A new approach to understand liquid injection into atmospheric plasma jets

SURFACE & COATINGS TECHNOLOGY

卷:220

Article; Proceedings Paper

Soysal, Dennis¹  Ansar, Asif¹ 

[1] German Aerosp Ctr DLR, Inst Tech Thermodynam, Cologne, Germany

关键词: Diagnostics;    Liquid injection;    Thermal spraying;    High speed imaging;    Infrared imaging;   

DOI  :  10.1016/j.surfcoat.2012.12.009

来源: Elsevier

【 摘 要 】

Infrared images are used to characterize the atmospheric plasma and the influence of liquid injection into it. In the infrared spectral range low energies of rotational vibrational transitions can be captured which are emitted by hot liquid vapors. These vapor streams enable the qualification of the injection depth. High speed shadowgraphy is used to prove the correlations between vapor cloud and drop atomization behavior. In addition the combustion of organic liquids like ethanol and pentanol can be seen directly with an increase of emitted radiation. A direct correlation between vapor cone and liquid properties can be made. Lower Ohnesorge numbers lead to more focused vapor beams. (C) 2012 Elsevier B.V. All rights reserved.

【 授权许可】

Free