Differential molecular diffusion in a hydrogen-rich jet

被引：3
|
作者：
Sannan, Sigurd [1 ]
Kerstein, Alan R. [2 ]
机构：
[1] SINTEF Energy Res, POB 4761 Sluppen, N-4761 Trondheim, Norway
[2] 72 Lomitas Rd, Danville, CA 94526 USA
来源：
8TH TRONDHEIM CONFERENCE ON CO2 CAPTURE, TRANSPORT AND STORAGE | 2016年 / 86卷
关键词：
differential diffusion; hydrogen; turbulent combustion; turbulent mixing; DIRECT NUMERICAL-SIMULATION; ONE-DIMENSIONAL TURBULENCE; TRANSPORT; FLAMES; FLOWS; AIR;
D O I：
10.1016/j.egypro.2016.01.031
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Differential molecular diffusion effects are expected to be of particular importance in the combustion of hydrogen and H-2-enriched fuels. The mixing between fuel and oxidizer can be significantly influenced, implying changed chemical reaction rates and overall heat release. Here, the LEM3D model based on the Linear Eddy Model (LEM) is employed to simulate differential diffusion effects in a turbulent round jet of H-2 and Freon 22 issuing into air. Input to LEM3D, generated from ANSYS Fluent, consists of velocity profiles and profiles for the turbulent diffusivity, the Kolmogorov scale and the integral length scale. In this paper, the LEM3D-Fluent coupling is demonstrated by a coarse steady-state RANS simulation in Fluent with a one-to-one correspondence between the RANS grid cells and the LEM3D control volumes. The LEM3D simulation results are compared with previously obtained measurements of differential molecular diffusion for the given flow configuration. (C) 2015 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：304 / 314
页数：11
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