Abstract

Immersed bodies such as struts, vanes, and instrumentation probes in gas turbine flow systems will, except at the lowest of flow velocities, shed separated wakes. These wakes can have both upstream and downstream effects on the surrounding flow. In most applications, surrounding components are designed to be in the presence of a quasi-steady or at least nonvariant flow field. The presence of unsteady wakes has both aerodynamic and structural consequences. Active flow control of wake generation can therefore be very valuable. One means to implement active flow control is by the use of plasma actuation. Plasma actuation is the use of strong electric fields to generate ionized gas that can be actuated and controlled using the electric fields. The controlling device can be based on AC, DC, or pulsed-DC actuation. The present research was conducted using pulsed-DC from a capacitive discharge power supply. The study demonstrates the applicability of, specifically, pulsed-DC plasma flow control of the flow on a circular cylinder at high Reynolds numbers. The circular cylinder was selected because its flow characteristics are related to gas turbine flowpath phenomena, and are well characterized. Further, the associated pressure gradients are some of the most severe encountered in fluid applications. The development of effective plasma actuators at high Reynolds numbers under the influence of severe pressure gradients is a necessary step toward developing useful actuators for gas turbine applications beyond laboratory use. The reported experiments were run at Reynolds numbers varying from 50,000 to 97,000, and utilizing various pulse frequencies. Further the observed performance differences with varying electric field strengths are discussed for these Reynolds numbers. The results show that flow behaviors at high Reynolds numbers can be influenced by these types of actuators. The actuators were able to demonstrate a reduction in both wake width and momentum deficit.

References

1.
Lord
,
W. K.
,
MacMartin
,
D. G.
, and
Tillman
,
T. G.
,
2000
, “
Flow Control Opportunities in Gas Turbine Engines
,”
AIAA
Paper No. 2000-2234.10.2514/6.2000-2234
2.
Rethmel
,
C.
,
Little
,
J.
,
Takashima
,
K.
,
Sinha
,
A.
,
Adamovich
,
I.
, and
Samimy
,
M.
,
2011
, “
Flow Separation Control Over an Airfoil With Nanosecond Pulse Driven DBD Plasma Actuators
,”
AIAA
Paper No. 2011-48710.2514/6.2011-487
.
3.
Im
,
S.
,
Do
,
H.
, and
Cappelli
,
M. A.
,
2011
, “
Plasma Control of a Turbulent Boundary Layer in an Unstarting Supersonic Flow
,”
AIAA
Paper No. 2011-1143.10.2514/6.2011-1143
4.
Yamada
,
S.
,
Shibata
,
K.
,
Ishikawa
,
H.
,
Honami
,
S.
, and
Motoske
,
M.
,
2010
, “
Flow Behavior Behind a Circular Cylinder by DBD Plasma Actuators in Low Reynolds Number
,”
AIAA
Paper No. 2010-549.10.2514/6.2010-549
5.
Schlichting
,
H.
, and
Gersten
,
K.
,
2003
,
Boundary Layer Theory
, 8th ed.,
Springer-Verlag
,
Berlin
.
6.
Thompson
,
A. C.
,
2009
, “
Investigation and Simulation of Ion Flow Control Over a Flat Plate and Compressor Cascade
,” Master's thesis, Virginia Tech, Blacksburg, VA.
7.
Richard
,
M.
,
Dunn-Rankin
,
D.
,
Weinberg
,
F.
, and
Carleton
,
F.
,
2006
, “
Maximizing Ion-Driven Gas Flows
,”
J. Electrostat.
,
64
(6)
, pp.
368
376
.10.1016/j.elstat.2005.09.005
8.
Léger
,
L.
,
Moreau
,
E.
, and
Touchard
,
G. G.
,
2002
, “
Effect of a DC Corona Electrical Discharge on the Airflow Along a Flate Plate
,”
IEEE Trans. Ind. Appl.
,
38
(
6
), pp.
1478
1485
.10.1109/TIA.2002.804769
9.
Léger
,
L.
,
Moreau
,
E.
, and
Touchard
,
G. G.
,
2002
, “
Electrohydrodynamic Airflow Control Along a Flat Plate by a DC Surface Corona Discharge—Velocity Profile and Wall Pressure Measurements
,”
AIAA
Paper No. 2002-2833.10.2514/6.2002-2833
10.
Matsuno
,
T.
,
Ota
,
K.
,
Kanatani
,
T.
, and
Kawazoe
,
H.
,
2010
, “
Parameter Design Optimization of Plasma Actuator Configuration for Separation Control
,”
AIAA
Paper No. 2010-4983.10.2514/6.2010-4983
11.
Corke
,
T. C.
, and
Post
,
M. L.
,
2005
, “
Overview of Plasma Flow Control: Concepts, Optimization, and Applications
,”
AIAA
Paper No. 2005-563.10.2514/6.2005-563
12.
Takashima
,
K.
,
Zuzeek
,
Y.
,
Lempert
,
W. R.
, and
Adamovich
,
I. V.
,
2010
, “
Characterization of a Surface Dielectric Barrier Discharge Plasma Sustained by Repetitive Nanosecond Pulses
,”
AIAA
Paper No. 2010-4764.10.2514/6.2010-4764
13.
Jukes
,
T. N.
, and
Choi
,
K.
,
2009
, “
Flow Control Around a Circular Cylinder Using Pulsed Dielectric Barrier Discharge Surface Plasma
,”
Phys. Fluids
,
21
(8), p.
084103
.10.1063/1.3194307
14.
Nishihara
,
M.
,
Takashima
,
K.
,
Rich
,
J. W.
, and
Adamovich
,
I. V.
,
2011
, “
Mach 5 Bow Shock Control by a Nanosecond Pulse Surface DBD
,”
AIAA
Paper No. 2011-1144.10.2514/6.2011-1144
15.
Golub
,
V. V.
,
Son
,
E. E.
,
Saveliev
,
A. S.
,
Sechenov
,
V. A.
, and
Tereshonok
,
D. V.
,
2011
, “
Investigation of Vortex Structure Near the Surface of DBD-Actuator
,”
AIAA
Paper No. 2011-154.10.2514/6.2011-154
16.
Tkacik
,
P. T.
,
1980
, “
Cascade Perfomance of Double Circular Arc Compressor Blades at High Angles of Attack
,” Master's thesis, Virginia Tech, Blacksburg, VA.
17.
Gregory
,
J. W.
,
Porter
,
C. O.
, and
McLaughlin
,
T. E.
,
2008
, “
Circular Cylinder Wake Control Using Spatially Distributed Plasma Forcing
,”
AIAA
Paper No. 2008-4198.10.2514/6.2008-4198
18.
Mertz
,
B. E.
, and
Corke
,
T. C.
,
2011
, “
Single-Dielectric Barrier Discharge Plasma Actuator Modelling and Validation
,”
J. Fluid Mech.
,
669
(2), pp.
557
583
.10.1017/S0022112010005203
19.
Durscher
,
R.
, and
Roy
,
S.
,
2011
, “
Induced Flow From Serpentine Plasma Actuators Acting in Quiescent Air
,”
AIAA
Paper No. 2011-957.10.2514/6.2011-957
20.
Wang
,
C. C.
, and
Roy
,
S.
,
2011
, “
Geometry Effects of Dielectric Barrier Discharge on a Flat Surface
,”
AIAA
Paper No. 2011-732.10.2514/6.2011-732
21.
Moreau
,
E.
,
Sosa
,
R.
, and
Artana
,
G.
,
2008
, “
Electric Wind Produced by Surface Plasma Actuators: A New Dielectric Barrier Discharge Based on a Three-Electrode Geometry
,”
J. Phys. D: Appl. Phys.
,
41
(11), p.
115204
.10.1088/0022-3727/41/11/115204
You do not currently have access to this content.