Laser induced-exciplex-fluorescence (EXCIPLEX) proposed by Melton is used to visualize fuel vapor in spray combustion. However, in the EXCIPLEX method based on TMPD/naphthalene system, the TMPD : naphthalene ratio is strictly restricted to 1 : 9. In addition, fluorescence intensity due to the vapor phase is extremely weak. To overcome these drawbacks, we propose a new laser-induced-excimer fluorescence (EXCIMER) method to visualize the liquid and vapor phases simultaneously. The spatial distributions of liquid and vapor in fuel spray suspended by ultrasonic waves are compared using the EXCIPLEX and EXCIMER methods. The correlation between fuel vapor concentration and fluorescence intensity is experimentally investigated by measuring the fluorescence intensity of saturated vapor formed over liquid fuel at a controlled temperature. These experimental results indicate that the EXCIMER method is effective for evaluating fuel vapor visualization in spray combustion. Furthermore, the quantitative distribution of fuel vapor concentration can be correctly estimated by the EXCIMER method.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 실험 장치
  2.2. 연료증기의 농도측정 원리
  2.3. Exciplex 형광법의 광학계 및 형광화상 촬영시스템
 3. 결과 및 고찰
  3.1. Exciplex 형광법에 의한 기상·액상 동시측정
  3.2. Excimer 형광법의 형광제 선정 및 형광 특성
  3.3. Excimer 형광법에 의한 기상·액상 동시측정
 4. 결 론
 REFERENCES

• 황승민(호서대학교 건축토목환경공학부 환경공학전공) | Seung-min Hwang (Department of Environmental Engineering, Hoseo University) Corresponding author