初始压力和狭缝高度对狭缝内起爆距离影响的实验

张彭岗; 潘振华; 朱跃进; 王谦

doi:10.13224/j.cnki.jasp.2015.09.003

初始压力和狭缝高度对狭缝内起爆距离影响的实验

doi: 10.13224/j.cnki.jasp.2015.09.003

江苏大学能源与动力工程学院, 江苏镇江 212013

基金项目:

江苏省自然基金(BK20130510)

国家自然科学基金(51306073,11402102)

江苏省博士后基金(1301050C)

详细信息

作者简介:
张彭岗(1974-),男,陕西泾阳人,讲师,博士,主要从事爆轰学领域研究.

通讯作者:
潘振华(1981-),男,江苏丹阳人,讲师,博士,主要从事爆轰学领域研究,zhenpan@ujs.edu.cn

中图分类号: V231.22
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- 被引次数: 0
出版历程
- 收稿日期: 2014-11-11
- 刊出日期: 2015-09-28

Experiment on effect of initial pressure and narrow gap height on detonation initiation distance in narrow gap

School of Energy and Power Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, China

摘要

摘要: 为获得狭缝内爆轰波起爆距离(DID)的变化规律,分别在宽度为10mm,高度为1.0,2.2,2.9,4.0mm,长度为1220mm的狭缝爆轰管内对不同初始压力下(5~45kPa)化学当量比的乙烯/氧气混气进行单次爆轰性能实验研究.根据烟迹法、高速摄影图片判定起爆位置,得到初始压力和狭缝高度对爆轰波起爆距离的影响规律.结果表明:①在初始压力为10~20kPa时,起爆距离随着狭缝高度增加逐渐缩短;②在初始压力为25~40kPa时,起爆狭缝距离随着狭缝高度变大先降低后增加,在初始压力为45kPa时,起爆距离随着狭缝高度增加而变长;③综合初始压力和狭缝高度的影响,初步得到起爆距离随初始压力和狭缝高度等参数变化的量纲归一化经验公式.
- 微燃烧 /
- 微爆轰 /
- 狭缝 /
- 起爆距离 /
- 初始压力
Abstract: Single detonation in stoichiometric ethylene/oxygen mixtures was experimentally studied at initial pressure (5-45kPa) to achieve change rule of detonation initiation distance (DID) of detonation wave in narrow gap. The narrow gap detonation tube was formed by the cross-section with width of 10mm, height of 1.0,2.2,2.9,4.0mm, and length of 1220mm. Detonation initiation position was decided by soot records and high-speed digital imaging. Effect law of initial pressure and narrow gap height on detonation initiation distance was achieved. The results indicate that: (1) detonation initiation distance is reduced with the increase of narrow gap height at initial pressure of 10-20kPa; (2) detonation initiation distance initially decreases with increase of narrow gap height and then increases at initial pressure of 25-40kPa, and increases at initial pressure of 45kPa with the increase of narrow gap height; (3) compositing the influence of initial pressure and the narrow gap height, non-dimensional empirical formula for detonation initiation distance varying with initial pressure and narrow gap height is achieved.
- micro-combustion /
- micro-detonation /
- narrow gap /
- initiation distance /
- initial pressure

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