PDF下载 分享
[1]黄景怀,王 威.基于详细反应机理的直管中正庚烷燃烧特性研究[J].火箭推进,2018,44(01):53-58.
　HUANG Jinghuai,WANG Wei.Study based on detailed reaction mechanism for n-Heptane's combustion characteristics inside straight tube[J].Journal of Rocket Propulsion,2018,44(01):53-58.
点击复制

基于详细反应机理的直管中正庚烷燃烧特性研究

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V] 卷: 44 期数: 2018年01期 页码: 53-58 栏目: 研究与设计 出版日期: 2018-02-28
Title:
Study based on detailed reaction mechanism for n-Heptane's combustion characteristics inside straight tube
文章编号:
1672-9374(2017)06-0053-06
作者:
黄景怀; 王 威
北京航天动力研究所,北京 100076
Author(s):
HUANG Jinghuai; WANG Wei
Beijing Aerospace Propulsion Insititute,Beijing 100076,China
关键词:
正庚烷;  详细反应机理;  火焰结构;  入口参数;  对流换热系数
Keywords:
n-Heptane;  detailed reaction mechanism;  flame structure;  inlet parameter;  convective heat transfer coefficient
分类号:
V433.9-34
文献标志码:
A
摘要:
利用详细化学反应机理,计算得到了正庚烷火焰附近一维的火焰结构; 通过改变直管表面与空气之间的对流换热系数,得到了不同散热条件下燃烧器的工作特性,包括温度分布、火焰结构、主要产物的分布等。结果表明:正庚烷在进入预热区之前便已消耗; 在反应过程中,固定当量比时,直管内的火焰温度保持不变,火焰位置与燃料流量(mf)之间呈现线性关系,火焰下游温度变化斜率与mf也呈线性关系; 直管外表面对流换热系数的增加使得气体温度逐渐降低最终趋向熄灭。
Abstract:
The 1-D flame structure near n-Heptane flame was calculated according to the detailed chemical reaction mechanism and then it was obtained. The temperature distribution,flame structure and the main products distribution under various heat emission conditions were got by changing the convective heat transfer coefficient between straight tube surface and air. The calculating result shows that the n-heptane is almost completely consumed before it goes into the preheat zone; during the reaction process,the flame temperature in the straight tube remains unchanged when the equivalence ratio is stable; there was a linear relationship between the flame location and the fuel's mass flow rate(mf),and also between the temperature slope in the downstream of flame and mf; the increase of convective heat transfer coefficient on the outside surface of the straight tube makes the gas temperature in the tube gradually decreased and finally extinguished.

参考文献/References:

[1] 薛诚尤,聂万胜,何博.基于基元反应的总包机理建模及算法优化[J].火箭推进,2015,41(1):36-42.
XUE Chengyou,NIE Wansheng,HE Bo.Modeling and algorithm optimization of global reaction mechanism based on elementary reaction[J].Journal of rocket propulsion,2015,41(1):36-42.
[2] CURRAN H J,GAFFURI P,PITZ W J, et al.n-heptane,detailed mechanism,version 2 [EB/OL].[2017-11-27].https://combustion.llnl.gov.
[3] KATTA V R,AGGARWAL S K,ROQUEMORE W M.Evaluation of chemical-kinetics models for n-heptane combustion using a multidimensional CFD code[J].Fuel,2012,93:339-350.
[4] WESTBROOK C K.Chemical kinetics of hydrocarbon ignition in practical combustion systems[J].Proceedings of combustion institute,2000,28(2):1563-1577.
[5] VOSS S,MENDES M A A,PEREIRA J M C.Investigation on the thermal flame thickness for lean premixed combustion of low calorific H2/CO mixtures within porous inert media[J].Proceedings of combustion institute,2013,34(2):3335-3342.
[6] SOIKA A,DINKELACKEN F,EIPETRZ A.Measurement of the resolved flame structure of turbulent premixed flames with constant Reynolds number and varied stoichiometry[J].Symposium(international)on combustion,1998,27(1):785-792.
[7] O'YOUNG F,BILGER R W.Scalar gradient and related quantities in turbulent premixed flames[J].Combust flame,1997,109(4):682-700.

备注/Memo

收稿日期:2017-08-02; 修回日期:2017-09-20 作者简介: 黄景怀(1989—),男,博士,研究领域为火箭发动机、燃烧化学反应等

更新日期/Last Update: 1900-01-01