Accession Number : ADA258842


Title :   Application of the Program Profile for the Design of Low-Speed, Low- Observable Configuration Airfoils


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Sharp, Gregory A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258842.pdf


Report Date : Dec 1992


Pagination or Media Count : 216


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.


Descriptors :   *OBSERVATION , *AIRFOILS , VELOCITY , INPUT , ANGLES , METHODOLOGY , PROFILES , LEADING EDGES , POWER , CONFIGURATIONS , RATIOS , THICKNESS , DISTRIBUTION , PARAMETERS , EDGES


Subject Categories : Aircraft


Distribution Statement : APPROVED FOR PUBLIC RELEASE