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Status report on a natural laminar-flow nacelle flight experiment
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Faust, G. K. Obara, Clifford J. Jones, Michael G. Schoenster, James A. Hastings Jr., Earl C. Dodbele, S. S. Mungur, Parma |
| Copyright Year | 1987 |
| Description | The natural laminar flow (NLF) nacelle experiment is part of a drag reduction production program, and has the dual objectives of studying the extent of NLF on full scale nacelles in a flight environment and the effect of acoustic disturbance on the location of transition on the nacelle surface. The experiment is being conducted in two phases: (1) an NLF fairing was flown on a full scale Citation nacelle to develop the experiment technique and establish feasibility; (2) full scale, flow through, NLF nacelles located below the right wing of an experimental NASA OV-1 aircraft are evaluated. The measurements of most interest are the static pressure distribution and transition location on the nacelle surface, and the fluctuating pressure levels associated with the noise sources. Data are collected in combinations of acoustic frequencies and sound pressure levels. The results of phase 2 tests to date indicate that on shape GE2, natural laminar flow was maintained as far aft as the afterbody joint at 50 percent of the nacelle length. An aft facing step at this joint caused premature transition at this station. No change was observed in the transition pattern when the noise sources were operated. |
| File Size | 2310154 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900003234 |
| Archival Resource Key | ark:/13960/t7kq2wp16 |
| Language | English |
| Publisher Date | 1987-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Design, Testing And Performance Viscous Drag Flight Tests Static Pressure Laminar Boundary Layer Drag Reduction Pressure Distribution Aerodynamic Noise Boundary Layer Transition Nacelles Acoustic Frequencies Boundary Layer Control Sound Pressure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
