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Review of Adaptive Shock Control Systems

Institute of Composite Structures and Adaptive Systems, German Aerospace Center (DLR), 38108 Brunswick, Germany
Program Aeronautics, German Aerospace Center (DLR), 38108 Brunswick, Germany
Author to whom correspondence should be addressed.
Appl. Sci. 2021, 11(2), 817;
Received: 18 December 2020 / Revised: 8 January 2021 / Accepted: 12 January 2021 / Published: 16 January 2021
(This article belongs to the Special Issue Smart Aircraft Morphing Technologies)
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. View Full-Text
Keywords: morphing wing; shock control bumps; adaptive spoiler; transonic drag reduction morphing wing; shock control bumps; adaptive spoiler; transonic drag reduction
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MDPI and ACS Style

Künnecke, S.C.; Vasista, S.; Riemenschneider, J.; Keimer, R.; Kintscher, M. Review of Adaptive Shock Control Systems. Appl. Sci. 2021, 11, 817.

AMA Style

Künnecke SC, Vasista S, Riemenschneider J, Keimer R, Kintscher M. Review of Adaptive Shock Control Systems. Applied Sciences. 2021; 11(2):817.

Chicago/Turabian Style

Künnecke, Sven Christian, Srinivas Vasista, Johannes Riemenschneider, Ralf Keimer, and Markus Kintscher. 2021. "Review of Adaptive Shock Control Systems" Applied Sciences 11, no. 2: 817.

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