体心立方球床高温气冷堆流动及传热数值模拟

Numerical Simulation of Flow and Heat Transfer of High Temperature Gas Cooled Reactor with Body Centered Cubic Fuel Sphere Packed Bed

中文关键词: 高温气冷堆  模块化  流动  传热  数值模拟

英文关键词: high temperature gas cooled reactor  modular, flow  heat transfer  numerical simulation

中文摘要:

      在规则球床模块式高温气冷堆中，氦气在规则燃料球之间流动，并对燃料球进行冷却。将燃料球分为发热区和石墨包壳，考虑了燃料球内部热传导，以三个规则燃料球为一组，对氦气在燃料球中的流动与传热进行数值模拟，获得氦气在燃料球孔隙间的流场，以及燃料球与氦气的温度分布，并将燃料球出口边界的流动和传热参数传递给下一组燃料球入口边界，以实现大规模规则燃料球模块化高温气冷堆的数值模拟，预测燃料球与氦气的升温速率和压降率。

英文摘要:

      The helium flows in the ordered fuel spheres and cools the fuel spheres in the ordered bed modular reactor (OBMR). In this paper, each fuel sphere is divided into heating zone and graphite shell zone. With the consideration of the internal heat conduction in fuel sphere, flow and heat transfer of helium around fuel sphere are simulated with a group of three ordered fuel spheres to obtain the flow field of the helium in the space between the spheres and temperature distribution of the helium and the fuel sphere. The flow and heat transfer parameters of the outlet boundary are transferred to the inlet boundary of the next group in order to achieve numerical simulation of large-scale ordered fuel spheres in high temperature gas cooled reactor (HTGCR) to predict the temperature rising rate of fuel sphere and helium, and the pressure drop rate of the helium. The numerical results show that: the average temperature rising rates of the fuel spheres and the helium are 19.95 K/m and 19.93 K/m, respectively. The pressure drop rate of the helium is about 9156 Pa/m.