Low-Speed Characteristics of a Circulation Control Airfoil with AFT camber and a Spiral Trailing Edge
Abstract
A circulation control elliptic airfoil section with a 15-percent thickness-to-chord ratio which incorporates a spiral trailing edge was evaluated subsonically to determine its aerodynamic characteristics. The spiral-shaped Coanda surface was previously evaluated with a different leading edge. The airfoil, designated NCCR 1505-7567S, has an uncambered forward half and a cambered aft portion resulting in a 0.005-percent camber for the profile. This particular combination of camber was selected because it was analytically predicted to have good critical Mach number characteristics in the range of interest. The range of momentum coefficient was limited due to the relatively early onset of Coanda jet-tunnel floor interference; however, lift coefficients in the excess of 4.25 were produced at momentum coefficients of 0.16. Equivalent lift-to-drag ratios in excess of 40 were also produced when lift coefficient reached approximately 1.0. Originator-supplied keywords include: Two-dimensional Wind tunnel testing, Tangential blowing and Boundary layer control.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA150851
Entities
People
- David W Taylor
- Jana Abramson