Non-Reacting and Combusting Flow Investigation of Bluff Bodies in Cross Flow (Postprint)
Abstract
This paper is the first in a series of papers studying the behavior of bluff body stabilized flames. In this research a combination of Laser Doppler Velocimetry (LDV), and High Speed Imaging are used to investigate these flames. LDV data taken over several non-combusting operating conditions detail the recirculation zone behind the bluff body as well as the effect of inlet conditions on the Karman Street vortex shedding that occurs. High speed images of combustion and equivalence ratio taken at blow out agree with assertions made by Ozawa (1971) and Zukoski (1957) on the transitional nature of the flame from "laminar" to "turbulent" at a Reynolds number of around 15,000. Lean blow out also correlate very well when using the correlation parameter set down by Dezubay (1950). Finally, high speed images also support assertions by Mehta and Soteriou (2003) Erickson et al. (2006) that under certain conditions Karman Street vortex shedding is not suppressed by momentum and baroclinic effects and are present in the flame near lean blowout.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2007
- Accession Number
- ADA473728
Entities
People
- Amy Lynch
- Barry Kiel
- James. R. Gord
- Kyle Garwick
- Terrence R Meyer
Organizations
- Air Force Research Laboratory