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Spray Combustion Spectral Characteristics FREE

[+] Author Affiliations
S. S. Chang, T. S. Lee, H. H. Chiu

National Cheng Kung University, Tainan, Taiwan, R.O.C.

Paper No. 97-AA-143, pp. V001T13A084; 11 pages
doi:10.1115/97-AA-143
From:
  • ASME 1997 Turbo Asia Conference
  • ASME 1997 Turbo Asia Conference
  • Singapore, September 30–October 2, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7867-5
  • Copyright © 1997 by ASME

abstract

Spray combustion in an axisymmetric combustor is analyzed numerically with three droplet models; (1) Ranz and Marshall droplet law (2) droplet laws by canonical droplet theory, accounting for the droplet blowing effect and flow convecting effect, and (3) renormalized canonical droplet theory, which accounts for the drop-drop short range interaction as well as convection and blowing. Results are compared to assess the effects of the droplet models on the combustion and aerodynamic characteristics of a spray. The concept of droplet state spectra are proposed to aid in understanding the state of droplet and its evolution at different locations. Spray combustion is classified into “core combustion”, “transition combustion”, and “wall-bound combustion” patterns, with “transition combustion” spray generally giving the highest combustion efficiency for a given mass flow rate and mixture ratio.

Copyright © 1997 by ASME
Topics: Combustion , Sprays
This article is only available in the PDF format.

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