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论文:2012,Vol:30,Issue(2):256-261 |
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引用本文： |
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张志强, 宋文艳, 罗飞腾. H2O/CO2组分对氢和乙烯超声速燃烧室性能影响数值模拟[J]. 西北工业大学 |
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Zhang Zhiqiang, Song Wenyan, Luo Feiteng. Numerical Investigation of Effects of H2O/CO2 Vitiation on Performance of Hydrogen and Ethylene Supersonic Combustors[J]. Northwestern polytechnical university |
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| H2O/CO2组分对氢和乙烯超声速燃烧室性能影响数值模拟 |
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| 张志强, 宋文艳, 罗飞腾 |
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| 西北工业大学 动力与能源学院,陕西 西安 710072 |
| 摘要: |
| 文章采用数值计算方法,评估了H2O与CO2两种污染组分对氢、乙烯超声速燃烧室性能的影响。针对纯净空气和含H2O/CO2污染空气,在来流总温、总压、马赫数、氧气摩尔含量、燃料当量油气比相当的条件下对氢、乙烯超声速燃烧室分别进行了三维、二维燃烧流场数值模拟,其中氢气当量比为0.42,乙烯当量比为0.57。计算中考虑的H2O组分摩尔含量包括7.5%和17.5%,CO2组分摩尔含量为7.5%。最后,将数值计算结果与相应实验测量值进行了对比分析。研究结果表明:数值计算结果与实验测量值比较接近,反映的H2O、CO2污染组分影响趋势一致的,计算结果可以有效分辨出污染组分对燃烧室性能的影响;H2O、CO2污染组分的存在降低了燃烧总温升、燃烧效率,进而降低了燃烧室壁面压力,总体上造成燃烧室性能的下降。 |
| 关键词:
超声速燃烧
燃烧室
CFD
污染效应
效率
乙烯燃料
氢燃料
数值模拟
污染
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| Numerical Investigation of Effects of H2O/CO2 Vitiation on Performance of Hydrogen and Ethylene Supersonic Combustors |
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| Zhang Zhiqiang, Song Wenyan, Luo Feiteng |
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| Department of Aero-Engines,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| Section 1 of the full paper explains the method of numerical investigation mentioned in the title. Its coreconsists of: (1) we perform the 3D simulation of the combustion flow field of hydrogen-fueled supersonic combustorand the 2D simulation of ethylene-fueled supersonic combustor under the conditions of clean airstream and H2O/CO2 vitiated airstream in terms of total temperature, total pressure, Mach number, 21% oxygen content and equiva-lent ratio; the equivalent ratio of hydrogen is 0. 42 and that of ethylene is 0. 57; the H2O content for contaminatedairstream is 7. 5% and 17. 5% by mole, and the CO2 content is 7. 5% by mole. Section 2 compares the simulationresults with the results of experiments performed by us, as shown in Figs. 3, 4 and 10; the investigation resultsshow that:(1) the simulated wall-pressure agrees well with the experimental wall-pressure; (2) the simulation re-sults effectively identify the effects of H2O/CO2 vitiation on the performance of supersonic combustor; (3) the pres-ence of H2O and CO2 contaminants lowers down the total temperature rise and combustion efficiency and raises theMach number in the flow field of the combustor, thereby reducing the wall pressure of the combustor in comparisonwith clean airstream; (4) the overall performance of the combustor gets poorer due to H2O/CO2 contamination. |
| Key words:
calculations
combustion
combustor;contamination
effects
efficiency
ethylene
experiments
fu-els
hydrogen
numerical methods
simulation
supersonic combustion
vitiation
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| 收稿日期: 2011-06-10
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 张志强(1984-),西北工业大学硕士研究生,主要从事航空宇航推进理论与工程的研究。
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参考文献: |
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[1] Srinivasan S, Erickson W D. Influence of Test-Gas Vitiation on Mixing and Combustion at Mach 7 Flight Conditions. AIAA-1994-2816
[2] Srinivasan S, Erickson W D. Interpretation of Vitiation Effects on Testing at Mach 7 Flight Conditions. AIAA-1995-2719
[3] Mattick S J, Frankel S H. Numerical Modeling of Supersonic Combustion: Validation and Vitiation Studies Using FLUENT．AIAA-2005-4287
[4] Shivakumar Srinivasan, Wayne D Erickson. Influence of Test-Gas Vitiation on Mixing and Combustion at Mach 7 Flight Condic-tions. AIAA-1994-2816
[5] Krauss R H, Gauba G. Experiment and Numerical Investigation of Steam-Vitiated Supersonic Hydrogen Combustion. AIAA-1996-0856
[6] Evans J S, Schexnayder C J. Influence of Chemical Kinetics and Unmixedness on Burning in Supersomc Bydrogen Flames．AIAA Journal, 1980, 18(2):
[7] Mawid M A, et al. Kinetic Modeling of Ethylene Oxidation in High Speed Reacting Flows. AIAA-1997-3269 |
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