空气污染组分H_2O和CO_2对乙烯点火特性的影响
Effects of H_2O and CO_2 in vitiated Air on Ignition Characteristic of Ethylene
查看参考文献21篇
|
文摘
|
超燃研究地面实验中通过燃烧加热方式获得的高焓气体中通常含有H_2O和CO_2等污染组分,污染组分可能造成地面实验与天空飞行中燃料的点火特性出现差异。为了正确评估这两种污染组分对碳氢燃料点火特性的影响,在预加热激波管上研究了H_2O和CO_2对乙烯点火特性的影响效应。以压力0.2MPa,化学当量比1和0.5乙烯在纯净气体中点火特性为基础,分别进行了单独加入7.5%,15%和25%的H_2O,单独加入10%的CO_2,以及同时加入25%H_2O+10%CO_2条件下,污染组分对乙烯点火特性影响的对比实验研究。结果表明:在贫油条件下(Φ=0.5),单独污染组分H_2O和CO_2对乙烯的点火基本没有影响;在化学当量比条件下(Φ=1)时,H_2O和CO_2分别对乙烯的点火具有一定的阻滞作用;当H_2O和CO_2同时存在时,污染组分在较大温度范围内表现出对乙烯点火的阻滞作用。从燃烧反应机理和热物理性质的角度对实验结果进行了初步分析。 |
|
其他语种文摘
|
In the ground tests of hypersonic scramjet, the high-enthalpy airstream produced by burning hydrocarbon fuels often contains contaminants H_2O and CO_2. The contaminants may cause the ignition characteristics of the fuel to become discrepant between ground tests and real flights. In order to properly assess the effects of the contaminants on ignition characteristics of hydrocarbon fuels, the effects of H_2O and CO_2 on ignition charateristics of ethylene were investigated in a preheated shock tube. Based on the ignition delay time of ethylene in clean gas, comparative experiments with clean and vitiated gases were conducted. At pressure of 0.2 MPa, equivalence ratios of 1 and 0.5, ignition delay time of ethylene were measured for four cases: (1) clean gas, (2) gas vitiated with 7.5%, 15% and 25% H_2O by mole, (3) gas vitiated with 10% CO_2 by mole, and (4) gas vitiated with 25% H_2O and 10% CO_2 by mole. The experimental results show that water vapor and carbon dioxide have almost no effects at equivalence ratio of 0.5, but an inhibiting effect appears at equivalence ratio of 1. An obviously inhibiting effect appears over a wide temperature range when water vapor and carbon dioxide exist together. The results were also discussed preliminarily by considering both the combustion reaction mechanism and the thermophysics properties of the test mixtures. |
|
来源
|
推进技术
,2014,35(2):220-226 【核心库】
|
|
关键词
|
污染效应
;
点火延时
;
乙烯
;
激波管
|
|
地址
|
1.
重庆大学化学化工学院, 高温气体动力学国家重点实验室, 重庆, 400044
2.
中国科学院力学研究所, 高温气体动力学国家重点实验室, 北京, 100190
3.
重庆大学化学化工学院, 重庆, 400044
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1001-4055 |
|
学科
|
航空 |
|
基金
|
国家自然科学基金项目
|
|
文献收藏号
|
CSCD:5056214
|
参考文献 共
21
共2页
|
|
1.
Pellett G L.
Review of Air Vitiation Effects on Scramjet Ignition and Flam Holding Combustion Processes. AIAA2002-3880
|
被引
1
次
|
|
|
|
|
2.
Wang H. A Detailed Kinetic Modeling Study of Aromatics Formation in Laminar Premixed Acetylene and Ethylene Flames.
Combustion and Flame,1997,110(1/2):173-221
|
被引
82
次
|
|
|
|
|
3.
刘伟雄. 空气污染组分H_2O和CO_2对乙烯燃烧性能的影响.
物理化学学报,2009,25(8):1618-1622
|
被引
9
次
|
|
|
|
|
4.
Jachimowski C J.
Effect of Carbon Dioxide and Water Vapor on the Induction Period of the Hydrogen-Oxygen Reaction.NASA TND-4685,1968
|
被引
1
次
|
|
|
|
|
5.
Hitch B D. Reduced H_2-O_2 Mechanisms for Use in Reacting Flow Simulation.
AIAA Journal,1988,88:732-743
|
被引
1
次
|
|
|
|
|
6.
Goyne C P. Test Gas Vitiation Effects in a Dual-Mode Scramjet Combustor.
Journal of Propulsion and Power,2007,23(3):559-565
|
被引
19
次
|
|
|
|
|
7.
Gurentsov E V. Ignition of Multicomponent Hydrocarbon/Air Mixtures Behind Shock Waves.
High Temperature,2002,40(3):379-386
|
被引
4
次
|
|
|
|
|
8.
Le C T. Experimental and Detailed Kinetic Modeling of the Oxidation of Methane and Methane/Syngas Mixtures and Effect of Carbon Dioxide Addition.
Combustion Science and Technology,2008,180(10/11):2046-2091
|
被引
4
次
|
|
|
|
|
9.
Liu F. The Chemical Effect of CO_2 Replacement of N_2 in Air on the Burning Velocity of CH_4 and H_2 Premixed Flames.
Combustion and Flame,2003,133(4):495-497
|
被引
14
次
|
|
|
|
|
10.
Renard C. Effect of CO_2 or H_2O Addition on Hydrocarbon Intermediates in Rich C_2H_4/O_2/Ar Flames.
Process European Combustion Meeting,2003
|
被引
1
次
|
|
|
|
|
11.
Liu F. The Chemical Effects of Carbon Dioxide as an Additive in an Ethylene Diffusion Flame: Implications for Soot and NO x Formation.
Combustion and Flame,2001,125(1/2):778-787
|
被引
12
次
|
|
|
|
|
12.
Le C T. Oxidation of Ethylene and Propane in the Presence of CO_2 and H_2O: Experimental and Detailed Kinetic Modeling Study.
Combustion Science and Technology,2010,182(4/6):333-349
|
被引
1
次
|
|
|
|
|
13.
Chinitz W.
Test Facility Contaminant and Atmospheric Ozone Effects on Hydrocarbon Flames and Nozzle Expansions. AIAA96-2917
|
被引
1
次
|
|
|
|
|
14.
Chinitz W.
Test Facility Chemistry Effects on Hydrogen Flames and Detonations. AIAA95-2467
|
被引
1
次
|
|
|
|
|
15.
刘伟雄. 空气污染组分H_2O和CO_2对乙烯燃烧性能的影响（II）-机理研究和动力学模拟.
物理化学学报,2010,26(2):270-276
|
被引
1
次
|
|
|
|
|
16.
郭帅帆. 燃烧加热污染空气对超燃冲压发动机性能影响研究.
推进技术,2013,34(4):493-498
|
被引
9
次
|
|
|
|
|
17.
李建平. H_2O/CO_2污染对煤油燃料超声速燃烧影响数值研究.
推进技术,2013,34(4):562-571
|
被引
3
次
|
|
|
|
|
18.
Liang J H. Shock Tube Study of Kerosene Ignition Delay at High Pressures.
Science China Physics, Mechanics & Astronomy,2012,55(6):947-954
|
被引
9
次
|
|
|
|
|
19.
Tang W T. Chemical Kinetic Simulations Behind Reflected Shock Waves.
International Journal of Chemical Kinetics,2006,38(2):75-97
|
被引
3
次
|
|
|
|
|
20.
Shen H P. A Shock Tube Study of Iso-Octane Ignition at Elevated Pressures: The Influence of Diluent Gases.
Combustion and Flame,2008,155(4):739-755
|
被引
5
次
|
|
|
|
|
了解气象卫星更多信息，请访问