Blade flutter problems will become more serious in the near future for large power generating turbines as unavoidable consequences of the increasing share of power generated by renewable energy sources. The Institute of Thermomechanics of the Czech Academy of Sciences (IT CAS) was awarded a grant to initiate a blade flutter research program. The main thrust of the IT CAS role in this program is to pursue advancements in experimental technique applications and to establish a reliable experimental database of blade mutual aerodynamic interactions during the blade flutter onset for the sonic and transonic flow regimes in particular. A new sophisticated test section for transonic blade flutter research was designed and being manufactured to fulfill such requirements. Experience gained while working with the NASA Transonic Flutter Cascade facility resulted in new innovative features included in the new design. The new facility will be delivered to the High-Speed Laboratory in Novy Knin by the end of September 2020.

1.
B.
Megerle
,
“Unsteady Aerodynamics of Low-Pressure Steam Turbines Operating under Low Volume Flow Conditions
”, Ph.D. thesis no. 6096,
École Polytechnique Fédérale de Lausanne
,
2014
.
2.
D. M.
Vogt
and
T. H.
Fransson
,
“A New Turbine Cascade for Aeromechanical Testing
”,
16th Symposium on Measuring Techniques in Transonic and Supersonic Flows in Cascades and Turbomachines
,
Cambridge, UK
,
2002
.
3.
T. H.
Franson
and
D. M.
Vogt
, “
A New Facility for Investigating Flutter in Axial Turbomachines
”,
Paper at the 8th National Turbine Engine High Cycle Fatigue Conference
,
Monterey, California, U.S.A
.,
2003
.
4.
A.
Bölcs
, A.,
“A Test Facility for the Investigation od Steady and Unsteady Transonic Flows in Annual Cascades
”,
ASME paper 83-GT-34
,
1983
.
5.
H.
Körbächer
and
A.
Bölcs
,
“Experimental Investigation of the Unsteady Behavior of a Compressor Cascade in an Annular Ring Channel
”,
Paper 7ᵗʰ ISUAAT conference
,
Fukuoka, Japan
,
1996
.
6.
L. M.
Shaw
,
D. R.
Boldman
,
A. E.
Buggele
and
D. H.
Buffum
,
“Unsteady Pressure Measurements on a Biconvex Airfoil in a Transonic Oscillating Cascade
”,
NASA TM-86914
,
1986
.
7.
D. H.
Buffum
and
S.
Fleeter
,
“Aerodynamics of a Linear Oscillating Cascade
”,
NASA TM-103250
,
1990
.
8.
J.
Lepicovsky
,
E. R.
McFarland
,
V. R.
,
Capece
,
T. A.
Jett
, and
R. G.
Senyitko
,
“Methodology of Blade Unsteady Pressure Measurement in the NASA Transonic Flutter Cascade
”,
NASA TM-211894
,
2002
.
9.
J.
Lepicovsky
,
M.
Luxa
and
D.
Simurda
,
“Effects of Flow Distortion on Clarity of Interferometer Data
”,
ASME paper GT2020-14378
,
Proc. of ASME Turbo Expo 2020
,
London, UK
,
2020
.
10.
J.
Lepicovsky
,
“Effects of Transducer Installation on Unsteady Pressure Measurements on Oscillating Blades
”,
ASME paper GT-2005-69000
,
Proc. of ASME Turbo Expo 2005, Reno, NV, U.S.A.; also NASA CR-213797
,
2005
.
This content is only available via PDF.
You do not currently have access to this content.