Focus of this paper is aerodynamic investigation of tie-boss stabilization devices for extremely long rotor blades. This investigation covered measurements on multiple blade cascades and computational fluid dynamics (CFD) simulation of the flow past these cascades. Conclusions were drawn from results of the measurements and CFD and from the knowledge of prior investigation of the used blade cascade. Main focus of this paper is to describe influence of a tie-boss stabilization device on flow field in interblade channel. Tie-boss with more massive shape proved to cause lesser losses, while tie-boss with a tailored trailing edge showed lesser influence on flow turning.

References

References
1.
Shigeki
,
S.
,
Kunio
,
A.
,
Atsuhiro
,
K.
, and
Goingwon
,
L.
,
2013
, “
Titanium 50-Inch and 60-Inch Last-Stage Blades for Steam Turbines
,”
Hitachi Rev.
,
62
, pp.
23
30
.http://www.hitachi.com/rev/pdf/2013/r2013_01_103.pdf
2.
Duan
,
C.
,
Ishibashi
,
K.
,
Senoo
,
S.
,
Bosdas
,
I.
,
Mansour
,
M.
, and
Kalfas
,
A. I.
,
2016
, “
Unsteady Wet Steam Flow Measurements in a Low-Pressure Test Steam Turbine
,”
Int. J. Fluid Mach. Syst.
,
9
(1), pp.
85
94
.
3.
Yashimata
,
Y.
,
Shiohata
,
K.
,
Kudo
,
T.
, and
Yoda
,
H.
,
2012
, “
Vibration Characteristics of a Continuous Cover Blade Structure With Friction Contact Surfaces of a Steam Turbine
,”
Tenth International Conference on Vibrations in Rotating Machinery
, London, Sept. 11–13, Paper No. C1324/048.
4.
Míšek
,
T.
, and
Kubín
,
Z.
,
2009
, “
Static and Dynamic Analysis of 1 220 mm Steel Last Stage Blade for Steam Turbine
,”
Appl. Comput. Mech.
,
3
, pp.
133
140
.https://dspace5.zcu.cz/bitstream/11025/1905/6/acm_vol3no1_p12.pdf
5.
Hoznedl
,
M.
,
Kolovratník
,
M.
,
Sedlák
,
K.
,
Bednář
,
L.
,
Kalista
,
R.
,
Bartoš
,
O.
, and
Mrózek
,
L.
,
2016
, “
Flow Conditions at the Last Stage and in the Exhaust Hood of the Turbine 1090 MW for Saturated Steam
,” Turbostroje (in Czech), Pilsen, Paper No. 2.
6.
Luxa
,
M.
,
Šimurda
,
D.
,
Šafařík
,
P.
,
Synáč
,
J.
, and
Rudas
,
B.
,
2013
, “
High-Speed Aerodynamic Investigation of the Midsection of 48″ Rotorblade for the Last Stage of Steam Turbine
,”
Tenth European Conference on Turbomachinery—Fluid Dynamics and Thermodynamics
(
ETC
), Lappeenranta, Finland, Apr. 15–19, pp. 360–369.http://www.euroturbo.eu/paper/ETC2013-116.pdf
7.
Luxa
,
M.
,
Synáč
,
J.
,
Šafařík
,
P.
, and
Šimurda
,
D.
,
2012
, “
Causes and Solution of Aperiodicity of Supersonic Flow Field Downstream of a Profile Cascade
,”
Komunikácie
,
14
(4a), pp. 23–28.
8.
JCGM
,
2008
,
Evaluation of Measurement Data—Guide to the Expression of Uncertainty in Measurement
, Joint Committee for Guides in Metrology.
9.
Menter
,
F. R.
,
1994
, “
Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications
,”
AIAA J.
,
32
(
8
), pp.
1598
1605
.
10.
Toro
,
E. F.
,
1997
,
Riemann Solvers and Numerical Methods for Fluid Dynamics
,
Springer
,
Berlin
, pp.
293
311
.
11.
Barth
,
T.
, and
Jespersen
,
D.
,
1989
, “
The Design and Application of Upwind Schemes on Unstructured Meshes
,”
AIAA
Paper No. 1989–366.
12.
Shen
,
C.
,
Xia
,
X. L.
,
Wang
,
Y. Z.
,
Yu
,
F.
, and
Jiao
,
W.
,
2016
, “
Implementation of Density-Based Implicit LU-SGS Solver in the Framework of OpenFOAM
,”
Adv. Eng. Software
,
91
, pp. 80–88.
13.
Fürst
,
J.
,
2017
, “
On the Implicit Density Based OpenFOAM Solver for Turbulent Compressible Flows
,”
EPJ Web of Conf.
,
143
, p.
02027
.
14.
Šimurda
,
D.
,
Fürst
,
J.
, and
Luxa
,
M.
,
2013
, “
3D Flow Past Transonic Turbine Cascade SE 1050—Experiment and Numerical Simulation
,”
J. Therm. Sci.
,
22
(4), pp.
311
319
.
15.
Launder
,
B. E.
, and
Spalding
,
D. B.
,
1974
, “
The Numerical Computation of Turbulent Flows
,”
Comput. Appl. Mech. Eng.
,
3
(
2
), pp.
269
289
.
16.
Roache
,
P.
,
1997
, “
Quantification of Uncertainty in Computational Fluid Dynamics
,”
Annu. Rev. Fluid Mech.
,
29
(1), pp.
123
160
.
17.
Amecke
,
J.
, and
Šafařík
,
P.
,
1995
, “
Data Reduction of Wake Flow Measurements With Injection of an Other Gas
,” DLR, Forschungsbericht, Göttingen, pp. 95–32.
You do not currently have access to this content.