[1]孙从煌①,曲艳东②,王帅①,等.变截面管道结构对H2/Air预混气体燃爆特性的影响研究[J].爆破器材,2018,47(03):19-26.[doi:10.3969/j.issn.1001-8352.2018.03.004]
　SUN Conghuang,QU Yandong,WANG Shuai,et al.Influence of Variable Cross-section Pipe Structure on Deflagration Characteristics of H2/Air Premixed Gas[J].EXPLOSIVE MATERIALS,2018,47(03):19-26.[doi:10.3969/j.issn.1001-8352.2018.03.004]
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变截面管道结构对H2/Air预混气体燃爆特性的影响研究()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
47
期数:
2018年03
页码:
19-26
栏目:
基础理论
出版日期:
2018-05-02

文章信息/Info

Title:
Influence of Variable Cross-section Pipe Structure on Deflagration Characteristics of H2/Air Premixed Gas
文章编号:
5203
作者:
孙从煌①；曲艳东②；王帅①；曹验兵①
①中国十九冶集团有限公司工业建设分公司（四川成都，610000）
②辽宁工业大学土木建筑工程学院（辽宁锦州，121001）
Author(s):
SUN Conghuang①;  QU Yandong②;  WANG Shuai①;  CAO Yanbing①
①Industrial Construction branch, China 19th Metallurgical Corporation (Sichuan Chengdu,610000) 
②College of Civil Engineering and Architecture, Liaoning University of Technology (Liaoning Jinzhou,121001)
关键词:
变截面管道; 预混火焰; 燃爆特性; 湍流燃烧; 火焰前锋
Keywords:
variable cross-section pipe;  premixed flame;  deflagration characteristics;  turbulent combustion;  flame front
分类号:
X932;TE832
DOI:
10.3969/j.issn.1001-8352.2018.03.004
文献标志码:
A
摘要:
实际工业中,管道截面突变可改变预混燃气火焰的燃烧模式和燃爆特性，影响燃气输送的安全性。为此，利用Fluent软件，数值模拟研究了4种变截面管道结构（突变扩张型管道、突变收缩型管道、渐变扩张型管道和连续突变扩张型管道）对H2/Air预混气体燃爆过程火焰动态变化的影响，并分析了管内温度场、压力场的分布情况、气体流速和涡量等燃爆特征参数以及焓、熵值等热力学参数的变化规律。研究结果表明：扩张型管截面的突扩诱导作用和收缩型管截面的收缩阻挡作用改变了管内预混气体燃烧火焰传播的动态结构以及火焰前锋的稀松波和预混气流方向，使火焰出现了“杯口”型和“长颈花瓶“型前锋面；突变收缩型管截面的阻挡、反射和抑制作用加强了湍流强度和涡流运动强度，管内最高温度、峰值压力和平均流速等燃爆特征参数也相对较高，而涡团向上、下管壁的运动抑制了火焰尖端的反应强度和传播速度；渐变扩张型管道能降低突扩诱导作用的影响；而连续突变扩张型管内发生在层流向湍流火焰转变阶段的首次截面突扩产生的诱导作用对其燃爆特性的影响更为显著。
Abstract:
In industrial applications, the mutation of pipe section can change the combustion model and deflagration characteristic of premixed gas, which would affect its transportation safety. Influence of four kinds variable cross-section pipeline structures (mutational expansive pipe, mutational concretive pipe, gradually expansive pipe and continuous mutation expansive pipe) on the flame dynamic change in the combustion process of H2/Air premixed gas was numerically simulated by Software Fluent. Distribution of temperature field and stress field, and change law of combustion characteristic parameters of premixed gas such as flow velocity and vorticity were also analyzed. Results show that induction functions of mutational expansive and blocking functions of mutational concretive in variable cross-section pipelines change dynamic structure of premixed flame propagation and the heading direction of poor ware in front of premixed flame and premixed airflow, generating “cup” type and “long neck vase” type flame fronts. Blocking, reflection and inhibiting effects of mutational concretive pipe strengthened the turbulence intensity and eddy current intensity, and brought deflagration parameters, such as the highest temperature, peak pressure and average flow velocity, to higher level. However, the motion of vortex to upper or lower wall inhibits the reaction strength and propagating speed of the flame tip. Gradually expansive pipe can reduce the influence of induction functions of mutational expansive. Influence of induction functions caused by the first mutational cross-section, in the process of lamina to turbulence, is more significant in the continuous mutation expansive pipe.

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备注/Memo

备注/Memo:
收稿日期：2017-08-13
基金项目：国家自然科学基金项目（11302094）；辽宁省高等学校优秀人才项目（LJQ2014063）；辽宁省科技厅预研项目（SY201603）； 辽宁工业大学教师科研启动基金（X201403）
作者简介：孙从煌（1990－），男，硕士，主要从事爆炸力学研究。E-mail：sunconghuang@163.com
通信作者：曲艳东（1978－），男，博士，教授，主要从事爆炸力学、爆炸加工与爆炸安全研究。E-mail：plxfeng2009@sohu.com
更新日期/Last Update: 2018-04-28