Publisher : The Korean Society for Noise and Vibration Engineering
DOI : 10.5050/KSNVE.2016.26.2.203
Title & Authors
Numerical Analysis of Added Mass Coefficient for Outer Tubes of Tube Bundle in a Circular Cylindrical Shell Yang, Keum-Hee; Ryu, Ki-Wahn;
According to the wear detection history for the steam generator tubes in the nuclear power plant, the outer tubes inside the steam generator have more problems on the flow-induced vibration than inner tubes. Many researchers and engineers have used a specified added mass coefficient for a given tube array during the design stage of the steam generator even though the coefficient is not constant for entire tube in cylindrical shell. The aim of this study is to find out the distribution of added mass coefficients for each tube along the radial location. When numbers of tubes inside a cylindrical shell are increased, values of added mass coefficients are also increased. Added mass coefficients at outer tubes are less than those of inner tubes and they are decreased with increasing the gap between the outermost tube and the cylindrical shell. It also turns out when the gap between the outermost tube and the cylindrical shell approaches infinite value, the added mass coefficient converges to an asymptotic value of given tube array in a free fluid field.
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