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레이저시트광을 이용한 가시화 디젤엔진에서의 Soot 계측 제1보:가시화 디젤엔진의 제직 및 레이저를 이용한 Soot의 2D 화상촬영
이명준(Myungjun Lee),박태기(Taegi Park),하종률(Jongyul Ha),정성식(Sungsik Chung) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.2
In order to clarify the characteristics of soot formation and oxidation in-cylinder of diesel engine, it is necessary to diagnose accurately for combustion of in-cylinder. The past techniques for soot measurement have limitations in providing the characteristics of soot in a diesel engine, whereas, laser-based 2D imaging diagnostics have the potential to provide better temporally and spatially resolved measurements of the soot distribution.<br/> We rebuilt an optically accessible diesel engine which is similar to the conditions of a conventional engine and tried to measure soot distribution in a cylinder of the diesel engine using laser induced scattering(LlS) and laser induced incandescence(LII).<br/> Some results were acquired in this study. LIS and LlI signal that show soot distribution of a in-cylinder were taken by ICCD properly. The signal of LIS was intenser than that of LlI. Although they have some differences of signal intensity in early combustion period, both of signals show that they are generally similar in late combustion period, after ATDC 50 degree.
레이저시트광을 이용한 가시화 디젤엔진에서의 Soot 계측(제2보:Soot 입경분포 및 수밀도 계측)
이명준(Myungjun Lee),박태기(Taegi Park),하종률(Jongyul Ha),정성식(Sungsik Chung) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.3
The technique of laser sheet beam has been applied to optically accessible diesel engine for the quantitative measurement of soot. The results provide the information for us for reduction of soot in diesel engine. We used both LIS and LII techniques simultaneously in this study. LIS and LII images show the quantitative distribution of the soot concentration in an optically accessible diesel engine. In this study, several results were obtained by the simultaneous measurement of LIS and LII technique. The diameter and number density of soot in combustion chamber of the test engine were obtained from A TOC 20° to 110° . The increase rate of soot diameter was about 40% between ATOC 20° and 110° . And the number density of soot decreased significantly between ATOC 20° and 40° .