Assessment of simplified thermal radiation models for engineering calculations in natural gas-fired furnace

被引：37

作者：

Kontogeorgos, D. A. ^{[1
]}

Keramida, E. P. ^{[1
]}

Founti, M. A. ^{[1
]}

机构：

[1] Natl Tech Univ Athens, Sch Mech Engn, Dept Mech Engn,Thermal Engn Sect, Lab Heterogeneous Mixtures & Combust Syst, Athens 15780, Greece

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 25-26期

关键词：

radiation; natural gas furnaces; six-flux model; P-1; model;

D O I：

10.1016/j.ijheatmasstransfer.2007.06.011

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The paper assesses the significance of thermal radiation in turbulent non-premixed natural gas flames confined in axisymmetric furnaces. The in-house developed computational model includes simulation of the turbulent flow characteristics, the controlling Mixing and chemical mechanisms as well as radiation modeled via the six-flux and of the P-1 models. A variable absorption coefficient is taken into account for the gaseous combustion mixture based on temperature and composition of the mixture. The results with and without radiation are evaluated as part of the complete prediction procedure involving flow, combustion, convection, and radiation phenomena. The comparative assessment of the two radiation models against experimental data indicates that they can be easily applied in engineering cases, with the P-1 model yielding more accurate results in the case considered. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：5260 / 5268

页数：9

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