液体射流喷入横向气流混合特性研究进展
收稿日期: 2013-05-15
修回日期: 2013-07-23
网络出版日期: 2013-08-09
Progress on the Mixing of Liquid Jet Injected Into a Crossflow
Received date: 2013-05-15
Revised date: 2013-07-23
Online published: 2013-08-09
随着低污染燃烧技术的发展,液体射流在横向亚声气流中的液雾混合特性越来越受到关注。因此对液体射流在横向亚声气流中的研究进展进行了综述,综述内容主要包括3个方面:液体射流在横向气流中雾化破碎;液体射流的穿透深度;液雾在横向气流中的散布和输运。大部分研究工作是针对单个直射式液体射流喷入均匀横向气流中的,也有研究考察了燃油脉动、气流不均匀或者旋转气流条件下射流在横向气流中的混合特性,然而对多喷射点或气动雾化直射式喷嘴形成的液雾在横向气流中的混合特性的研究工作开展的相对较少。最后对液体射流在横向气流中的国内外试验研究工作进行了简要的概括。通过对国内外相关研究进展的概括,并且以先进航空发动机低排放燃烧室中的雾化方式为背景,提出了液体横向射流混合特性研究应进一步完善的工作内容。
林宇震 , 李林 , 张弛 , 徐华胜 . 液体射流喷入横向气流混合特性研究进展[J]. 航空学报, 2014 , 35(1) : 46 -57 . DOI: 10.7527/S1000-6893.2013.0346
Attention is now focused on the spray mixing characteristics of liquid jet injected into subsonic air crossflows as a development of low emission combustion technology. This paper summarizes the research progress in this field. The review is mainly about the experimental research work carried out at home and abroad, from three aspects: the atomization and breakup of a liquid jet in a crossflow, liquid jet penetration in the crossflow, and spray dispersion and transport in the crossflow. In most studies a liquid jet from a single plain orifice is transversely injected into a uniform airflow. The influences of fuel pulsation, shear layer and swirl in the airflow on spray mixing characteristics are studied experimentally. However, few studies are carried out on the mixing of an airblast-atomized liquid spray or multiple liquid jet injected into a crossflow. Finally a brief summary is given of the experimental studies on the spray mixing characteristics of a liquid jet injected into a crossflow. According to the review of the progress on the mixing characteristics of liquid jet, further research work is proposed by this paper with the application on atomization in advanced low emission combustors as the background.
Key words: liquid jet; crossflow; mixing; breakup; penetration height; low emission
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