随机堆积床内甲烷/空气预混燃烧过程的数值模拟

doi:10.12068/j.issn.1005-3026.2019.07.010

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (7): 962-967.DOI: 10.12068/j.issn.1005-3026.2019.07.010

随机堆积床内甲烷/空气预混燃烧过程的数值模拟

姜霖松¹，刘宏升¹，吴丹²，解茂昭¹

(1. 大连理工大学海洋能源利用与节能教育部重点实验室，辽宁大连116024; 2. 营口理工学院机械与动力工程系，辽宁营口115014)

收稿日期:2018-03-04 修回日期:2018-03-04 出版日期:2019-07-15 发布日期:2019-07-16
通讯作者: 姜霖松
作者简介:姜霖松(1991-)，女，辽宁盘锦人，大连理工大学博士研究生；解茂昭(1944-)，男，辽宁大连人，大连理工大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51576029，51606176，51476105).

Numerical Simulation of Methane-Air Premixed Combustion Process in a Randomly Packed Bed

JIANG Lin-song¹， LIU Hong-sheng¹， WU Dan²， XIE Mao-zhao¹

1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education， Dalian University of Technology， Dalian 116024， China; 2. Department of Mechanical and Power Engineering， Yingkou Institute of Technology， Yingkou 115014， China.

Received:2018-03-04 Revised:2018-03-04 Online:2019-07-15 Published:2019-07-16
Contact: LIU Hong-sheng
About author:-
Supported by:
-

摘要/Abstract

摘要： 通过离散元软件LIGGGHTS重现球体的重力堆积过程，建立三维随机堆积床几何模型.利用大涡方法结合双温度模型以及EBU-Arrhenius燃烧模型，模拟了甲烷/空气预混气体在堆积床内预混合燃烧过程.通过将模拟结果与实验数据对比验证了模型的有效性，在此基础上对随机堆积床内部的火焰分布结构、火焰面形状及温度分布规律等进行了分析.模拟结果表明:在燃烧后期，堆积床内的小球温度要高于同一高度上气体的温度，这体现了多孔介质良好的蓄热能力;壁面与轴线间的火焰面高度差远远小于无多孔介质的管内燃烧情况，表明随机堆积床可以通过分割火焰来提高燃烧的均匀性和稳定性.

关键词: 堆积床, 随机结构, 预混燃烧, 蓄热能力, 火焰面

Abstract: Three dimensional random geometric structure of pellets packed bed was modeled using the discrete element software LIGGGHTS. Large eddy simulation method， two-temperature model and EBU-Arrhenius combustion model were employed to simulate the premixed combustion process of methane-air in the randomly packed bed. The calculated results are compared with experiment data to verify effectiveness of the model. The structure and the shape of the flame and the temperature distribution in the packed bed were analyzed. The simulation results show that the temperature of solid is higher than that of gas on the same height of the packed bed during the late stage of combustion， which reflects a good thermal storage capacity of the porous medium. The height difference of the fame surface between the tube wall and the center in the packed bed is much smaller than that in tube without porous media， which suggests that the flame is divided by the packed bed and then the uniformity and stability of the combustion within a porous medium are improved.

Key words: packed bed, random structure, premixed combustion, thermal storage capacity, flame surface

中图分类号:

TK16

姜霖松，刘宏升，吴丹，解茂昭. 随机堆积床内甲烷/空气预混燃烧过程的数值模拟[J]. 东北大学学报:自然科学版, 2019, 40(7): 962-967.

JIANG Lin-song， LIU Hong-sheng， WU Dan， XIE Mao-zhao. Numerical Simulation of Methane-Air Premixed Combustion Process in a Randomly Packed Bed[J]. Journal of Northeastern University Natural Science, 2019, 40(7): 962-967.

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随机堆积床内甲烷/空气预混燃烧过程的数值模拟

Numerical Simulation of Methane-Air Premixed Combustion Process in a Randomly Packed Bed

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