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Volume 40 Issue 4
Apr.  2014
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Journal of Beijing University of Aeronautics and Astronautics  > 2014  >  40(4): 564-568.
Li Fan, Zhu Yuelin, Huang Yanfei, et al. Anti-coking performance of nozzle materials’ surface chemical modification[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(4): 564-568. doi: 10.13700/j.bh.1001-5965.2013.0326(in Chinese)
Citation: Li Fan, Zhu Yuelin, Huang Yanfei, et al. Anti-coking performance of nozzle materials’ surface chemical modification[J]. Journal of Beijing University of Aeronautics and Astronautics, 2014, 40(4): 564-568. doi: 10.13700/j.bh.1001-5965.2013.0326(in Chinese)
shu

Anti-coking performance of nozzle materials’ surface chemical modification

doi: 10.13700/j.bh.1001-5965.2013.0326

  • 1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;

  • 2. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China;

  • 3. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 06 Jun 2013
  • Publish Date: 20 Apr 2014
    Abstract
  • Based on the problem of technical performance and service life of the aero-engine with a mass of coking on nozzles, steady rich chromium oxide layer was prepared on the aircraft engine nozzle materials' surface through the chemical oxidation-cathodic reduction method. The sample surface was characterized by scanning electron microscope, energy dispersive spectrometer and contact angle measuring device. Static coking quality determination and dynamic aero-engine bench combustion test was carried out. The anti-coking mechanism of chemical modification was discussed. It is found that the materials' surface is flat, and oxidation film particles closely arrange. Nozzle materials' anti-coking performance is closely related with surface composition and interfacial tension. The highest static anti-coking rate is up to 12.5%. Dynamic combustion experiment has more significant effect.

     

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