Analysis of high-pressure diesel spray formation in the early stage of injection
Analysis of high-pressure diesel spray formation in the early stage of injection
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DOI：
10.1615/atomizspr.v7.i1.20
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发表时间：
1997-01-01
影响因子：
1.2
通讯作者：
Nakamura, H
中科院分区：
文献类型：
--
作者：
Takahashi, H;Yanagisawa, H;Nakamura, H
本文用放大阴影照相法研究了柴油机高压喷雾在喷射初期的特性。为了阐明初始阶段的发展机制，覆盖了两种喷射压力历史和宽范围的气门开启压力。直到喷射开始后的0.3ms，存在一个区域，在该区域处，尖端穿透对环境压力不敏感，该区域随着气门开启压力的增加而变短。喷雾形成过程的这一特征与喷雾中产生的涡流运动有关。
The characteristics of a high-pressure diesel spray in the early stage of injection are examined by use of enlarged shadowgraphy, under both atmospheric and pressurized conditions. To clarify the mechanisms of the initial stage development, two kinds of injection pressure history and a wide range of valve opening pressures are covered, Until 0.3 ms after the start of injection, there is a region at which the tip penetration is insensitive to the ambient pressure, which becomes shorter with an increase in the valve opening pressure. This characteristic feature of the spray formation process is related to the eddy motion generated ill the spray.