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An approach to the constrained design of natural laminar flow airfoils
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Green, Bradford E. |
| Copyright Year | 1997 |
| Description | A design method has been developed by which an airfoil with a substantial amount of natural laminar flow can be designed, while maintaining other aerodynamic and geometric constraints. After obtaining the initial airfoil's pressure distribution at the design lift coefficient using an Euler solver coupled with an integral turbulent boundary layer method, the calculations from a laminar boundary layer solver are used by a stability analysis code to obtain estimates of the transition location (using N-Factors) for the starting airfoil. A new design method then calculates a target pressure distribution that will increase the laminar flow toward the desired amount. An airfoil design method is then iteratively used to design an airfoil that possesses that target pressure distribution. The new airfoil's boundary layer stability characteristics are determined, and this iterative process continues until an airfoil is designed that meets the laminar flow requirement and as many of the other constraints as possible. |
| File Size | 2919892 |
| Page Count | 78 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970019686 |
| Archival Resource Key | ark:/13960/t6zw6cv23 |
| Language | English |
| Publisher Date | 1997-02-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Commuter Aircraft Pitching Moments Stability Subsonic Speed Transport Aircraft Pressure Distribution Turbulent Boundary Layer Airfoils Design Analysis Lift Laminar Boundary Layer Iterative Solution Laminar Flow Trailing Edges Boundary Layer Transition Gliders 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 |
