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Turbulent-spot growth characteristics: wind-tunnel and flight measurements of natural transition at high reynolds and mach numbers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jones, T. V. Clark, J. P. LaGraff, J. E. |
| Copyright Year | 2007 |
| Description | A series of experiments are described which examine the growth of turbulent spots on a flat plate at Reynolds and Mach numbers typical of gas-turbine blading. A short-duration piston tunnel is employed and rapid-response miniature surface-heat-transfer gauges are used to asses the state of the boundary layer. The leading- and trailing-edge velocities of spots are reported for different external pressure gradients and Mach numbers. Also, the lateral spreading angle is determined from the heat-transfer signals which demonstrate dramatically the reduction in spot growth associated with favorable pressure gradients. An associated experiment on the development of turbulent wedges is also reported where liquid-crystal heat-transfer techniques are employed in low-speed wind tunnel to visualize and measure the wedge characteristics. Finally, both liquid crystal techniques and hot-film measurements from flight tests at Mach number of 0.6 are presented. |
| File Size | 362522 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070038953 |
| Archival Resource Key | ark:/13960/t4sj6fs7w |
| Language | English |
| Publisher Date | 2007-03-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics High Reynolds Number Flight Tests Turbulence Subsonic Speed Flat Plates Liquid Crystals Pressure Gradients Spreading Wind Tunnel Tests Miniaturization Heat Transfer Boundary Layers Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
