Analysis of Cavity Passive Flow Control High Speed Shadowgraph Images (Postprint)
Abstract
An examination of a rectangular cavity with an L/D of 5.67 was tested at Mach 0.7 with a corresponding Reynolds number of 2x10(exp 6)/ft. High speed shadowgraph movies were simultaneously sampled with dynamic pressure sensors at 75 kHz. Fourier analysis was performed on the high speed movies as well as the dynamic pressure data, which resulted in determining the locations of dominant cavity frequencies in the flow field. Five passive flow control devices were tested, three of which have historically preformed well, while two neither reduced the main acoustic tones nor reduced the broadband levels. From the high speed shadowgraph movies, observations are made in the changes in the cavity flow physics when the passive flow control devices are used, and will be discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2011
- Accession Number
- ADA579373
Entities
People
- Anwar Ahmed
- Frank Semmelmayer
- James E. Grove
- Mitchell Haverkamp
- Ryan F. Schmit
Organizations
- Air Force Research Laboratory