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浙江大学学报(工学版)
能源工程     
声场频率与振幅对火焰NOx生成特性的影响
沈忠良,邓凯,王明晓,钟英杰
浙江工业大学 能源与动力工程研究所 脉动技术工程研究中心,浙江 杭州 31001
Effects of acoustic frequency and amplitude on NOx of partially premixed flame
SHEN Zhong liang, DENG Kai, WANG Ming xiao, ZHONG Ying jie
Engineering Research Center of Pluse Technology, Institute of Energy and Power Engineering,
Zhejiang University of Technology, Hangzhou 310014, China
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摘要:

针对频率为0~180 Hz和压力振幅为(0~1000 )Pa的声场作用对甲烷/空气部分预混火焰NOx生成特性的影响,通过高速摄像、火焰直拍、热电偶测温等技术,分析火焰EINOx、火焰长度与声场振幅、频率之间的关系.结果显示,在频率为0~180 Hz和压力振幅为(1~1000) Pa内,当频率f一定时,随压力振幅的增加,火焰与周围气体的掺混进一步增强,火焰长度减小,高温区域停留时间减小,致使EINOx生成降低,且EINOx与振幅之间存在线性关系,斜率为-0.009~-0.003.在振幅一定时,随频率的增加,声对火焰的影响逐渐减弱,火焰长度逐渐增加,火焰区域的平均温度降低,导致EINOx增加,且EINOx与频率之间存在线性关系,斜率为0.01~0.03.

Abstract:

The effects of acoustic frequency(0~180 Hz) and amplitude(0~1000 Pa) on the NOx of methane/air partially premixed flame wereinvestigated experimentally. High speed camera, flame image and thermocouple temperature measurements were used to analyzethe relationship between acoustic amplitudeand frequency with EINOx. The results show that whenacoustic amplitude increases, EINOx decreases. Thereason is that under the larger acoustic amplitude, the strengthen of mixing of flame and surrounding gas lead to the decrease of flame length and global residence time, which is the major factorfor the lower EINOx.There is a linear relationship between EINOx and amplitudethatthe slope of the linear function is range from -0.009 to -0.003. The results also show thatwhen acoustic frequency increases,EINOx increases. Becausethat under the higher frequency, the effect of acoustic field on flame decreases, then lead tothe longer flame length, which is the reason forhigher EINOx. There is a linear relationship between EINOx and frequencythatthe slope of the linear function is range from 0.01 to 0.03.

出版日期: 2015-11-01
:  TK 16  
基金资助:

国家自然科学基金资助项目(51106139)

通讯作者: 邓凯,女,讲师.ORCID:0000 0003 0233 3442.     E-mail: dkai@zjut.edu.cn
作者简介: 沈忠良(1987-),男,博士生,从事低污染燃烧技术、燃烧模型等方面研究.ORCID:0000 0002 5486 7991. E-mail:mdzx@zjut.edu.cn
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引用本文:

沈忠良,邓凯,王明晓,钟英杰. 声场频率与振幅对火焰NOx生成特性的影响[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008 973X.2015.11.0234.

SHEN Zhong liang, DENG Kai, WANG Ming xiao, ZHONG Ying jie. Effects of acoustic frequency and amplitude on NOx of partially premixed flame. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008 973X.2015.11.0234.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008 973X.2015.11.0234        http://www.zjujournals.com/eng/CN/Y2015/V49/I11/2198

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