One objective of the European Projects AFLoNext and Clean Sky 2 is to apply Active Flow Control (AFC) on the
airframe in critical aerodynamic areas such as the engine/wing junction or the outer wing region for being able to locally
improve the aerodynamics in certain flight conditions. At the engine/wing junction, AFC is applied to alleviate or even
eliminate flow separation at low speeds and high angle of attacks likely to be associated with the integration of underwing-
mounted Ultra High Bypass Ratio (UHBR) engines and the necessary slat-cut-outs. At the outer wing region, AFC
can be used to allow more aggressive future wing designs with improved performance. A relevant part of the work on
AFC concepts for airframe application is the development of suitable actuators. Fluidic Actuated Flow Control (FAFC)
has been introduced as a Flow Control Technology that influences the boundary layer by actively blowing air through
slots or holes out of the aircraft skin. FAFC actuators can be classified by their Net Mass Flux and accordingly divided
into ZNMF (Zero Net Mass Flux) and NZNMF (Non Zero Net-Mass-Flux) actuators. In the frame of both projects, both
types of the FAFC actuator concepts are addressed. In this paper, the objectives of AFC on the airframe is presented and
the actuators that are used within the project are discussed.
M. Schueller, P. Weigel, M. Lipowski, M. Meyer, P. Schlösser, and M. Bauer, "Fluidic actuators for active flow control on airframe," Proc. SPIE 9801, Industrial and Commercial Applications of Smart Structures Technologies 2016, 980103 (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 21, 2016; Published: 16 April 2016); https://doi.org/10.1117/12.2219175.
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