球床堆流动与传热数值模拟

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基金项目:

国家自然科学基金资助项目(11075042)

Numerical Simulation of Fluid Flow and Heat Transfer in Pebble Bed Reactor

National Key Discipline Laboratory of Nuclear Safety and Simulation Technology, Harbin Engineering University, Harerbin, 150001, China

摘要: 采用离散元方法(DEM)模拟球床反应堆内燃料球的随机分布,通过计算流体力学(CFD)方法研究球床堆内的流动与传热。结果表明:球与球之间的间隙处压力较低;而流速、温度、涡强度较高。沿径向分布,压力、涡强度、换热系数随孔隙率的增加而降低;流速随孔隙率的增加而增加。
- 离散元方法 /
- 计算流体力学 /
- 球床堆
Abstract: The DEM approach is used to simulate the random distribution of fuel spheres.The purpose of this work is to study the flow fluid and heat transfer by means of CFD techniques.Analysis shows that the pressure is lower,but the velocity,eddy and temperature are higher in the clearance.The pressure,eddy and heat transfer coefficient are increased with the porosity reduction,but velocity is reduced with the porosity reduction.
- Discrete element method /
- Computational fluid dynamics /
- Pebble bed reactor