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论文类型：期刊论文

发表时间：2012-09-01

发表刊物：Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines)

收录刊物：EI、PKU、ISTIC、Scopus

卷号：30

期号：5

页面范围：415-422

ISSN号：10000909

摘要：Spray characteristics of a piezo outward-opening pintle-type injector, including spray angle, spray tip penetration and cycle fuel injection quantity, are investigated under different boundary conditions. Based on spray images, an empirical equation for spray axial tip penetration is obtained. Furthermore, for qualitatively analyzing the characteristics of spray distribution and atomization, a concept named spray volume enhancement ratio,    SVER, is proposed based on the experimental results. The images taken by ultra high-speed camera proves that the cone spray actually consists of hundreds of strings, instead of a continuous structure. This phenomenon provides evidence for further research on spray characteristics of this kind of injector.