Application of the Program Profile for the Design of Low-Speed, Low- Observable Configuration Airfoils
Abstract
This study investigated-the use of the program PROFILE for the design of low-speed, low-observable configuration airfoils. For our purposes, low- observable configuration is defined as being characterized by a small leading- edge radius of less than 1.18 percent chord and a thickness-to-chord ratio of 2. 5 to 5.5 percent. A methodology was developed whereby the input parameters to prescribe the velocity distribution over the airfoil could be determined by a power law relationship. This relationship enables the designer to develop symmetric airfoils with the desired thickness-to-chord and leading-edge radius within the stated constraints. The resulting symmetric airfoils compared very well with NACA 4-digit airfoils of like thickness-to-chord ratio. The resulting airfoils have an increased stall angle compared to the NACA 4-digit airfoils.... Low-Speed, Low-Observable, Symmetric Airfoils, Small Leading-Edge Radius, PROFILE, Small Thickness-to-Chord Ratio.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1992
- Accession Number
- ADA258842
Entities
People
- Gregory A. Sharp
Organizations
- Air Force Institute of Technology