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Computer programs for smoothing and scaling airfoil coordinates
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Morgan Jr., H. L. |
| Copyright Year | 1983 |
| Description | Detailed descriptions are given of the theoretical methods and associated computer codes of a program to smooth and a program to scale arbitrary airfoil coordinates. The smoothing program utilizes both least-squares polynomial and least-squares cubic spline techniques to smooth interatively the second derivatives of the y-axis airfoil coordinates with respect to a transformed x-axis system which unwraps the airfoil and stretches the nose and trailing-edge regions. The corresponding smooth airfoil coordinates are then determined by solving a tridiagonal matrix of simultaneous cubic-spline equations relating the y-axis coordinates and their corresponding second derivatives. A technique for computing the camber and thickness distribution of the smoothed airfoil is also discussed. The scaling program can then be used to scale the thickness distribution generated by the smoothing program to a specific maximum thickness which is then combined with the camber distribution to obtain the final scaled airfoil contour. Computer listings of the smoothing and scaling programs are included. |
| File Size | 5159198 |
| Page Count | 190 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19850022698 |
| Archival Resource Key | ark:/13960/t3b040c62 |
| Language | English |
| Publisher Date | 1983-07-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Thickness Aerodynamic Configurations Smoothing Least Squares Method Coordinates Scaling Laws Spline Functions Airfoils Polynomials Computer Programs Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
