Highly resolved measurements of scalar dissipation rates in turbulent piloted methane/air flames with compositionally inhomogeneous inlets were presented. There were many regions and flame conditions where the scalar dissipation results were similar for the fine and coarse data sets that includes downstream locations of cases with homogeneous inlets and high-temperature regions in the near field of flames with in- homogeneous inlets. At upstream locations for jets with homogeneous inlets as well as for the high-temperature regions of flames with inhomogeneous inlets both fine and coarse measurements of scalar dissipation rates yielded similar results giving confidence that measurements resolve the local dissipation scales. Downstream locations in homogeneous mixtures showed similar results for both coarse and fine measurements across all mixtures.
Bibliographical noteFunding Information:
Work at the University of Sydney was supported by the Australian Research Council. Work at Sandia was supported by the Division of Chemical Sciences, Geosciences and Biosciences, Office of Basic Energy Sciences, US Department of Energy. Sandia National Laboratories is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy under contract DE-AC04-94-AL85000. Contributions by Bob Harmon in support of these experiments are gratefully acknowledged.
- Inhomogeneous composition
- Partially premixed flames
- Scalar dissipation rates
- Turbulent flames
ASJC Scopus subject areas
- Chemical Engineering(all)
- Mechanical Engineering
- Physical and Theoretical Chemistry