| Title | LDV measurements of B-747 wake vortex characteristics |
|---|---|
| Record ID | 61813 |
| Personal Name Creator |
Brashears, M. R.; Zalay, A. D. |
| Source | 227p. in various pagings |
| Corporate Creator | Lockheed Missiles & Space Company, Inc. |
| Corporate Contributor |
United States. Department of Transportation. Transportation Systems Center; United States. Department of Transportation. Federal Aviation Administration |
| Publisher | United States. Department of Transportation. Federal Aviation Administration |
| Publication Date | 19770100 |
| Language | English |
| Abstract | In order to determine the behavior of the wake vortices of a B-747 at low altitudes and to measure the vortex decay process behind the B-747 as a function of altitude above ground, flap and spoiler settings and different flight configurations; a B-747 aircraft flew 54 passes at low level over a ground-based laser Doppler velocimeter (LDV) system and other sensors. From the LDV measurements, the location and velocity distribution of the wake vortices and the general vortex roll-up, transport and decay trends were obtained. Results of the study indicated that the deployment of spoilers and flaps enhanced the decay of the vortex peak tangential velocity in the near wake while aircraft altitude glide slope, and landing gear deployment has little effect. The report discusses the LDV wake vortex measurements including the instrumentation used, the experimental test sequence, and the results of the wake measurements in terms of the vortex roll-up, transport and decay trends, and a comparison of the wake vortex characteristics for different configurations. |
| Rosap ID | dot:12483 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/12483 |
| TRT Terms | Wakes; Vortices; Laser doppler velocimeters; Measurement of specific phenomena; Instrumentation |
| General Subjects | Boeing 737 |
| Classification | NTL - AVIATION - AVIATION; NTL - AVIATION - Aviation Safety/Airworthiness; NTL - AVIATION - Air Traffic Control |
| Geographical Coverage |
California |
| TRIS Online Accession No |
1637985 |
| Contract Number | DOT-TSC-1145; FA-605/705 |
| Report Number | LMSC-HREC TR D496975 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/61000/61800/61813/LockheadRosamondLakeReport_747Vortices.pdf |
| Format | |
| Database | NTL Digital Repository |