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On-line Access: 2022-05-23

Received: 2020-12-25

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Dong-peng JIA

https://orcid.org/0000-0002-1331-8822

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Journal of Zhejiang University SCIENCE A 2022 Vol.23 No.5 P.405-414

http://doi.org/10.1631/jzus.A2000620


Effect of the micro vortex generator on the characteristics of vaporized RP-3 kerosene combustion in supersonic flows


Author(s):  Dong-peng JIA, Kai YANG, Yu PAN, Xi-peng LI, Ning WANG

Affiliation(s):  Science and Technology on Scramjet Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Corresponding email(s):   lixipeng_226@yeah.net

Key Words:  Vaporized RP-3 kerosene, Micro vortex generator (MVG), Ignition process, Cavity-stabilized flame


Dong-peng JIA, Kai YANG, Yu PAN, Xi-peng LI, Ning WANG. Effect of the micro vortex generator on the characteristics of vaporized RP-3 kerosene combustion in supersonic flows[J]. Journal of Zhejiang University Science A, 2022, 23(5): 405-414.

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author="Dong-peng JIA, Kai YANG, Yu PAN, Xi-peng LI, Ning WANG",
journal="Journal of Zhejiang University Science A",
volume="23",
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pages="405-414",
year="2022",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2000620"
}

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%T Effect of the micro vortex generator on the characteristics of vaporized RP-3 kerosene combustion in supersonic flows
%A Dong-peng JIA
%A Kai YANG
%A Yu PAN
%A Xi-peng LI
%A Ning WANG
%J Journal of Zhejiang University SCIENCE A
%V 23
%N 5
%P 405-414
%@ 1673-565X
%D 2022
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2000620

TY - JOUR
T1 - Effect of the micro vortex generator on the characteristics of vaporized RP-3 kerosene combustion in supersonic flows
A1 - Dong-peng JIA
A1 - Kai YANG
A1 - Yu PAN
A1 - Xi-peng LI
A1 - Ning WANG
J0 - Journal of Zhejiang University Science A
VL - 23
IS - 5
SP - 405
EP - 414
%@ 1673-565X
Y1 - 2022
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2000620


Abstract: 
To investigate the characteristics of vaporized RP-3 kerosene combustion in a scramjet combustor enhanced by the micro vortex generator (MVG), a series of experiments are carried out based on the advanced combustion diagnosis technique. The high-enthalpy incoming flow is accelerated to supersonic through a Mach 2.52 nozzle, the total pressure and temperature of which are 1.6 MPa and 1486 K, respectively. The effect of MVG on the ignition process, flame distribution, and combustor pressure along the bottom wall is well revealed, and the effects of the position and number of MVGs on stable combustion performance are analyzed. The results indicate that the development processes of the initial flame kernel with and without an MVG during ignition process show a similar behavior. The installation of an MVG can lift the shear layer, promote the penetration of flame deeper into the mainstream, and expand the area of the reactive region. Reducing the distance between the MVG and the injection position and increasing the number of MVGs are regarded as effective ways of improving the mixing degree of fuel and air with a resultant intensification of chemical reactions and flame luminescence. The effect of mixing and subsequent combustion is enhanced by shortening the distance between the MVG and the injection position. As the layout schemes of the MVG vary, the pressure distribution between the injection position and the leading edge of the cavity changes considerably, while that in the cavity remains almost constant. Increasing the number of MVGs is also beneficial for improving the premixed degree of fuel and incoming flow and results in more violent chemical reactions downstream of the cavity.

微型涡流发生器对超声速气流中气化RP-3煤油燃烧特性的影响

作者:贾东鹏,杨恺,潘余,李西鹏,王宁
机构:国防科技大学,空天科学学院,高超声速冲压发动机技术重点实验室,中国长沙,410073
目的:研究微型涡流发生器(MVG)对超燃冲压发动机燃烧室中气化RP-3煤油燃烧的增强作用。
创新点:1.实验研究了微型涡流发生器对超声速气流中气化煤油燃烧的增强作用;2.分析了微型涡流发生器布置位置和数量的影响。
方法:1.在超燃冲压发动机直连式测试平台上进行气化RP-3煤油燃烧的实验研究;2.比较喷注位置下游有无微型涡流发生器时点火过程和凹腔稳焰的区别,验证微型涡流发生器对燃烧的促进作用;3.探讨微型涡流发生器位置和数量的影响。
结论:1.有无涡流发生器对点火过程影响较小,但微型涡流发生器能够在火焰稳定后促进燃烧;微型涡流发生器可以提升剪切层,使火焰区域更深入主流。2.缩短微型涡流发生器与喷注位置之间的距离有利于促进燃料与空气的预混程度,能够促进燃料的混合和随后的燃烧效果;本文中缩短两者之间的距离能够将光强提升15.6%;微型涡流发生器的位置主要影响喷注位置和凹腔之间的室压,而对凹腔附近室压影响很小。3.增加微型涡流发生器的数量对燃烧前燃料与空气的预混效果有促进作用,使下游的化学反应更加剧烈;然而,微型涡流发生器的位置对燃烧性能的影响可能更大。

关键词:气化RP-3煤油;微型涡流发生器;点火过程;凹腔稳焰

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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