Near-field turbulent structures and the local extinction of jet diffusion flames

1992 ◽  
Vol 24 (1) ◽  
pp. 351-359 ◽  
Author(s):  
Fumiaki Takahashi ◽  
Larry P. Goss
1995 ◽  
Author(s):  
Fumiaki Takahashi ◽  
W Schmoll ◽  
Darryl Trump ◽  
Larry Goss

1996 ◽  
Vol 118 (4) ◽  
pp. 877-884 ◽  
Author(s):  
F. Takahashi ◽  
M. D. Vangsness ◽  
M. D. Durbin ◽  
W. J. Schmoll

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.


1997 ◽  
Author(s):  
S. Noda ◽  
Y. Kamitakahara ◽  
S. Kamiya ◽  
Y. Onuma ◽  
S. Noda ◽  
...  

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