Experimental study of combustion in a turbulent boundary layer
H/sub 2/-air combustion in a heated turbulent boundary layer has been studied through time and space resolved measurements of velocity (laser Doppler anemometry) and density (Rayleigh scattering). The mean, rms fluctuation, probability density function and spectral density distribution of these measurements have been obtained. The experimental conditions covered equivalence ratios ranging from 0 to 0.2, wall temperatures from 1100 to 1300/sup 0/K and free stream velocities from 14 to 22 m/sec. The nominal boundary layer Reynolds number based on the free stream conditions was 1*1*10/sup 5/. Three modes of combustion in the boundary layer were found: 1) surface reaction, 2) surface and gas phase reaction in the boundary layer, and 3) a flame-like region situated at the edge of the boundary layer. Velocity fluctuations of about 6% in the non-heated boundary layer were increased to 10% by wall heating. 15 refs.
- Research Organization:
- Univ of Calif, Berkeley
- OSTI ID:
- 5450820
- Report Number(s):
- CONF-800809-
- Journal Information:
- Symp. (Int.) Combust., (Proc.); (United States), Journal Name: Symp. (Int.) Combust., (Proc.); (United States); ISSN SYMCA
- Country of Publication:
- United States
- Language:
- English
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