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LDVによる直接噴射式ディーゼル機関筒内流動の研究 : 低データレイト不等間隔データの乱れ解析

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タイトル: LDVによる直接噴射式ディーゼル機関筒内流動の研究 : 低データレイト不等間隔データの乱れ解析
その他のタイトル: Study on In-Cylinder Flow of Direct Injection Diesel Engine by LDV Measurements : Turbulence Analysis at Low Sampling Rate with Non-Uniform Time Intervals
著者: 植木, 弘信 / 石田, 正弘 / 江上, 弘孝
著者(別表記) : Ueki, Hironobu / Ishida, Masahiro / Egami, Hirotaka
発行日: 1989年 3月25日
出版者: 日本機械学会
引用: 日本機械学會論文集. B編 55(511) p.910-915, 1989
抄録: The authors have developed a method to analyze the turbulence scale accurately from the descrete data, which are usually obtained by LDV measurements, at low sampling rate with non-uniform time intervals. In this method, the turbulence correlation is calculated from the data of many engine cycles, and successively the turbulence spectrum is calculated from the inverse Fourier-transform of the turbulence correlation. The reliability of this method is confirmed by the model data sampled randomly on a sinusoidal process, and by the data measured in the cylinder of a motored diesel engine having a direct injection system. Furthermore, it is clearly shown that the spectrum in the frequency range higher than the Nyquist frequency defined by the mean data rate can be analyzed by this method, and that it is not necessary to change the range of frequency analysis despite a little variation of mean sampling rate.
キーワード: Internal Combustion Engine / Turbulence / Spectrum / Flow Measurements / LDV
URI: http://hdl.handle.net/10069/6734
ISSN: 03875016
資料タイプ: Journal Article
原稿種類: publisher
出現コレクション:060 学術雑誌論文

引用URI : http://hdl.handle.net/10069/6734



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