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首页> 外文期刊>Journal of instrumentation: an IOP and SISSA journal >Evaluation and optimization of the structural parameter of diesel nozzle basing on synchrotron radiation imaging techniques
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Evaluation and optimization of the structural parameter of diesel nozzle basing on synchrotron radiation imaging techniques

机译:基于同步辐射成像技术的柴油机喷嘴结构参数评估与优化

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摘要

Lacking of efficient methods, industry currently uses one only parameter - fuel flow rate - to evaluate the nozzle quality, which is far from satisfying the current emission regulations worldwide. By utilizing synchrotron radiation high energyX-ray in Shanghai Synchrotron Radiation Facility (SSRF), together with the imaging techniques, the 3D models of two nozzles with the same design dimensions were established, and the influence of parameters fluctuation in the azimuthal direction were analyzed in detail. Results indicate that, due to the orifice misalignment, even with the same design dimension, the inlet rounding radius of orifices differs greatly, and its fluctuation in azimuthal direction is also large. This difference will cause variation in the flow characteristics at orifice outlet and then further affect the spray characteristics. The study also indicates that, more precise investigation and insight into the evaluation and optimization of diesel nozzle structural parameter are needed.
机译:缺乏有效的方法,工业上目前仅使用一个参数-燃料流率-来评估喷嘴质量,这远远不能满足全球当前的排放法规。利用上海同步辐射装置(SSRF)中的同步辐射高能X射线,结合成像技术,建立了设计尺寸相同的两个喷嘴的3D模型,并分析了参数波动对方位角的影响。详情。结果表明,由于节流孔未对准,即使设计尺寸相同,节流孔的入口倒圆半径也有很大差异,并且其在方位角方向上的波动也很大。这种差异将导致节流孔出口处的流量特性发生变化,进而进一步影响喷雾特性。研究还表明,需要对柴油喷嘴结构参数的评估和优化进行更精确的研究和洞察。

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