Reliable means of predicting heat transfer in cavities adjacent to the main gas path are increasingly being sought by engineers involved in the design of gas turbines. In this paper, an interim summary of the results of a five-year research program sponsored by the European Union (EU) and several leading gas turbine manufacturers and universities will be presented. Extensive use is made of computational fluid dynamics (CFD) and finite element (FE) modeling techniques to understand the thermo-mechanical behavior of a turbine stator well cavity, including the interaction of cooling air supply with the main annulus gas. The objective of the study has been to provide a means of optimizing the design of such cavities for maintaining a safe environment for critical parts, such as disc rims and blade fixings, while maximizing the turbine efficiency and minimizing the fuel burn and emissions penalties associated with the secondary airflow system. The modeling methods employed have been validated against data gathered from a dedicated two-stage turbine rig running at engine representative conditions. Extensive measurements are available for a range of flow conditions and alternative cooling arrangements. The analysis method has been used to inform a design change, which is also to be tested. Comparisons are provided between the predictions and measurements of the turbine stator well component temperature.

References

References
1.
2006, Main Annulus Gas Path Interactions (MAGPI), Contract No. 30874
.
2.
Dixon
,
J. A.
,
Brunton
,
I. L.
,
Scanlon
,
T. J.
,
Wojciechowski
,
G.
,
Stefanis
,
V.
, and
Childs
P. R. N.
,
2006
, “
Turbine Stator Well Heat Transfer and Cooling Flow Optimisation
,”
ASME Turbo Expo 2006: Power for Land, Sea, and Air (GT2006)
,
Barcelona, Spain
,
May
8–11
,
ASME
,
New York
,
pp.
1375
1383
,
Vol.
3
.
3.
Illingworth
,
J.
,
Hills
,
N.
, and
Barnes
C. J.
,
2005
, “
3D Fluid-Solid Heat Transfer Coupling of an Aero Engine Pre-swirl System
”,
ASME Turbo Expo 2005: Power for Land, Sea, and Air (GT2005)
, Vol.
3
,
Reno, Nevada
,
June
6–9
,
ASME
,
New York
,
pp.
801
811
.
4.
Coren
,
D. D.
,
Atkins
,
N. R.
,
Childs
,
P. R. N.
,
Turner
,
J. R.
,
Eastwood
,
D.
,
Davies
,
S.
,
Dixon
,
J.
, and
Scanlon
,
T.
,
2010
, “
An Advanced Multi-Configuration Turbine Stator Well Cooling Test Facility
,”
ASME Turbo Expo 2010: Power for Land, Sea, and Air (GT2010)
,
Vol.
4
,
Glasgow, UK
,
June
14–18
,
ASME
,
New York
,
pp.
1259
1270
.
5.
Sun
,
Z.
,
Chew
,
J.
,
Hills
,
N.
,
Volkov
,
K.
, and
Barnes
C. J.
,
2008
, “
Efficient FEA/CFD Thermal Coupling for Engineering Applications
,”
ASME Turbo Expo 2008: Power for Land, Sea, and Air (GT2008)
,
Vol
.
4
,
Berlin, Germany
,
June
9–13
,
ASME
,
New York
,
pp.
1505
1515
.
6.
Amirante
,
D.
, and
Hills
,
N.
,
2009
, “
A Coupled Approach for Aerothermal Mechanical Modelling for Turbomachinery
,”
1st International Conference on Computational Methods for Thermal Problems
,
Naples, Italy
,
Sept.
8–10
.
7.
Edmunds
,
T.
,
1993
, “
Practical Three Dimensional Adaptive Analysis
,”
Proceedings of 4th International Conference on Quality Assurance and Standards: Brighton, 1993
,
NAFEMS
,
Lanarkshire, UK
.
8.
FLUENT
,
Fluent, Inc.
Lebanon, NH
.
9.
Verdicchio
,
J. A.
,
2001
, “
The Validation and Coupling of Computational Fluid Dynamics and Finite Element Codes for Solving Industrial Problems
,”
D.Phil Thesis
,
University of Sussex
.
10.
Shahpar
,
S.
, and
Lapworth
,
L.
,
2003
, “
PADRAM: Parametric Design and Rapid Meshing System for Turbomachinery Optimisation
,”
ASME Turbo Expo 2003 and 2003 International Joint Power Generation Conference (GT2003)
,
Vol.
6
,
Atlanta, GA
,
June
16–19
,
ASME
,
New York
,
pp.
579
590
.
11.
Lapworth
,
L.
,
2009
,
Hydra's User Guide for Version 6.1.7 Beta
,
Rolls-Royce plc
,
London
.
12.
Andreini
,
A.
,
Da Soghe
,
R.
, and
Facchini
,
B.
,
2009
, “
Turbine Stator Well CFD Studies: Effects of Coolant Supply Geometry on Cavity Sealing Performance
,”
J. Turbomach.
,
133
, p.
021008
.10.1115/1.4000570
13.
Launder
,
B. E.
, and
Spalding
,
D. B.
,
1974
, “
The Numerical Computation of Turbulent Flows
,”
Comput. Methods Appl. Mech. Eng.
,
3
,
pp.
269
289
.10.1016/0045-7825(74)90029-2
14.
Spalart
,
P. R.
, and
Allmaras
,
S. R.
,
1991
, “
A One-Equation Turbulence Model for Aerodynamic Flows
,”
AIAA Paper No. 92-0439
.
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