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논문 기본 정보

자료유형
학술대회자료
저자정보
Warsita I Wayan (University of Ulsan) Nguyen Ho Xuan Duy (University of Ulsan) PutraI Komang Gede Tryas Agameru (University of Ulsan) Ocktaeck Lim (University of Ulsan)
저널정보
한국자동차공학회 한국자동차공학회 춘계학술대회 2024 한국자동차공학회 춘계학술대회
발행연도
2024.6
수록면
104 - 112 (9page)

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초록· 키워드

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Determining the characteristics of diesel spray development is important for understanding its impact on combustion dynamics. This study explores the effects of blending n-butanol with diesel fuel on spray characteristics under compression ignition (CI) engine conditions. n-Butanol stands out as a promising alternative fuel for diesel engines employing advanced combustion modes. Experimental investigations were conducted in a constant volume chamber designed to replicate CI engine conditions, allowing for a thorough assessment of how the addition of n-butanol affects spray behavior. Experimental parameters included varying amounts of n-butanol added, injection pressure, and injector nozzle diameter. Injection pressures of 80, 100 and 120 MPa were employed, with different chamber ambient pressures. Additionally, the injector nozzle diameter varied between 0.28 and 0.33 mm. Within these parameters, the influence of the diesel and n-butanol blending ratio on macroscopic spray features was thoroughly examined. This impact was assessed by adjusting the blending ratio from 70% to 90% with a 10% increment to observe its effects on spray macroscopic characteristics, including spray formation, spray cone angle, spray penetration length, and spray area. The findings indicate the significant impact of n-butanol on the macroscopic characteristics of the spray. Increasing n-butanol content in diesel leads to a reduction in both kinematic viscosity and surface tension, thereby altering macroscopic spray formation. Consequently, average spray penetration length increases under all test cases, with DnB90 exhibiting the most significant changes compared to pure diesel while spray cone angle shown decreases at 80Mpa injection pressure. Furthermore, modest variations in spray area were observed across all tested fuels, suggesting that spray area is influenced not only by spray penetration but also by spray cone angles. The spray tip penetration and spray area of diesel/n-butanol blended fuels increase with injection pressure, while spray cone angle is most affected by change in nozzle diameter. A comprehensive discussion elucidating the processes behind these phenomena is provided.

목차

Abstract
1. INTRODUCTION
2. METHODOLOGY
3. RESULT AND DISCUSSIONS
4. CONCLUSION
References

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