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An investigation of drag reduction for tractor trailer vehicles
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Muirhead, V. U. |
| Copyright Year | 1978 |
| Description | Force and moment data were obtained from a one-twenty-fifth scale wind tunnel model of a cab-over-engine tractor trailer combination. The tests define the aerodynamic characteristics of the baseline (unmodified) vehicle and several modified configurations. The primary modifications consist of: (1) greatly increased forebody corner radii, (2) a smooth fairing over the cab-to-trailer gap, (3) a smoothed underbody, and (4) rear streamlining (boattailing)of the trailer. Tests were conducted for yaw angles from 0 deg to 30 deg. The reduction in drag, relative to the baseline, obtained by combining the modifications are compared for the zero yaw condition with full scale coast down drag results for similar configurations. The drag reductions obtained from the model and full scale tests are in good agreement. |
| File Size | 2435853 |
| Page Count | 61 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780025501 |
| Archival Resource Key | ark:/13960/t0sr3pb2c |
| Language | English |
| Publisher Date | 1978-10-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Drag Reduction Boattails Reynolds Number Wind Tunnel Tests Trailers Wind Tunnel Models Streamlining Aerodynamic Characteristics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
