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An improved panel method for the solution of three-dimensional leading-edge vortex flows. volume 1: theory document
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Tinoco, E. N. Johnson, F. T. Lu, P. |
| Copyright Year | 1980 |
| Description | An improved panel method for the solution of three dimensional flow and wing and wing-body combinations with leading edge vortex separation is presented. The method employs a three dimensional inviscid flow model in which the configuration, the rolled-up vortex sheets, and the wake are represented by quadratic doublet distributions. The strength of the singularity distribution as well as shape and position of the vortex spirals are computed in an iterative fashion starting with an assumed initial sheet geometry. The method calculates forces and moments as well as detail surface pressure distributions. Improvements include the implementation of improved panel numerics for the purpose of elimination the highly nonlinear effects of ring vortices around double panel edges, and the development of a least squares procedure for damping vortex sheet geometry update instabilities. A complete description of the method is included. A variety of cases generated by the computer program implementing the method are presented which verify the mathematical assumptions of the method and which compare computed results with experimental data to verify the underlying physical assumptions made by the method. |
| File Size | 4936005 |
| Page Count | 125 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800018783 |
| Archival Resource Key | ark:/13960/t0gv0dk5r |
| Language | English |
| Publisher Date | 1980-07-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Three Dimensional Flow Vortices Angle of Attack Separated Flow Aerodynamic Characteristics Three Dimensional Models Leading Edges Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
