NUMERICAL STUDY ON PASSIVE CONTROL OF THERMAL STRIPING PHENOMENON USING LORENTZ FORCE IN FAST REACTOR
Liquid sodium, used as a coolant of fast reactor (FR), is an electromagnetic fluid. When a magnetic field is embedded to liquid sodium flow, the Lorentz force will be induced and flow structure such as a turbulent mixing phenomenon will be influenced. In a FR piping system, thermal fatigue is one of key issues that may occur after a piping junction of different fluid temperature. In the present paper, a numerical study of sodium flow induced by the Lorentz force on a turbulent mixing after the junction has been carried out. The large eddy simulation (LES) coupled with the electromagnetic field analysis is used for this purpose. The governing equations of the electric density field and the magnetic flux density fields are solved separately so that the solenoidal condition is satisfied noniteratively. The fractional step method is applied to the present coupling in the simulation. As a result of the numerical investigation, it is demonstrated that the temperature fluctuation due to turbulent mixing weakens after it runs through the magnetic field caused by the Lorentz force and thus the thermal fatigue will be suppressed. Accordingly, it is concluded that the passive control of the thermal fatigue will be possible by adding a magnetic field.
Takashi TAKATA Takeshi FUKUDA Akira YAMAGUCHI Akihiro UCHIBORI Nobuyuki KIMURA Hideki KAMIDE
Graduate School of Engineering, Osaka University 2-1 Yamada, Suita, Osaka, 565-0871, Japan Japan Atomic Energy Agency 4002 Narita, O-arai, Ibaraki, 311-1393, Japan
国际会议
18th International Conference on Nuclear Engineering(第18届国际核能工程大会 ICONE 18)
西安
英文
1-7
2010-05-17（万方平台首次上网日期，不代表论文的发表时间）