| 纤维质燃料填充床正向阴燃传播特性的数值模拟 |
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| 引用本文： | 贾宝山,解茂昭,刘红.纤维质燃料填充床正向阴燃传播特性的数值模拟[J].上海大学学报(英文版),2008,12(2):171-179. |
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| 作者姓名： | 贾宝山 解茂昭 刘红 |
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| 作者单位： | JIA Bao-shan（School of Energy and Power, Daiian University of Technology, Dalian 116024, P. R. China;College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, P. R. China）
XIE Mao-zhao（School of Energy and Power, Daiian University of Technology, Dalian 116024, P. R. China）
LIU Hong（School of Energy and Power, Daiian University of Technology, Dalian 116024, P. R. China） |
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| 摘 要： |
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| 关 键 词： | forward smoldering inlet air velocity smoldering velocity pre-exponential factor. 纤维质 燃料 填充床 阴燃 传播特性 数值模拟 packed bed smoldering forward propagation characteristics study decreases Simulations show effects frequency factors evolutions species inlet |
| 收稿时间： | 2006-09-05 |
| 修稿时间： | 2006年9月5日 |
Numerical study on the propagation characteristics of forward smoldering in a cellulosic packed bed |
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| Bao-shan Jia,Mao-zhao Xie,Hong Liu.Numerical study on the propagation characteristics of forward smoldering in a cellulosic packed bed[J].Journal of Shanghai University(English Edition),2008,12(2):171-179. |
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| Authors: | Bao-shan Jia Mao-zhao Xie Hong Liu |
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| Institution: | 1. School of Energy and Power, Daiian University of Technology, Dalian 116024, P. R. China;College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, P. R. China
2. School of Energy and Power, Daiian University of Technology, Dalian 116024, P. R. China |
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| Abstract: | Based on a three-step kinetic mechanism, a one-dimensional, time dependent, numerical model is presented forthe smoldering propagation in a horizontally packed bed of cellulosic material. The kinetic processes include pyrolysis andoxidation degradation of fuel and oxidation of char. Heat transfer between solid and gas is taken into account, and the diffusioncoefficient varies with the temperature. Radiative heat transfer is included by using the diffusion approximation. The effectsof airflow velocity and oxygen concentration are simulated on the smoldering velocity and the averaged maximum temperatureof smoldering fuel. The results indicate that the spread rate varies linearly with increasing airflow velocity, and the inlet airvelocity has little effect on the maximum temperature. The evolutions of gas species and solid compositions are predicted.The effects of frequency factors (A1, A2 and A3) are analyzed. Simulations show that the smoldering spread rate increaseswith increasing A2 (fuel oxidation), but decreases with A1 (fuel pyrolysis) and A3 (char oxidation). |
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| Keywords: | forward smoldering inlet air velocity smoldering velocity pre-exponential factor |
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