| Title | Development of Predictive Wake Vortex Transport Model for Terminal Area Wake Vortex Avoidance |
|---|---|
| Record ID | 40461 |
| Personal Name Creator |
Brashears, M. R.; Zalay, A. D.; Chou, L. C.; Shrider, K. R. |
| Source | 232p. in various pagings |
| Corporate Creator | Lockheed Martin; John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Department of Transportation. Federal Aviation Administration |
| Publication Date | 19760501 |
| Language | English |
| Abstract | The wake vortex transport program has been expanded to include viscous effects and the influence of initial roll-up, atmospheric turbulence, and wind shear on the persistence and motion of wake vortices in terminal areas. Analysis of wake characteristics has shown that changes in the spanwise loading due to flaps increase the initial sink rate, decrease the separation, and initiate the circulation decay process earlier. Bouyancy due to jet exhaust entrainment and ambient stratification retards vortex spreading and increase descent. Atmospheric turbulence and shear promote a more rapid decay reducing the late-time desecent and spread rate of vortices. Vortex tilting has been related to an interaction involving the wind shear, ground plane, and the vorticity detrainment process. Recognition of the effects of tilting, spanwise loading, vorticity detrainment, burst/sink instabilities, and atmospheric conditions has resulted in an analytic wake transport and decay model with increased accuracy and improved predictive capabilities. |
| Public Note | Introduction, Development of predictive vortex transport model, Comparison of predicted and observed vortex tracks, Conclusions and recommendations, Appendices |
| Rosap ID | dot:9282 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9282 |
| TRT Terms | Fluid mechanics; Wind shear; Vortices; Meteorology; Aviation safety; Atmospheric turbulence; Wakes |
| General Subjects | Fluid mechanics; Wind shear; Vortices; Turbulence; Meteorology; Aviation safety; Atmospheric motion; Wakes |
| Classification | NTL - AVIATION - Air Traffic Control; NTL - AVIATION - Aviation Safety/Airworthiness; NTL - AVIATION - Aviation Energy and Environment |
| Geographical Coverage |
United States |
| OCLC | 227428400 |
| Contract Number | DOT-TSC-988 |
| Report Number | DOT-TSC-FAA-76-15; FAA-RD-76-94 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/40000/40400/40461/DOT-TSC-FAA-76-15.pdf |
| Format | |
| Database | NTL Digital Repository |