高速成像诊断用于喷雾导引火花塞引燃直接喷射发动机（SGSIDI）的应用和进展

2017/09/14   下载量： 5 次

方案摘要

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应用领域 汽车及零部件
检测样本 汽车电子电器
检测项目 理化分析>其他
参考标准 暂无

采用LaVision公司特色的以DaVis软件平台和高速相机为基础构成的喷雾高速成像诊断测量系统（SprayMaster）对喷雾导引火花塞引燃直接喷射发动机（SGSIDI）内部燃料混合，注入等过程进行了测试和研究。

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Fuel/air mixing, in-cylinder flow, and spark discharge exhibit
large cycle-to-cycle variations in internal combustion engines. To
fully understand how each of those parameters affects ignition
stability, it is necessary to measure them at high rate and in more
than one dimension. Imaging diagnostics, such as laser induced
fluorescence (LIF) for fuel concentration measurements and particle
image velocimetry (PIV), have been useful in engine research
and development for almost two decades now. However,
measurements were mostly restricted to one image per cycle
and often not even in consecutive cycles. Very recently, the use
of CMOS cameras, multi-stage image intensifiers, and high repetition
rate diode-pumped Nd:YAG lasers has allowed sustained
LIF imaging measurements at 12 kHz (= 1 crank angle degree at
2000 RPM) for more than 1600 consecutive engine cycles. This
approach can be combined with PIV to yield simultaneous fuel
distribution and velocity fields. Here we focus on the description
of some intricate details of the high-speed flow diagnostic development
and illustrate their use with examples obtained in a
spray-guided spark-ignition direct-injection engine.

上一篇 在一个双稳湍流涡旋火焰中，对间歇性动态的时间-频率定位
下一篇 直接喷射火花塞引燃（DISI）引擎进气道产生的流动不稳定性

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北京欧兰科技发展有限公司
金牌会员 丨 第17年
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