著者

須藤 浩三 高見 敏弘 矢野 賢司

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 B編 (ISSN:03875016)

巻号頁・発行日

vol.58, no.548, pp.1015-1021, 1992-04-25 (Released:2008-03-28)

参考文献数

10

被引用文献数

7 4

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An experimental study has been carried out for the turbulnt flow through a circular-sectioned 90°bend of a curvature radius ratio of 4.0 with inlet and outlet straight pipes attached. Three components of mean and fluctuating velocities were measured by the technique of rotating a probe with an inclined hot wire under a Reynolds number of 60000. The flow patterns of main and secondary streams, and Reynolds stress distributions in pipe sections are illustrated with figures, and explanations are added on the process of phenomena in the streamwise direction.

著者

高橋 真一 中村 祐二 山下 博史 鎌田 祐一 矢野 賢司 橋本 みゆき 伊藤 誠

出版者

一般社団法人日本機械学会

雑誌

熱工学コンファレンス講演論文集

巻号頁・発行日

vol.2004, pp.59-60, 2004-11-10

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In this paper, a dependence factor of soot emissivity on wavelength, a is studied in a counterflow propane diffusion flame by spectroscopic measurement. The spectrometer is set vertically to the nozzle and radiation of luminous flame is obtained each height from the lower burner. The emissivity is calculated from emissive power of luminous flame and blackbody furnace, and a is obtained by analysis of the emissivty. The relations between a and temperature, wavelength and distance from lower burner are examined. Results show that a is smaller with longer wavelength in the range of 600nm - 1000nm. Additionally, it is suggested that a also depends on soot conditions.