scholarly journals The impulse response of a high-speed jet forced with localized arc filament plasma actuators

2012 ◽  
Vol 24 (12) ◽  
pp. 125104 ◽  
Author(s):  
Aniruddha Sinha ◽  
Hind Alkandry ◽  
Martin Kearney-Fischer ◽  
Mo Samimy ◽  
Tim Colonius
Keyword(s):  
Impulse Response ◽  
High Speed ◽  
Plasma Actuators ◽  
Filament Plasma

On the Development of Localized Arc Filament Plasma Actuators for High Speed Flow Control

2009 ◽  
Author(s):  
Jin-Hwa Kim ◽  
Munetake Nishihara ◽  
S Keshav ◽  
Igor Adamovich ◽  
Mo Samimy ◽  
...  
Keyword(s):  
Flow Control ◽  
High Speed ◽  
Plasma Actuators ◽  
High Speed Flow ◽  
Speed Flow ◽  
Filament Plasma

Characterization of Localized Arc Filament Plasma Actuators Used for High-speed Flow Control

2007 ◽  
Author(s):  
Yurii Utkin ◽  
Saurabh Keshav ◽  
Jin-Hwa Kim ◽  
Jeff Kastner ◽  
Igor Adamovich ◽  
...  
Keyword(s):  
Flow Control ◽  
High Speed ◽  
Plasma Actuators ◽  
High Speed Flow ◽  
Speed Flow ◽  
Filament Plasma

High-Speed and High-Reynolds-Number Jet Control Using Localized Arc Filament Plasma Actuators

2012 ◽  
Vol 28 (2) ◽  
pp. 269-280 ◽  
Author(s):  
M. Samimy ◽  
M. Kearney-Fischer ◽  
J.-H. Kim ◽  
A. Sinha
Keyword(s):  
Reynolds Number ◽  
High Speed ◽  
High Reynolds Number ◽  
Plasma Actuators ◽  
Jet Control ◽  
High Reynolds ◽  
Filament Plasma

Active Control of High Speed Jets Using Localized Arc Filament Plasma Actuators

2004 ◽  
Author(s):  
M. Samimy ◽  
I. Adamovich ◽  
B. Webb ◽  
S. Keshav ◽  
J.-H. Kim ◽  
...  
Keyword(s):  
Active Control ◽  
High Speed ◽  
Plasma Actuators ◽  
Filament Plasma

Development and use of localized arc filament plasma actuators for high-speed flow control

2007 ◽  
Vol 40 (3) ◽  
pp. 685-694 ◽  
Author(s):  
Yurii G Utkin ◽  
Saurabh Keshav ◽  
Jin-Hwa Kim ◽  
Jeff Kastner ◽  
Igor V Adamovich ◽  
...  
Keyword(s):  
Flow Control ◽  
High Speed ◽  
Plasma Actuators ◽  
High Speed Flow ◽  
Speed Flow ◽  
Filament Plasma

Rotordynamics Performance of Hybrid Foil Bearing Under Forced Vibration Input

2017 ◽  
Author(s):  
Daejong Kim ◽  
Brian Nicholson ◽  
Lewis Rosado ◽  
Garry Givan
Keyword(s):  
Impulse Response ◽  
High Speed ◽  
Load Capacity ◽  
Supply System ◽  
Forced Response ◽  
Experimental Results ◽  
Lateral Acceleration ◽  
Foil Bearings ◽  
Foil Bearing ◽  
Gas Supply

Foil bearings are one type of hydrodynamic air/gas bearings but with a compliant bearing surface supported by structural material that provides stiffness and damping to the bearing. The hybrid foil bearing (HFB) in this paper is a combination of a traditional hydrodynamic foil bearing with externally-pressurized air/gas supply system to enhance load capacity during the start and to improve thermal stability of the bearing. The HFB is more suitable for relatively large and heavy rotors where rotor weight is comparable to the load capacity of the bearing at full speed and extra air/gas supply system is not a major added cost. With 4,448N∼22,240N thrust class turbine aircraft engines in mind, the test rotor is supported by HFB in one end and duplex rolling element bearings in the other end. This paper presents experimental work on HFB with diameter of 102mm performed at the US Air force Research Laboratory. Experimental works include: measurement of impulse response of the bearing to the external load corresponding to rotor’s lateral acceleration of 5.55g, forced response to external subsynchronous excitation, and high speed imbalance response. A non-linear rotordynamic simulation model was also applied to predict the impulse response and forced subsynchronous response. The simulation results agree well with experimental results. Based on the experimental results and subsequent simulations, an improved HFB design is also suggested for higher impulse load capability up to 10g and rotordynamics stability up to 30,000rpm under subsynchronous excitation.

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