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An investigation of the feasibility of active boundary layer thickening for aircraft drag reduction
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Koodalattupuram, C. Ash, R. L. |
| Copyright Year | 1986 |
| Description | The feasibility of using a forward mounted windmilling propeller to extract momentum from the flow around an axisymmetric body to reduce total drag has been studied. Numerical calculations indicate that a net drag reduction is possible when the energy extracted is returned to an aft mounted pusher propeller. However, net drag reduction requires very high device efficiencies. Results of an experimental program to study the coupling between a propeller wake and a turbulent boundary layer are also reported. The experiments showed that a complex coupling exists and simple modes for the flow field are not sufficiently accurate to predict total drag. |
| File Size | 439525 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860018592 |
| Archival Resource Key | ark:/13960/t15n13j6v |
| Language | English |
| Publisher Date | 1986-04-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Pressure Drag Propeller Slipstreams Propellers Drag Reduction Skin Friction Transport Aircraft Friction Drag Wind Tunnel Tests Turbulent Boundary Layer Flow Characteristics Flow Velocity Coupling Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
