Baroclinic vortex influence on wave drag reduction induced by pulse energy deposition

2009 ◽  
Vol 21 (6) ◽  
pp. 066102 ◽  
Author(s):  
Yousuke Ogino ◽  
Naofumi Ohnishi ◽  
Shinichi Taguchi ◽  
Keisuke Sawada
Keyword(s):  
Drag Reduction ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Wave Drag ◽  
Wave Drag Reduction

Blunt-body wave drag reduction using focused energy deposition

AIAA Journal ◽  
1999 ◽  
Vol 37 ◽  
pp. 460-467 ◽  
Author(s):  
David Riggins ◽  
H. F. Nelson ◽  
Eric Johnson
Keyword(s):  
Drag Reduction ◽  
Energy Deposition ◽  
Blunt Body ◽  
Body Wave ◽  
Wave Drag ◽  
Wave Drag Reduction

Blunt-Body Wave Drag Reduction Using Focused Energy Deposition

AIAA Journal ◽  
10.2514/2.756 ◽  
1999 ◽  
Vol 37 (4) ◽  
pp. 460-467 ◽  
Author(s):  
David Riggins ◽  
H. F. Nelson ◽  
Eric Johnson
Keyword(s):  
Drag Reduction ◽  
Energy Deposition ◽  
Blunt Body ◽  
Body Wave ◽  
Wave Drag ◽  
Wave Drag Reduction

Wave Drag Reduction with Acting Spike Induced by Laser-Pulse Energy Depositions

AIAA Journal ◽  
2011 ◽  
Vol 49 (9) ◽  
pp. 2076-2078 ◽  
Author(s):  
Jae-Hyung Kim ◽  
Atsushi Matsuda ◽  
Takeharu Sakai ◽  
Akihiro Sasoh
Keyword(s):  
Laser Pulse ◽  
Drag Reduction ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Wave Drag ◽  
Wave Drag Reduction

Drag Reduction Performance due to Repetitive Laser Pulses on the Blunt Body

2011 ◽  
Author(s):  
Jae-Hyung Kim ◽  
Akihiro Sasoh
Keyword(s):  
Drag Reduction ◽  
High Speed ◽  
Energy Deposition ◽  
Blunt Body ◽  
Laser Pulses ◽  
Wave Drag ◽  
Force Balance ◽  
Balance System ◽  
Convex Lens ◽  
Wave Drag Reduction

Supersonic wave drag reduction due to the repetitive laser induced energy deposition is performed experimentally in this study. Laser pulses are irradiated through a convex lens installed in side of the in-draft wind tunnel of Mach 1.94. The maximum frequency and power of the energy deposition is limited up to 50kHz and 400W. In order to estimate the drag reduction, time-averaged drag force is measured by a force balance system and stagnation pressure history is synchronized with corresponding sequential schlieren images captured by high-speed camera. Drag reduction performance is linearly increased up to 21% with input laser power. The power gain which only depends on the pulse energy, is realized by approximately 7. Virtual spike formation induced by highrepetitive energy depositions is remarkably discussed in the visualization results.

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