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Combustion Behaviors of Emulsified Hydrocarbons and JP-4/N2H4Droplets at Weightless and Free Falling Conditions

 

作者: M. KIMURA,   H. IHARA,   S. OKAJIMA,   A. IWAMA,  

 

期刊: Combustion Science and Technology  (Taylor Available online 1986)
卷期: Volume 44, issue 5-6  

页码: 289-306

 

ISSN:0010-2202

 

年代: 1986

 

DOI:10.1080/00102208608960309

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

Combustion behaviors, mainly focused on the secondary micro-atomization phenomenon of oil-in-water (O/W) and water-in-oil (W/O) hydrocarbon emulsion droplets, were observed under weightless conditions, and compared with the combustion behaviors of free-falling emulsion droplets under the effect of gravitation. Experimental results are reported on the burning of droplets of puren-paraffine (C5-C15), gas-oil, kerosene, JP-4, and O/W type JP-4/N2H4emulsions suspended on a quartz tip. It was found that under weightless (zero gravity, no buoyancy) conditions in air no violent micro-explosion would occur with regard to n-tridedane, -tetradecane, -pentadecane, gas-oil, and JP-4 emulsions, but, for all of them, the onset of micro-explosions resulting in instantaneous droplet disruption was observed in quiescent air or free-falling combustion in oxygen enriched atmospheres under one gravity. “Spray-like” and non-disruptive micro-atomization under weightless conditions and importance of gravity which promotes the micro-explosion are described.

 

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