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Title: ディーゼル噴霧における混合気形成および着火のLES 解析
Other Titles: LES Analysis of Mixture Formation and Ignition in a Diesel Spray
Authors: 小島, 宏一  KAKEN_name
川那辺, 洋  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9525-4841 (unconfirmed)
石山, 拓二  kyouindb  KAKEN_id
Author's alias: KOJIMA, Hirokazu
KAWANABE, Hiroshi
ISHIYAMA, Takuji
Keywords: Diesel Engine
Large-Eddy Simulation
Mixing
Ignition
Fuel Spray
Non-Homogeneity
Issue Date: Mar-2012
Publisher: 日本機械学会
Journal title: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Volume: 78
Issue: 787
Start page: 652
End page: 662
Abstract: Numerical calculation based on large eddy simulation was carried out to investigate mixture formation process in a spray formed by injecting n-heptane into a constant volume vessel under high-temperature and high-pressure conditions. Liquid phase of fuel was described by discrete droplet model. The results show that the shape of spray is similar to that of visualized image and spray tip penetration corresponds well to experimental results. In addition, distributions of fuel concentration and local non-homogeneous distribution were discussed by comparing the calculation results with the mixture distributions measured using planer laser induced fluorescence technique. The local distributions were well described except around downstream spray boundary. Calculations were also carried out for lower injection pressure condition and smaller nozzle orifice diameter condition. Although fuel concentration in a spray does not quantitatively reproduce the experimental results, the effects of the injection conditions qualitatively agreed with the experiments. Furthermore, ignition and combustion processes were investigated using Schreiber's model for calculating the progress of oxidation reactions.
Rights: © 2012 一般社団法人 日本機械学会
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/156034
DOI(Published Version): 10.1299/kikaib.78.652
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