대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제27권6호
  • /
  • Pages.677-684
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  • 2003
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  • 1226-4881(pISSN)
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  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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간접 광대전에 의한 서브 마이크론 입자의 단극하전 특성

The Unipolar Charging Characteristics of Submicron Particles by Using an Indirect Photoelectric Charging

  • 최영주 (한국과학기술원 기계공학과 입자공학연구실) ;
  • 김상수 (한국과학기술원 기계공학과)
  • 발행 : 2003.06.01
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초록

A new unipolar aerosol charger was developed by using an indirect photoelectric charging. The charger consists of two coaxial tubes, the inner UV lamp wrapped with stainless mesh and the outer Al cylinder. In this study, the effects of flow rate, particle size, and electric field were examined to search the optimal charging conditions with experimental and numerical methods. Monodisperse NaCl particles were fed into an annular space and the particles were charged by negative ions generated from Al plate exposed to the UV light. According to experimental results, the average number of elementary charge on particles increases from 2.5 to 5.5 as particle size increases from 50nm to 130nm at 2.5 L/min and 100V. The average number of elementary charge on particles was maximized at 25V as the electric potential between the stainless mesh and Al plate was varied from 0V to 400V.

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참고문헌

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