EXPERIMENTAL INVESTIGATION OF THE WALL PRESSURE FLUCTUATIONS IN SUBSONIC SEPARATED FLOWS
Abstract
Experimental measurements of static pressures, fluctuating wall pressures, and mean velocity profiles are presented for subsonic turbulent separated flows. Separation was induced by three types of geometrical configurations: Backward-facing steps 1/2, 1, and 1-1/2 inches high; forward- facing steps 1/2 and 1 inch high; and fences 1/2 and 1 inch high. Measurements were made for free stream velocities of 170, 280, and 370 ft/sec. It was found that the base pressure was essentially Reynolds number independent. The separation length was independent of speed and proportional to the height of the configuration causing flow separation. The wall pressure fluctuations associated with the separated flows were of higher magnitudes than those caused by attached turbulent boundary layers and reached maximum values near reattachment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 26, 1967
- Accession Number
- AD0669214
Entities
People
- A. M. Mohsen
Organizations
- Boeing Commercial Airplanes