Circulation Control Technology Applied to Propulsive High Lift Systems 841497
Technology developed for the Circulation Control Wing high-lift system has been extended to augment lift by entraining and redirecting engine thrust. Ejecting a thin jet sheet tangentially over a small curved deflecting surface adjacent to the slipstream of a turbofan engine causes the slipstream to flow around that deflecting surface. The angle of deflection is controlled pneumatically by varying the momentum of the thin jet sheet. The downward momentum of the slipstream enhances wing lift. This concept of pneumatically deflecting the slipstream has been applied to an upper surface blowing high-lift system and to a thrust deflecting system. The capability of the pneumatic upper surface blowing system was demonstrated in a series of investigations using a wind tunnel model and the NASA Quiet Short-haul Research Aircraft (QSRA). Full-scale thrust deflections greater than 90 deg were achieved. This mechanically simple system can provide increased maneuverability, heavy lift or overload capability, or short takeoff and landing performance.
Citation: Englar, R., Nichols, J., Harris, M., Eppel, J. et al., "Circulation Control Technology Applied to Propulsive High Lift Systems," SAE Technical Paper 841497, 1984, https://doi.org/10.4271/841497. Download Citation
Author(s):
Robert J. Englar, James H. Nichols, Michael J. Harris, Joseph C. Eppel, Michael D. Shovlin
Affiliated:
Aircraft Division, David Taylor Naval Ship R&D Center, Bethesda, MD, National Aeronautics & Space Administration, Ames Research Center, Moffett Field, CA
Pages: 16
Event:
Aerospace Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
V/Stol--An Update and Overview-SP-0591
Related Topics:
Turbofan engines
Wind tunnel tests
Aircraft
Thrust
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