LINEAR-EDDY MODELING OF TURBULENT TRANSPORT .4. STRUCTURE OF DIFFUSION FLAMES

被引：58

作者：

KERSTEIN, AR

机构：

[1] Combustion Research Facility, Sandia National Laboratories, Livermore, CA

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 1992年 / 81卷 / 1-3期

关键词：

D O I：

10.1080/00102209208951794

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A simulation model of the axial structure of turbulent jet diffusion flames is formulated for the purpose of interpreting flame-structure measurements. The model, based on the linear-eddy approach, incorporates spatial and temporal variation of the air entrainment rate, reflecting buoyancy effects, and an implementation of turbulent mixing using a novel stochastic representation of convective stirring in conjunction with Fick’s law governing molecular diffusion. Simulation results are compared to axial profiles of mixing-cup density measured in propane flames. The comparisons suggest that the measured Froude-number dependences reflect the combined effect of finite-rate mixing and the transition from forced to natural convection. Predictions for hydrogen flames are presented in order to assess the generality of inferences based on the propane results. © 1992, Taylor & Francis Group, LLC. All rights reserved.

引用

页码：75 / 96

页数：22

共 28 条

[1] THE EFFECT OF HOMOGENEOUS TURBULENCE ON MATERIAL LINES AND SURFACES [J].