Large-eddy simulation of thermal fatigue in a mixing tee
作者： Tingzhen Ming , Jiyun Zhao
DOI: 10.1016/J.IJHEATFLUIDFLOW.2012.06.002
关键词: Materials science 、 Piping 、 Computer simulation 、 Mechanics 、 Turbulence 、 Vortex 、 Mixing (process engineering) 、 Large eddy simulation 、 Thermal 、 Attenuation
摘要: Abstract Temperature fluctuations occur due to thermal mixing of hot and cold streams in the T-junctions piping system nuclear power plants, which may cause fatigue system. In this paper, three-dimensional, unsteady numerical simulations coolant temperature at a T-junction equal diameter pipes were performed using large eddy simulation (LES) turbulent model. The experiments used paper benchmark by Hitachi Ltd. calculated normalized mean temperatures fluctuating are good agreement with measurements. influence time-step ranging from 100 Hz 1000 Hz on results was explored. indicate that all different frequencies agree well experimental data. Finally, attenuation fluctuation fluid also investigated. It is found that, drastic occurs within range less than L / D = 4.0; does not always attenuate pipe center wall continuous generation vortexes. At top wall, position = 1.5 has minimum peak value root-mean square temperature, whereas bottom having same characteristics = 2.0.
sci-hub.se 参考文章(32)
Robert Zboray, Horst-Michael Prasser, On the relevance of low side flows for thermal loads in T-junctions Nuclear Engineering and Design. ,vol. 241, pp. 2881- 2888 ,(2011) , 10.1016/J.NUCENGDES.2011.05.002
V.S. Naik-Nimbalkar, A.W. Patwardhan, I. Banerjee, G. Padmakumar, G. Vaidyanathan, Thermal mixing in T-junctions Chemical Engineering Science. ,vol. 65, pp. 5901- 5911 ,(2010) , 10.1016/J.CES.2010.08.017
Jeong Ik Lee, Lin-wen Hu, Pradip Saha, Mujid S. Kazimi, Numerical analysis of thermal striping induced high cycle thermal fatigue in a mixing tee Nuclear Engineering and Design. ,vol. 239, pp. 833- 839 ,(2009) , 10.1016/J.NUCENGDES.2008.06.014
Tao Lu, PX Jiang, ZJ Guo, YW Zhang, H Li, None, Large-eddy simulations (LES) of temperature fluctuations in a mixing tee with/without a porous medium International Journal of Heat and Mass Transfer. ,vol. 53, pp. 4458- 4466 ,(2010) , 10.1016/J.IJHEATMASSTRANSFER.2010.07.001
Masayuki Kamaya, Akira Nakamura, Thermal stress analysis for fatigue damage evaluation at a mixing tee Nuclear Engineering and Design. ,vol. 241, pp. 2674- 2687 ,(2011) , 10.1016/J.NUCENGDES.2011.05.029
C. Walker, A. Manera, B. Niceno, M. Simiano, H.-M. Prasser, Steady-state RANS-simulations of the mixing in a T-junction Nuclear Engineering and Design. ,vol. 240, pp. 2107- 2115 ,(2010) , 10.1016/J.NUCENGDES.2010.05.056
Jean-Marc Ndombo, Richard J.A. Howard, Large Eddy Simulation and the effect of the turbulent inlet conditions in the mixing Tee Nuclear Engineering and Design. ,vol. 241, pp. 2172- 2183 ,(2011) , 10.1016/J.NUCENGDES.2011.03.020
Yu-Hong Dong, Xi-Yun Lu, Large eddy simulation of a thermally stratified turbulent channel flow with temperature oscillation on the wall International Journal of Heat and Mass Transfer. ,vol. 47, pp. 2109- 2122 ,(2004) , 10.1016/J.IJHEATMASSTRANSFER.2003.12.011
B. Wegner, Y. Huai, A. Sadiki, Comparative study of turbulent mixing in jet in cross-flow configurations using LES International Journal of Heat and Fluid Flow. ,vol. 25, pp. 767- 775 ,(2004) , 10.1016/J.IJHEATFLUIDFLOW.2004.05.015
Masaaki TANAKA, Hiroyuki OHSHIMA, Hideaki MONJI, Thermal Mixing in T-Junction Piping System Related to High-Cycle Thermal Fatigue in Structure Journal of Nuclear Science and Technology. ,vol. 47, pp. 790- 801 ,(2010) , 10.1080/18811248.2010.9711655