乙醇在微尺度单电极燃烧器内的雾化与燃烧

doi:10.11949/j.issn.0438-1157.20150530

化工学报 ›› 2015, Vol. 66 ›› Issue (11): 4597-4602.DOI: 10.11949/j.issn.0438-1157.20150530

乙醇在微尺度单电极燃烧器内的雾化与燃烧

甘云华, 佟洋, 罗智斌

华南理工大学电力学院, 广东广州 510640;
广东省能源高效清洁利用重点实验室, 广东广州 510640

收稿日期:2015-04-27 修回日期:2015-05-25 出版日期:2015-11-05 发布日期:2015-11-05
通讯作者: 甘云华
基金资助:
国家自然科学基金项目(51376066);中央高校基本科研业务费资助项目(D2154080)。

Electro-spraying and combustion of alcohol in micro-combustorwith single electrode

GAN Yunhua, TONG Yang, LUO Zhibin

School of Electric Power, South China University of Technology, Guangzhou 510640, Guangdong, China;
Key Laboratory of Efficient and Clean Energy Utilization of Guangdong Province, Guangzhou 510640, Guangdong, China

Received:2015-04-27 Revised:2015-05-25 Online:2015-11-05 Published:2015-11-05
Supported by:
supported by the National Natural Science Foundation of China (51376066) and the Central Universities Fundamental Research Progject in SCUT (D2154080).

摘要/Abstract

摘要：

采用荷电喷雾燃烧技术是促进微尺度下液体燃料稳定燃烧的重要方法。使用乙醇为燃料,在新型结构的喷嘴内径为0.8 mm微尺度单电极燃烧器内,进行了荷电雾化与燃烧特性的实验研究。结果表明:荷电雾化会随喷嘴电压升高而出现4种模式,对应的荷质比在脉动模式下最低,到达锥-射流模式后出现跃升,在锥-射流模式下最为稳定。荷电雾化后的乙醇在燃烧器网格处稳定燃烧,火焰温度随着当量比增大先上升后下降。火焰温度在当量比=1.0时达到最高值,且随电压增大而上升。锥-射流模式下,当量比=1.0时,燃烧效率可达89%,燃料转换效率可达90%。稳定的雾化模式以及合适的当量比,对燃烧效果具有较大的改善作用。

关键词: 微尺度, 醇, 燃料, 荷电雾化, 燃烧效率, 转换效率

Abstract:

Electro-spraying is an important technique to enhance combustion of liquid fuel in micro-scale. A new combustor with nozzle diameter of 0.8 mm and single electrode was designed and fabricated. Experimental studies on electro-spraying and combustion were carried out using alcohol as fuel. Results showed four different electro-spraying modes with the variation of nozzle potential. The specific charges were measured at different electro-spraying modes, which were lower at the pulsed-jet mode, increased greatly, and reached a stable value at the cone-jet mode. The atomized alcohol was ignited and combusted stably near the mesh, which can be regarded as a flame holder. The flame temperatures increased first and then decreased with the increase of equivalent ratio. The flame temperature reached the maximum value at the equivalent ratio of 1.0, and the maximum value increased with the increase of nozzle potential. At the equivalent ratio of 1.0, the combustion efficiency reached 89% and fuel conversion efficiency reached 90% at cone-jet mode. The stable electro-spraying mode and suitable equivalent ratio are very important to the enhancement of combustion of alcohol in micro-scale.

Key words: microscale, alcohol, fuel, electro-spraying, combustion efficiency, conversion efficiency

中图分类号:

TK16

甘云华, 佟洋, 罗智斌. 乙醇在微尺度单电极燃烧器内的雾化与燃烧[J]. 化工学报, 2015, 66(11): 4597-4602.

GAN Yunhua, TONG Yang, LUO Zhibin. Electro-spraying and combustion of alcohol in micro-combustorwith single electrode[J]. CIESC Journal, 2015, 66(11): 4597-4602.

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乙醇在微尺度单电极燃烧器内的雾化与燃烧

Electro-spraying and combustion of alcohol in micro-combustorwith single electrode

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