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Title: Reaction and diffusion in turbulent combustion. Progress report

Abstract

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.

Authors:
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10165611
Report Number(s):
DOE/ER/14128-T1
ON: DE93017085
DOE Contract Number:  
FG02-90ER14128
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 18 Jun 1993
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; COMBUSTION; TURBULENT FLOW; PROGRESS REPORT; MIXING; DIFFUSION; NUMERICAL SOLUTION; COMPUTERIZED SIMULATION; 400800; COMBUSTION, PYROLYSIS, AND HIGH-TEMPERATURE CHEMISTRY

Citation Formats

Pope, S B. Reaction and diffusion in turbulent combustion. Progress report. United States: N. p., 1993. Web. doi:10.2172/10165611.
Pope, S B. Reaction and diffusion in turbulent combustion. Progress report. United States. https://doi.org/10.2172/10165611
Pope, S B. 1993. "Reaction and diffusion in turbulent combustion. Progress report". United States. https://doi.org/10.2172/10165611. https://www.osti.gov/servlets/purl/10165611.
@article{osti_10165611,
title = {Reaction and diffusion in turbulent combustion. Progress report},
author = {Pope, S B},
abstractNote = {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.},
doi = {10.2172/10165611},
url = {https://www.osti.gov/biblio/10165611}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 18 00:00:00 EDT 1993},
month = {Fri Jun 18 00:00:00 EDT 1993}
}