著者

白石 直 渡壁 壽人 佐郷 ひろみ 中村 友道 石谷 嘉英 此村 守 山口 彰 藤井 正

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2004, no.7, pp.103-104, 2004-09-04

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A flow-induced vibration test facility that simulates a hot leg piping of the Japanese sodium-cooled fast reactor (JSFR) with 1/3 scale is used to investigate the flow pattern and pressure fluctuations of the pipe. As the observation of flow pattern, the velocity distributions measured by LDV show the flow pattern is independent of Reynolds number at high Reynolds number. The maximum velocity is about 15 times the mean velocity in the elbow. A statistical analysis of the pressure fluctuations in a separation region shows the power spectrum is of white noise up to 20Hz, the autocorrelation sharply drops to zero less than 1 sec of time interval and the probability density distribution figures almost the Gaussian distribution, excepting its flatness-3 is 3.