In the most evolved designs, it is common practice to expose engine components to main annulus air temperatures exceeding the thermal material limit in order to increase the overall performance and to minimize the engine-specific fuel consumption (SFC). To prevent overheating of the materials and thus the reduction of the component life, an internal flow system is required to cool the critical engine parts and to protect them. This paper shows a practical application and extension of the methodology developed during the five-year research program, main annulus gas path interaction (MAGPI). Extensive use was made of finite element analysis (FEA (solids)) and computational fluid dynamics (CFD (fluid)) modeling techniques to understand the thermomechanical behavior of a dedicated turbine stator well cavity rig, due to the interaction of cooling air supply with the main annulus. Previous work based on the same rig showed difficulties in matching predictions to thermocouple measurements near the rim seal gap. In this investigation, two different types of turbine stator well geometries were analyzed, where—in contrast to previous analyses—further use was made of the experimentally measured radial component displacements during hot running in the rig. The structural deflections were applied to the existing models to evaluate the impact inflow interactions and heat transfer. Additionally, to the already evaluated test cases without net ingestion, cases simulating engine deterioration with net ingestion were validated against the available test data, also taking into account cold and hot running seal clearances. 3D CFD simulations were conducted using the commercial solver fluent coupled to the in-house FEA tool SC03 to validate against available test data of the dedicated rig.

References

References
1.
MAGPI
,
2006
, “
Main Annulus Gas Path Interaction—Specific Targeted Research Project
,” Proposal Contract No. 30874.
2.
AMEDEO
,
2013
, “
Aerospace Multidisciplinary Enabling Design Optimisation
,” Grant Reference No. 316394.
3.
Daily
,
J. W.
, and
Nece
,
R. E.
,
1960
, “
Chamber Dimension Effects on Induced Flow and Frictional Resistance of Enclosed Rotating Disks
,”
ASME J. Basic Eng.
,
82
(
1
), pp.
217
232
.
4.
Dixon
,
J. A.
,
Guijarro-Valencia
,
A.
,
Coren
,
D.
,
Eastwood
,
D.
, and
Long
,
C.
,
2014
, “
Main Annulus Gas Path Interactions—Turbine Stator Well Heat Transfer
,”
ASME J. Turbomach.
,
136
, p.
021010
.
5.
Smith
,
P. E. J.
,
Mugglestone
,
J.
,
Tham
,
K. M.
,
Coren
,
D. D.
, and
Long
,
C. A.
,
2012
, “
Conjugate Heat Transfer CFD Analysis in Turbine Disc Cavities
,”
ASME
Paper No. GT2012-69597.
6.
Andreini
,
A.
,
DaSoghe
,
R.
, and
Facchini
,
B.
,
2011
, “
Turbine Stator Well CFD Studies: Effects of Coolant Supply Geometry on Cavity Sealing Performance
,”
ASME J. Turbomach.
,
133
(
2
), p.
021008
.
7.
Lück
,
H.
,
Schäfer
,
M.
, and
Schiffer
,
H.-P.
,
2014
, “
Simulation of Thermal Fluid-Structure Interactions in Blade-Disc Configuration of an Aircraft Turbine Model
,”
ASME
Paper No. GT2014-26316.
8.
Amirante
,
D.
,
Hills
,
N. J.
, and
Barnes
,
C. J.
,
2012
, “
Use of Dynamic Meshes for Transient Metal Temperature Prediction
,”
ASME
Paper No. GT2012-68782.
9.
Dixon
,
J. A.
,
Guijarro-Valencia
,
A.
,
Bauknecht
,
A.
,
Coren
,
D.
, and
Atkins
,
N.
,
2013
, “
Heat Transfer in Turbine Hub Cavities Adjacent to the Main Gas Path
,”
ASME J. Turbomach.
,
135
(
2
), p.
021025
.
10.
Pohl
,
J.
,
Fico
,
V.
, and
Dixon
,
J. A.
,
2015
, “
Turbine Stator Well Cooling—Improved Geometry Benefits
,”
ASME
Paper No. GT2015-42658.
11.
Coren
,
D. D.
,
Atkins
,
N. R.
,
Childs
,
P. R. N.
,
Turner
,
J. R.
,
Eastwood
,
D.
,
Davies
,
S.
,
Dixon
,
J. A.
, and
Scanlon
,
T.
,
2010
, “
An Advanced-Multi Configuration Turbine Stator Well Cooling Test Facility
,”
ASME
Paper No. GT2010-23450.
12.
Eastwood
,
D.
,
Coren
,
D. D.
,
Long
,
C. A.
,
Atkins
,
N. R.
,
Childs
,
P. R. N.
,
Scanlon
,
T. J.
, and
Guijarro-Valencia
,
A.
,
2012
, “
Experi-Mental Investigation of Turbine Stator Well Rim Seal, Re-Ingestion and Interstage Seal Flows Using Gas Concentration Techniques and Displacement Measurements
,”
ASME J. Turbomach.
,
134
, p.
082501
.
13.
Eastwood
,
D.
,
2014
, “
Investigation of Rim Seal Exchange and Coolant Re-Ingestion in Rotor Stator Cavities Using Concentration Techniques
,”
Ph.D. thesis
, University of Sussex, Sussex, UK.
14.
Verdicchio
,
J. A.
,
2001
, “
The Validation and Coupling of Computational Fluid Dynamics and Finite Element Codes for Solving Industrial Problems
,”
Ph.D. thesis
, University of Sussex, Sussex, UK.
15.
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
.
16.
Illingworth
,
J.
,
Hills
,
N.
, and
Barnes
,
C. J.
,
2005
, “
3D Fluid-Solid Heat Transfer Coupling of an Aero-Engine Preswirl System
,”
ASME
Paper No. GT2005-68939.
17.
Shahpar
,
S.
, and
Lapworth
,
L.
,
2003
, “
PADRAM: Parametric Design and Rapid Meshing System for Turbomachinery Optimisation
,”
Power-Gen Int.
,
6
, pp.
579
590
.
18.
Wilcox
,
D. C.
,
1998
,
Turbulence Modeling for CFD
,
DCW Industries
,
La Cañada, CA
.
19.
Guijarro-Valencia
,
A.
,
Dixon
,
J. A.
,
Soghe
,
R. D.
,
Facchini
,
B.
,
Smith
,
P. E. J.
,
Muñoz
,
J.
,
Eastwood
,
D.
,
Long
,
C. A.
,
Coren
,
D.
, and
Atkins
,
N. R.
,
2012
, “
An Investigation Into Numerical Analysis Alternatives For Prediciting Re-Ingestion in Turbine Disc Rim Cavities
,”
ASME
Paper No. GT2012-68592.
20.
Kim
,
T. S.
, and
Cha
,
K. S.
,
2009
, “
Comparative Analysis of the Influence of Labyrinth Seal Configuration on Leakage Behaviour
,”
J. Mech. Sci. Technol.
,
23
(
10
), pp.
2830
2838
.
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