LIEF와 Mie 산란 방법을 이용한 직분식 가솔린 엔진의 스월 및 슬릿 인젝터의 분무 특성The Spray Characteristics of Swirl and Slit Injector to DISI Engine Using LIEF and Mie-scattering Method
- Other Titles
- The Spray Characteristics of Swirl and Slit Injector to DISI Engine Using LIEF and Mie-scattering Method
- Authors
- 이창희; 이기형; 황규민
- Issue Date
- Mar-2005
- Publisher
- 대한기계학회
- Keywords
- 난류발생시점; 감속점; 레이저 유도 형광법; 속도계수; 직분식 가솔린 엔진; Turbulent Occurring Point; Deceleration Point; LIEF; Velocity Coefficient; DISI Engine
- Citation
- 대한기계학회논문집 B, v.29, no.3, pp.356 - 367
- Indexed
- KCI
- Journal Title
- 대한기계학회논문집 B
- Volume
- 29
- Number
- 3
- Start Page
- 356
- End Page
- 367
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/46407
- ISSN
- 1226-4881
- Abstract
- The spray characteristics of DISI injector have a great role in gasoline engine efficiency and emission. Thus, many researchers have studied to investigate the spray characteristics of swirl and slit injectors that are used in a DISI engine. In this study, we tried to provide spray parameters, which affect on the spray characteristics such as injection pressure, ambient pressure and ambient temperature. In addition, we calculated tb and tc to investigate the break up mechanism of test injectors and obtained Cv to evaluate the spray characteristics. As the ambient pressure increases in case of slit injector, Cv decreases. The laser-induced exciplex fluorescence (LIEF) technique, which is based on spectrally resolved two-color fluorescent emissions, has applied to measure the liquid and vapor phases for on evaporating spray simultaneously. The TMPD/naphthalene proposed by Melton is used as a dophant to detect exciplex signal. The temporal and spatial distribution of liquid and vapor phases during the mixture formation process was measured by this technique. In the LIEF technique, the vapor phase is detected by the monomer fluorescence while the liquid phase is tracked by the exciplex fluorescence. From this experiment, we found that the spray area of the vapor phase is increased with elapsed time after injection and the area of liquid is decreased when the ambient pressure is 0.1MPa. However, the area tends to increase until the end of injection when the ambient pressure is 1.0MPa.
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Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MECHANICAL ENGINEERING > 1. Journal Articles
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