A high-pressure vane (HPV) equipped with a realistic film-cooling configuration has been studied. The vane is characterized by the presence of multiple rows of fan-shaped holes along pressure and suction side, while the leading edge (LE) is protected by a showerhead system of cylindrical holes. Steady three-dimensional Reynolds-averaged Navier–Stokes simulations have been performed. A preliminary grid sensitivity analysis with uniform inlet flow has been used to quantify the effect of spatial discretization. Turbulence model has been assessed in comparison with available experimental data. The effects of the relative alignment between combustion chamber and HPVs are then investigated, considering realistic inflow conditions in terms of hot spot and swirl. The inlet profiles used are derived from the EU-funded project TATEF2. Two different clocking positions are considered: the first in which hot spot and swirl core are aligned with passage; and the second in which they are aligned with the LE. Comparisons between metal temperature distributions obtained from conjugate heat transfer (CHT) simulations are performed, evidencing the role of swirl in determining both the hot streak trajectory within the passage and the coolant redistribution. The LE aligned configuration is determined to be the most problematic in terms of thermal load, leading to increased average and local vane temperature peaks on both suction side and pressure side with respect to the passage-aligned case. A strong sensitivity to both injected coolant mass flow and heat removed by heat sink effect has also been highlighted for the showerhead cooling system.

References

References
1.
Gourdain
,
N.
,
Gicquel
,
L. Y. M.
, and
Collado Morata
,
E.
,
2011
, “
Comparison of RANS Simulation and LES for the Prediction of Heat Transfer in a Highly Loaded Turbine Guide Vane
,”
9th European Conference on Turbomachinery—Fluid Dynamics and Thermodynamics
,
Istanbul
,
Turkey
, Mar. 21–25, 2010,
M.
Sen
,
G.
Bois
,
T.
Arts
, and
M.
Manna
, eds.,
Istanbul Technical University
, Istanbul, Turkey, Vol.
2
, pp.
847
862
.
2.
Duchaine
,
F.
,
Corpron
,
A.
,
Pons
,
L.
,
Moureau
,
V.
,
Nicoud
,
F.
, and
Poinsot
,
T.
,
2009
, “
Development and Assessment of a Coupled Strategy for Conjugate Heat Transfer With Large Eddy Simulation: Application to a Cooled Turbine Blade
,”
Int. J. Heat Fluid Flow
,
30
(
6
), pp.
1129
1141
.
3.
Takahashi
,
T.
,
Funazaki
,
K.
,
Salleh
,
H. B.
,
Sakai
,
E.
, and
Watanabe
,
K.
,
2012
, “
Assessment of URANS and DES for Prediction of Leading Edge Film Cooling
,”
ASME J. Turbomach.
,
134
(
3
), p.
031008
.
4.
Adami
,
P.
,
Martelli
,
F.
,
Chana
,
K. S.
, and
Montomoli
,
F.
,
2003
, “
Numerical Predictions of Film Cooled NGV Blades
,”
ASME
Paper No. GT2003-38861.
5.
Wilcox
,
D. C.
,
1993
,
Turbulence Modeling for CFD
,
DCW Industries
, La Cañada, CA.
6.
Luo
,
J.
, and
Razinsky
,
E. H.
,
2007
, “
Conjugate Heat Transfer Analysis of a Cooled Turbine Vane Using the V2F Turbulence Model
,”
ASME J. Turbomach.
,
129
(
4
), pp.
773
781
.
7.
Lien
,
F. S.
, and
Kalitzin
,
G.
,
2001
, “
Computations of Transonic Flow With the υ2-f Turbulence Model
,”
Int. J. Heat Fluid Flow
,
22
(
1
), pp.
53
61
.
8.
Insinna
,
M.
,
Griffini
,
D.
,
Salvadori
,
S.
, and
Martelli
,
F.
,
2014
, “
Film Cooling Performance in a Transonic High-Pressure Vane: Decoupled Simulation and Conjugate Heat Transfer Analysis
,”
Energy Procedia
,
45
(
1
), pp.
1126
1135
.
9.
Walters
,
D. K.
, and
Cokljat
,
D.
,
2008
, “
A Three-Equation Eddy-Viscosity Model for Reynolds-Averaged Navier–Stokes Simulations of Transitional Flow
,”
ASME J. Fluid. Eng.
,
130
(
12
), p.
1214011
.
10.
He
,
L.
,
Menshikova
,
V.
, and
Haller
,
B. R.
,
2004
, “
Influence of Hot Streak Circumferential Length-Scale in Transonic Turbine Stage
,”
ASME
Paper No. GT2004-53370.
11.
Giller
,
L.
, and
Schiffer
,
H.
,
2012
, “
Interactions Between the Combustor Swirl and the High Pressure Stator of a Turbine
,”
ASME
Paper No. GT2012-69157.
12.
Insinna
,
M.
,
Griffini
,
D.
,
Salvadori
,
S.
, and
Martelli
,
F.
,
2014
, “
Conjugate Heat Transfer Analysis of a Film Cooled High-Pressure Turbine Vane Under Realistic Combustor Exit Flow Conditions
,”
ASME
Paper No. GT2014-25280.
13.
Jonsson
,
M.
, and
Ott
,
P.
,
2007
, “
Heat Transfer Experiments on a Heavily Film Cooled Nozzle Guide Vane
,”
7th European Conference on Turbomachinery (ECT)—Fluid Dynamics and Thermodynamics
, Athens, Mar. 5–9, pp.
1011
1020
.
14.
Insinna
,
M.
,
Griffini
,
D.
,
Salvadori
,
S.
, and
Martelli
,
F.
,
2015
, “
Effects of Realistic Inflow Conditions on the Aero-Thermal Performance of a Film-Cooled Vane
,”
11th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics
(
ETC
), Madrd, Mar. 23–27, Paper No. ETC2015-095.
15.
Murthy
,
J. Y.
, and
Mathur
,
S. R.
,
2012
, “
Computational Heat Transfer in Complex Systems: A Review of Needs and Opportunities
,”
ASME J. Heat Transfer
,
134
(
3
), p.
031016
.
16.
Charbonnier
,
D.
,
Ott
,
P.
,
Jonnson
,
M.
,
Köbke
,
T.
, and
Cottier
,
F.
,
2008
, “
Comparison of Numerical Investigations With Measured Heat Transfer Performance of a Film Cooled Turbine Vane
,”
ASME
Paper No. GT2008-50623.
17.
Salvadori
,
S.
,
Montomoli
,
F.
,
Martelli
,
F.
,
Chana
,
K. S.
,
Qureshi
,
I.
, and
Povey
,
T.
,
2012
, “
Analysis on the Effect of a Nonuniform Inlet Profile on Heat Transfer and Fluid Flow in Turbine Stages
,”
ASME J. Turbomach.
,
134
(
1
), p.
011012
.
18.
Qureshi
,
I.
,
Beretta
,
A.
,
Chana
,
K.
, and
Povey
,
T.
,
2012
, “
Effect of Aggressive Inlet Swirl on Heat Transfer and Aerodynamics in an Unshrouded Transonic HP Turbine
,”
ASME J. Turbomach.
,
134
(
6
), p.
061023
.
19.
Roache
,
P. J.
,
Kirti
,
N. G.
, and
White
,
F. M.
,
1986
, “
Editorial Policy Statement on the Control of Numerical Accuracy
,”
ASME J. Fluid. Eng.
,
108
(
1
), p.
2
.
You do not currently have access to this content.