Reaction and diffusion in turbulent combustion. Progress report
A class of turbulent combustion models known as PDF methods has been developed. These methods have the important virtue that both convection and reaction can be treated without turbulence-modelling assumptions. However, a mixing model is required to account for the effects of molecular diffusion. Currently, the available mixing models are known to have some significant defects. Motivation of the project is to seek a better understanding of molecular diffusion in turbulent reactive flows; and thereby to provide guidance to the development of improved mixing models. Principal approach taken in the research is to use Direct Numerical Simulations (DNS) to study the coupled processes of reaction and molecular mixing in turbulent combustion. Because of inevitable computational limitations, it is impossible to simulate turbulent combustion in the parameter range of practical interest. Instead, our approach is to study very simple turbulent reactive flows that contain qualitatively some of the same phenomena as real flames. Statistical models will be developed that are applicable to practical combustion devices. The DNS studies related to non-premixed combustion are described. An additional topic studied, was mixing from the viewpoint of relative molecular motion.
- Research Organization:
- Cornell Univ., Ithaca, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-90ER14128
- OSTI ID:
- 10165611
- Report Number(s):
- DOE/ER/14128-T1; ON: DE93017085
- Resource Relation:
- Other Information: PBD: 18 Jun 1993
- Country of Publication:
- United States
- Language:
- English
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