Development and application of an automatic measurement method for nozzle orifice diameter and length

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• 作者：Zhi-long Li (1) (2)
  Zhi-jun Wu (2)
  Ya Gao (2)
  Wei-di Huang (2)
  Hui-feng Gong (2)
  Lin Zhang (2)
  Li-guang Li (1)
  
• 关键词：Diesel nozzle ; Orifice diameter ; Orifice length ; X ; ray tomography ; TH71 ; 鏌存补鍠峰槾 ; 鍠峰瓟鐩村緞 ; 鍠峰瓟闀垮害 ; X 灏勭嚎CT鎵弿
• 刊名：Journal of Zhejiang University - Science A
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：16
• 期：1
• 页码：11-17
• 全文大小：892 KB
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• 作者单位：Zhi-long Li (1) (2)
  Zhi-jun Wu (2)
  Ya Gao (2)
  Wei-di Huang (2)
  Hui-feng Gong (2)
  Lin Zhang (2)
  Li-guang Li (1)
  
  1. School of Mechanical Engineering, Tongji University, Shanghai, 200092, China
  2. School of Automotive Studies, Tongji University, Shanghai, 200092, China
  
• 刊物类别：Engineering
• 刊物主题：Physics
  Mechanics, Fluids and Thermodynamics
  Chinese Library of Science
  
• 出版者：Zhejiang University Press, co-published with Springer
• ISSN：1862-1775

文摘

Diesel sprays are important to engine combustion and emission formation processes, however, their behaviors are difficult to predict as they are very sensitive to the internal geometries of the nozzle. Based on synchrotron radiation X-ray tomography, a novel method is presented for measuring automatically the orifice diameter and length of fuel nozzles. According to this method, a clear definition of orifice inlet and outlet is given, and the diameters along the orifice from inlet to outlet as well as the orifice length can be measured. Measurements of a single-hole nozzle and an eight-hole nozzle have been performed accordingly. The results show that this method can automatically measure the orifice diameters from outlet to inlet along the whole orifice axis with relatively high precision, regardless of whether it is a single-hole or a multi-hole nozzle. The profile of the diameters obtained shows the differences between the nominal dimensions and the actual ones, which gives a more precise feedback for nozzle manufacture, and provides a new basis for precisely studying the impacts of internal geometries on spray behavior.