Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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An Experimental Study for the Minimization of Soot Adsorption on the Optical Surface of an Engine Soot Detector (I)

엔진 수트 측정 센서 표면에서의 흡착 오염 저감을 위한 실험적 연구 (I)

  • 윤의성 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 김학열 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 공호성 (한국과학기술연구원 트라이볼로지 연구센터) ;
  • 한흥구 (한국과학기술연구원 트라이볼로지 연구센터)
  • Published : 2004.12.01
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Abstract

The adsorption of soot particles onto a sensor surface of the engine soot detector posses a critical problem in the measurement. In order to prevent the optical rod surface from soot contamination, various functional coatings and flow-induced cleaning were applied to the surface in this work. For surface coatings, various materials of self-assembled monolayers (SAM) such as OTS (octadecyltrichlorosilane), PFDTES (perfluorodecyl-triethoxysilane) and PFDTMS (perfluorodecyltrimethoxysilane) were coated on the optical rod surface ,which have different characteristics in both hydrophobicity and oleophobicity. These coatings were tested with soot content varying from $0\%\;to\;3wt\%$ and oil temperature from 20 to $70^{\circ}C$. Test results showed that surface coatings were not effective for preventing the adsorption of soot panicles on the surface of optical rod. It was thought that these coatings provided the surface with additional attractive surface forces. However, it was found that adsorption of soot particles onto a sensor surface was minimized by flow-induced cleaning. This effect was tested with varying the flow velocity.

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References

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