PIV/LIF Measurement of the Natural Circulation Around a Vertical Heated Rod
The Nuclear Training Reactor of the Institute of Nuclear Techniques (Budapest University of Technology and Economics, Hungary) is a pool-type reactor with light water moderator and with a maximum thermal power of 100 kW. The fuel elements are cooled by natural convection of the water. Investigation of reactor excursion scenarios showed that the process of the excursion and the maximum energy release are determined basically by the efficiency of the natural convection around the rods, the velocity of the cooling water and the heat transfer coefficient. These processes were investigated using an electrically heated rod, which models the geometry of a fuel pin in the training reactor. The electric power of the model rod is variable between 0-500 W. The rod is placed in a square-based glass tank. PIV (Particle Image Velocimetry) and LIF (Laser Induced Fluorescence) measurement techniques were used to study the velocity and temperature field of the natural convection around the electrically heated vertical rod. Several experiments were made at different levels of heating and different positions of the detected area. The hydraulic and the thermal boundary layer were detected. The experimental results match the theoretical expectations.
Particle Image Velocimetry Laser Induced Fluorescence vertical heated rod natural convection
Rita Szijártó Bogdán Yamaji Attila Aszódi
Institute of Nuclear Techniques, Budapest University of Technology and Economics 1111 Budapest, Müegyetem rkp. 9., Hungary
国际会议
上海
英文
1921-1929
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）