In this study, the shape optimization of the injector according to fuel and tip was conducted through analytical techniques. As an analysis condition, a flow rate of 0.08 kg / s was applied to the inlet and the outlet was given a condition of 0 Bar. The working fluid for each fuel was applied. As a result of the analysis, it can be seen that the pressure and velocity of model with the modified tip become higher than that of the base model in diesel. Compared with the base model in the case of gasoline, the modified model of the tip was found to have more stable injection when the pressure inside the combustion chamber and the straightness of the fuel were observed. Finally, in case of LPG injector, the same modified tip as gasoline was found to be the more stable injection. On the basis of this study result, the shape parameters of the injector can be inferred.

ABSTRACT
1. 서 론
2. 모델링 및 해석 조건
    2.1 3D 모델링
    2.2 유동해석 조건
3. 해석 결과
    3.1 Diesel 인젝터의 해석 결과
    3.2 Gasoline 인젝터의 해석 결과
    3.3 LPG 인젝터의 해석 결과
    3.4 연료 및 팁의 개수에 따른 결과 비교 및 도찰
4. 결 론
References

• 김호국(Department of Mechanical Engineering, Graduate School, Kongju National University) | Ho-Kook Kim
• 조재웅(Division of Mechanical & Automotive Engineering, Kongju National University) | Jae-Ung Cho
• 전용두(Division of Mechanical & Automotive Engineering, Kongju National University) | Yong-Du Jun Corresponding Author