Volume 37, Number 2, April 2019
|Page(s)||369 - 377|
|Published online||05 August 2019|
The Influence of Dielectric Barrier Discharge Plasma on the Characteristics of Aero-Engine Combustion Chamber
Aeronautics Engineering College, Air Force Engineering University, Xi’an 710038, China
A test platform was developed to investigate the performance of aero-engine combustor by the dielectric barrier discharge (DBD) plasma assisted combustion (PAC) in the simulated maximum condition. Conventional combustion experiments and plasma-assisted combustion conditions were conducted to study the effect of PAC on the performances including average outlet temperature, combustion efficiency and pattern factor under four different excessive air coefficients five different voltages. The comparative experiment shows that the combustion efficiency is improved after PAC compared with the normal conditions, the combustion efficiency of PAC increases 2.31% in the fuel-rich condition when Up-p is 40 kV. The uniformity of the outlet temperature field is also improved after PAC, the decrease of the pattern factor is more than 5% in the fuel-rich condition. These results offer certain reference value for the future application of PAC in aero-engine combustor and improving its performance.
建立了航空发动机燃烧室等离子体助燃实验平台，开展了航空发动机燃烧室DBD（dielectric barrier discharge）等离子体助燃在模拟航空发动机燃烧室最大状态条件下的性能实验。通过正常燃烧和等离子体助燃的对比实验和分析，研究了等离子体助燃对4种余气系数和5种电压条件下的平均出口温度、燃烧效率、出口不均匀系数的影响。实验结果表明，与正常工况相比，等离子体助燃后的燃烧效率有所提高，当电压为40 kV时，等离子体助燃时的燃烧效率在富燃料条件下提高了2.31%。实施助燃后出口温度场均匀性也得到改善，但在富油条件下效果最好，出口温度分布系数的减小量超过5%。这些结果对未来将等离子体助燃技术应用于航空发动机燃烧室并提高其性能具有一定的参考价值。
Key words: aero-engine combustion chamber / plasma-assisted combustion / dielectric barrier discharge / average outlet temperature / combustion efficiency / pattern factor
关键字 : 航空发动机燃烧室 / 等离子体助燃 / 介质阻挡放电 / 平均出口温度 / 燃烧效率 / 出口不均匀系数
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
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