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Yuki, Kazuhisa*; Sugawara, Yoshimasa*; Hosseini, S. M.*; Hashizume, Hidetoshi*; Toda, Saburo*; Tanaka, Masaaki; Muramatsu, Toshiharu
Nuclear Science and Engineering, 158(2), p.194 - 202, 2008/02
Times Cited Count：3 Percentile：23.44(Nuclear Science & Technology)This study aims at clarifying a relationship between non-isothermal fluid mixing in a T-junction area with 90-deg bend upstream and temperature fluctuations induced by the unstable mixing, by visualizing the flow fields with particle image velocimetry and measuring fluid-temperature fluctuation in the vicinity of a wall. By the experiment, flow-pattern of the jet flowing out from a branch pipe and characteristics of temperature fluctuation in mixing area were clarified in relation to the secondary flow generated in the 90-deg bend.
Sugawara, Yoshimasa*; Yuki, Kazuhisa*; Hashizume, Hidetoshi*; Tanaka, Masaaki; Muramatsu, Toshiharu
JNC TY9400 2004-027, 65 Pages, 2004/10
JNC-TY9400-2004-027.pdf:12.54MB
In this study, non-isothermal fluid mixing experiments in a T-junction area with a 90-degree bend upstream were carried out to estimate the fluid-temperature fluctuation in the vicinity of wall. The temperature fluctuations for various flow mixing conditions were measured, changing a velocity ratio and a pipe diameter ratio of a main pipe to a branch pipe to quantitatively evaluate the effect of a secondary flow on the temperature fluctuation. In addition, by analyzing both the visualization data taken by a PIV system and the temperature fluctuation data, it was attempted to construct a prediction formula for the temperature fluctuation.
