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Generation of Model Diesel Particles by Spark Discharge and Hydrocarbon Condensation
Hakjoon Kim,Jinho Kim,Youngjoo Choi,Hyenchul Oh,Jungbum Chu,Sangsoo Kim 대한기계학회 2006 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.20 No.11
This study was conducted in order to generate model particles which were similar to particles in diesel emission. Spark discharge was used for carbon agglomerates and hydrocarbon condensation for particles that consist of carbon agglomerates and hydrocarbon. The size of the carbon agglomerates, whose mean size were 30 and 70 ㎚, ranged between 15 and 200 ㎚, and the total number concentration of the particles ranged from 3 to 5 × 10?#/㎤ as the controllable variables in spark discharge generator changed. The result of the hydrocarbon condensation experiment showed that the final sizes of the particles enlarged by condensation did not depend on the initial sizes, but the maximum condensational growth of carbon agglomerates by dodecane (C₁₂ H₂?) condensation was 112 times the initial size of 40 ㎚, while the size of the agglomerates by benzene (C?H?) was 3.25 times its initial size.
스파크 방전과 탄화수소 응축을 이용한 모형디젤입자 발생과 모형입자에 대한 오존 영향
김학준(Hakjoon Kim),김진호(Jinho Kim),최영주(Youngju Choi),오현철(Hyenchul Oh),추정범(Jungbum Chu),김상수(Sangsoo Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
This study was conducted in order to generate model particles of particles in diesel emission without engine setup and then to investigate a way to remove those particles by ozone treatment. The particles, which consist of carbon agglomerates and hydrocarbon, were generated from a spark discharge generator and hydrocarbon condensation. The sizes of enlarged carbon particles by the condensation of benzene(C?H?) and dodecane(C₁₂H₂?) did not depend on the initial sizes, 40 and 80㎚. But the maximum condensational growth of carbon agglomerates by dodecane condensation was 112 times as the initial size, 40nm, while that of the agglomerates by benzene was 3.25 times. And ozone treatment on the particles made the size distribution shift to lower size range, which means their mean size decreased by the maximum value, 8.8%.