Experimental Investigation of Flow Control on a High-Lift Wing Using Modulated Pulse Jet Vortex Generator
In this paper, the potential of a novel active flow control strategy by means of a modulated pulse jet vortex generator to enhance high-lift performance is demonstrated on a two-dimensional supercritical National Aeronautics and Space Administration (NASA) SC(2)-0714 airfoil with a single slotted trailing-edge flap at a high deflection angle. Fast-switching solenoid valves and compressed air were used as actuators to excite the flow. The vortex generator slot pairs were incorporated into the shoulder of the trailing-edge flap, where the flow separation occurs due to the high flow deflection and severe adverse pressure gradient. In these experiments, in addition to the simple square-wave excitation signal, a burst-modulated excitation signal as a novel pulse jet sequence was implemented to produce the unsteady blowing. The burst-modulation signal was used for the first time for a fast-switching solenoid valve actuator. The experiments were performed at a freestream velocity of 25 m/s with a corresponding Reynolds number of about 1×106 for a range of angles of attack from 0° to 20° at flap deflection angles from 0° to 35°. The results indicated that the ejection from vortex generator slot pairs was able to prevent flow separation completely in most conditions. These measurements revealed that the burst-modulated excitation was accompanied by more aerodynamic improvements and less air consumption relative to the simple pulsed jet excitation. In the best flow control mode, the results showed about a 12.6% increase in the lift coefficient and a 19.8% decrease in the drag coefficient.
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/08931321
-
Supplemental Notes:
- © 2022 American Society of Civil Engineers.
-
Authors:
- Abdolahipour, Soheila
- Mani, Mahmoud
- Taleghani, Arash Shams
- Publication Date: 2022-9
Language
- English
Media Info
- Media Type: Web
- Pagination: 05022001
-
Serial:
- Journal of Aerospace Engineering
- Volume: 35
- Issue Number: 5
- Publisher: American Society of Civil Engineers
- ISSN: 0893-1321
- EISSN: 1943-5525
- Serial URL: http://ascelibrary.org/journal/jaeeez
Subject/Index Terms
- TRT Terms: Aerodynamic lift; Boundary layer separation; Flow control (Air traffic control); Pulse generators; Vortices; Wings (Aircraft)
- Subject Areas: Aviation; Vehicles and Equipment;
Filing Info
- Accession Number: 01852773
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: Jul 25 2022 11:50AM