A Numerical Study on Transonic Shock Buffet Alleviation Through Oscillating Shock Control Bumps

2018 ◽  
Author(s):  
Jack A. Geoghegan ◽  
Nicholas F. Giannelis ◽  
Gareth A. Vio
Keyword(s):  
Numerical Study ◽  
Transonic Shock ◽  
Shock Control

scholarly journals Review of Adaptive Shock Control Systems

2021 ◽  
Vol 11 (2) ◽  
pp. 817
Author(s):  
Sven Christian Künnecke ◽  
Srinivas Vasista ◽  
Johannes Riemenschneider ◽  
Ralf Keimer ◽  
Markus Kintscher
Keyword(s):  
Aircraft Design ◽  
Low Complexity ◽  
Wave Drag ◽  
Point Of View ◽  
Transonic Shock ◽  
Shock Control ◽  
System Integrity ◽  
Near Term ◽  
System Benefit ◽  
Actuation Systems

Drag reduction plays a major role in future aircraft design in order to lower emissions in aviation. In transonic flight, the transonic shock induces wave drag and thus increases the overall aircraft drag and hence emissions. In the past decades, shock control has been investigated intensively from an aerodynamic point of view and has proven its efficacy in terms of reducing wave drag. Furthermore, a number of concepts for shock control bumps (SCBs) that can adapt their position and height have been introduced. The implementation of adaptive SCBs requires a trade-off between aerodynamic benefits, system complexity and overall robustness. The challenge is to find a system with low complexity which still generates sufficient aerodynamic improvement to attain an overall system benefit. The objectives of this paper are to summarize adaptive concepts for shock control, and to evaluate and compare them in terms of their advantages and challenges of their system integrity so as to offer a basis for robust comparisons. The investigated concepts include different actuation systems as conventional spoiler actuators, shape memory alloys (SMAs) or pressurized elements. Near-term applications are seen for spoiler actuator concepts while highest controllability is identified for concepts several with smaller actuators such as SMAs.

Experimental and Numerical Study of Oscillating Transonic Shock Waves in Ducts

AIAA Journal ◽  
2011 ◽  
Vol 49 (8) ◽  
pp. 1710-1720 ◽  
Author(s):  
P. J. K. Bruce ◽  
H. Babinsky ◽  
B. Tartinville ◽  
C. Hirsch
Keyword(s):  
Shock Waves ◽  
Numerical Study ◽  
Transonic Shock

A combined experimental and numerical study of flow structures over three-dimensional shock control bumps

2008 ◽  
Vol 12 (6) ◽  
pp. 436-447 ◽  
Author(s):  
W.S. Wong ◽  
N. Qin ◽  
N. Sellars ◽  
H. Holden ◽  
H. Babinsky
Keyword(s):  
Numerical Study ◽  
Three Dimensional ◽  
Flow Structures ◽  
Shock Control

Numerical Study of Transonic Shock Buffet Control over a Supercritical Airfoil

2020 ◽  
Vol 57 (6) ◽  
pp. 1242-1251
Author(s):  
Yuichi Kuya ◽  
Kenshiro Boda ◽  
Keisuke Sawada
Keyword(s):  
Numerical Study ◽  
Supercritical Airfoil ◽  
Transonic Shock
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