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최정식(J. S. Choi),김원태(W. T. Kim),오제하(J. H. Oh),강신재(S. J. Kang),노병준(B. J. Rho) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
The Spray performance of a fuel injector have an important effect upon engine power and emission. This study discusses the spray behavior of an intermittent injection using a gasoline fuel injector. Image processing system and PDA system was utilized for the visualization of a spray behavior and the measurement of a fuel drop size and mean velocity. respectively. Fuel injection duration was fixed with 3ms and injection pressure was varied. As results. mean spray arrival time is linear increased with spray axis distance. Spray axis velocity linear correlate with fuel drop size in the time interval of an injected main spray.<br/>
최정식(J.S. Choi),김원태(W.T. Kim),강신재(S.J. Kang),노병준(B.J. Rho) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
This study was investigated the spray behavior of an intermittent injection using a gasoline fuel injector with an air assisted type adaptor. Image processing system and POA system were utilized for the visualization of a spray behavior and the measurement of a fuel drop size and mean velocity, respectively. Fuel injection duration was fixed with 3ms. Injection pressure and air-supply pressure were varied. As results, axial velocity showed to correspond trend in a downstreem regardless of air supply pressure. In case of air-supply, SMD was decrease in comparison with no air.<br/>
ESPI를 이용한 노즐과 동체이음 용접부의 내부결함 측정에 관한 연구
이승호(S. H. Lee),강영준(Y. J. Kang),이남권(N. G. Lee),이동환(D. H. Lee),강신재(S. J. Kang),김성종(S. J. Kim) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.9
Recently the necessity of study on optical measuring method using laser to detect the pipeline's defect in nuclear facilities, chemical industries and power plants has been increased. Because laser light can be delivered to a remote area without any difficulties, the application of laser in many industries can solve several difficulties from the limitation of access in danger area and reduce the risks of workers. Therefore, we applied a new experimental technique to the measurement of internal defects in weld zone with the combination of ESPI and image processing technique and detected the internal cracks of weld zone in the former paper.