Upstream Mixing Cavity Coupled with a Downstream Flameholding Cavity Behavior in Supersonic Flow (Postprint)
Abstract
Experimental investigations of the flowfield associated with three upstream direct injection acoustic resonance cavities coupled with a previously designed downstream combustion cavity in a non-reacting flow are described. All of the upstream mixing cavities were acoustically open (shear layer reattachment on the downstream wall of the cavity) with the length-to-depth ratio (L/D) on the order of 1. The previously established downstream combustion cavity had an L/D of 4.7 and an aft ramp angle of 22.5 degrees. The three upstream mixing cavities were characterized in Mach 2 freestream flow with injection at three locations (upstream wall, center, downstream wall) within each cavity. Injection at the upstream wall of the cavity provided greater penetration height into the freestream as well as faster mixing with the freestream compared with injection at the center or downstream wall of the cavity. Injection at the center of the cavity resulted in the injectant diffusing laterally in the cavity before being ejected into the freestream. Injection at the downstream cavity wall displayed characteristics of both injection at the upstream wall and center of the cavity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2005
- Accession Number
- ADA463678
Entities
People
- Adam Quick
- Campbell D. Carter
- Kuang-yu Hsu
- Mark R. Gruber
- Paul I. King
Organizations
- Air Force Institute of Technology