Mechanism analysis of quasi-static dense pebble flow in pebble bed reactor using phenomenological approach

作者：Yang X T^*; Hu W P; Jiang S Y; Wong K K L; Tu J Y

来源：Nuclear Engineering and Design, 2012, 250: 247-259.

DOI：10.1016/j.nucengdes.2012.06.011

By means of the four basic forms of the phenomenological method, experimental results have intuitionally disclosed the physical mechanism from various views of the quasi-static pebble flow in a pebble bed reactor and successfully verified the availability of the discrete element method, on which the parameter effects have been investigated, including different base cone angle and different friction coefficient. The flow fields under different parameters have been discussed. On the basis of these researches, a framework of the general understanding of pebble flow mechanism has been drawn; many essential problems are discussed, including the interpretation of the quasi-static pebble flow, force analysis inside the pebble packing, propagation and distribution of the voids, internal equilibrium arches, competition mechanism, internal collapse, self-organization, equivalent shear force, equivalent normal force, the physical process of stagnant zone's influence on the overall flow field, and so on. All of these are very helpful to understand the physical mechanism of the quasi-static pebble flow in a pebble bed reactor.

• 出版日期2012-9
• 单位清华大学