Combustion-turbulence interaction in the turbulent boundary layer over a hot surface

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The turbulence-combustion interaction in a reacting turbulent boundary layer over a heated flat plate was studied. Ethylene/air mixture with equivalence ratio of 0.35 was used. The free stream velocity was 10.5 m/s and the wall temperature was 1250/sup 0/K. Combustion structures visualization was provided by high-speed schlieren photographs. Fluid density statistics were deduced from Rayleigh scattering intensity measurements. A single-component laser Doppler velocimetry system was used to obtain mean and root-mean-square velocity distributions, the Reynolds stress, the streamwise and the cross-stream turbulent kinetic energy diffusion, and the production of turbulent kinetic energy by Reynolds stress. The combustion process was dominated ... continued below

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Pages: 31

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Ng, T.T.; Cheng, R.K.; Robben, F. & Talbot, L. January 1, 1982.

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The turbulence-combustion interaction in a reacting turbulent boundary layer over a heated flat plate was studied. Ethylene/air mixture with equivalence ratio of 0.35 was used. The free stream velocity was 10.5 m/s and the wall temperature was 1250/sup 0/K. Combustion structures visualization was provided by high-speed schlieren photographs. Fluid density statistics were deduced from Rayleigh scattering intensity measurements. A single-component laser Doppler velocimetry system was used to obtain mean and root-mean-square velocity distributions, the Reynolds stress, the streamwise and the cross-stream turbulent kinetic energy diffusion, and the production of turbulent kinetic energy by Reynolds stress. The combustion process was dominated by large-scale turbulent structures of the boundary layer. Combustion causes expansion of the boundary layer. No overall self-similarity is observed in either the velocity or the density profiles. Velocity fluctuations were increased in part of the boundary layer and the Reynolds stress was reduced. The turbulent kinetic energy diffusion pattern was changed significantly and a modification of the boundary layer assumption will be needed when dealing with this problem analytically. 11 figures, 1 table.

Physical Description

Pages: 31

Notes

NTIS, PC A03/MF A01.

Source

  • 19. international symposium on combustion, Haifa, Israel, 8 Aug 1982

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  • Other: DE82011780
  • Report No.: LBL-13893
  • Report No.: CONF-820801-8
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 5260306
  • Archival Resource Key: ark:/67531/metadc1063653

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1982

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • April 25, 2018, 3:55 p.m.

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Ng, T.T.; Cheng, R.K.; Robben, F. & Talbot, L. Combustion-turbulence interaction in the turbulent boundary layer over a hot surface, article, January 1, 1982; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1063653/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.