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RESEARCH PAPERS: Forced Convection

Structure of Turbulent Hydrogen Jet Diffusion Flames With or Without Swirl

[+] Author and Article Information
F. Takahashi, M. D. Vangsness, M. D. Durbin, W. J. Schmoll

University of Dayton, Research Institute, 300 College Park, Dayton, OH 45469

J. Heat Transfer 118(4), 877-884 (Nov 01, 1996) (8 pages) doi:10.1115/1.2822583 History: Received November 27, 1995; Revised May 14, 1996; Online December 05, 2007

Abstract

The near-field turbulent structure of double-concentric hydrogen-air jet diffusion flames, with or without swirl, has been investigated using conditionally sampled, three-component laser-Doppler velocimetry and coherent anti-Stokes Raman spectroscopy. The turbulent flame zone became thinner and shifted inward as the mean jet velocity was increased, whereas swirl created a radial velocity even at the jet-exit plane, thereby broadening and shifting the flame zone outward. The probability-density functions of velocity components, their 21 moments (up to fourth order), mean temperature, and root-mean-square temperature fluctuation were determined in the near field. The data can be used to validate advanced turbulent combustion models.

Copyright © 1996 by The American Society of Mechanical Engineers
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