http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : ( Naoto Mizobuchi ) (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
( Naoto Mizobuchi ),( Hiroki Kambe ),( Eriko Matsumura ),( Takaaki Kitamura ) 한국액체미립화학회 2017 한국액체미립화학회 학술강연회 논문집 Vol.2017 No.-
Depletion of fossil fuel has become a serious problem by accelerating motorization in Asian countries. Furthermore, regulations on exhaust gas such as Particulate Matter (PM) and Nitrogen oxides (NOx) emitted from internal combustion engine are being strengthened year by year. Then, recent diesel engines are equipped with Diesel Particulate Filter (DPF) as after treatment device for exhaust gas, and PM is collected. However, with the long-term use of DPF, PM accumulates in DPF. As a result, PM collection efficiency deteriorates and pressure loss increases. Therefore, post injection has attracted attention as DPF regeneration method for burning and removing PM in DPF. In post injection, fuel is injected into the cylinder at the middle to late stage of expansion stroke, and unburned hydrocarbon is supplied to the Diesel Oxidation Catalyst (DOC). Then, oxidation heat is generated by oxidation reaction of unburned hydrocarbon and DOC. And the oxidation heat flows into the DPF, thereby burning and removing PM. However, oil dilution to the lubricating oil film on cylinder liner caused by post injection is a serious problem. Because oil dilution is leading to deterioration of sliding properties of piston and thermal efficiency, it is necessary to clarify spray impingement behavior on lubricating oil film. So in this research, we focus on the oil dilution phenomenon caused by post injection and aim for modeling oil dilution phenomenon. In this report, we measured the critical weber number which makes it possible to judge whether or not fuel droplets impinging on lubricating oil film deposits or splash. As a result, it was found that fuel droplets impingement behavior on lubricating oil film is classified into three behaviors by two critical weber numbers. First, We<sub>crP</sub> =(272+11600δ<sub>non</sub><sup>1.29</sup>)Lα<sup>0.01</sup>,second, We<sub>crS</sub> =(235+2255δ<sub>non</sub><sup>1.05</sup>)Lα<sup>0.05</sup>, La=ρ<sub>ο</sub>·σ<sub>ο</sub>·d<sub>in</sub>/μ<sub>ο</sub><sup>2</sup>, Here, ρ<sub>ο</sub> is density of engine oil, σ<sub>ο</sub> is surface tension of engine oil, μ<sub>ο</sub> is viscosity coefficient of engine oil, and Lα is Laplace number.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
