of a 1-1/2 Stage Transonic HP Turbine
,”
ASME J. Turbomach.
,
134
(
1
), p.
011016
.10.1115/1.4002992
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