An Investigation of Flow Structure, Mixing and Chemical Reaction in Combusting Turbulent Flows.
Abstract
An experimental investigation of the relationship between flow structure and chemical reaction structure in a combusting turbulent flow has been initiated. The objective is to study the spatial structure of the unsteady reaction process as it relates to the unsteady velocity field. The configuration chosen for study is a co-flowing, non-premixed jet flame, with methane in the core flow and air in the surrounding flow. Initial experiments show that under suitable forcing conditions a very periodic and controllable flow suitable for conditional sampling can be produced. Preliminary results from single component velocity measurements indicate that when the jet is forced at a particular frequency the flame breaks up into a periodic series of flamelets and the flow acceleration and turbulence intensity on the jet axis is substantially reduced. Significant progress has been made in teh development of a planar laser-induced fluorescence technique for radical species visualization in the flame. Single-shot images of both CH and C2 fluorescence have been obtained in hydrocarbon-air flames.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1985
- Accession Number
- ADA173236
Entities
People
- Brian J. Cantwell
- Craig T. Bowman
Organizations
- Stanford University