高温堆燃料元件气动力提升过程的数值模拟

为研究高温气冷堆中燃料球的气动力提升过程，本文采用三维计算流体力学数值模拟与三自由度动力学仿真解耦的方法对燃料球的运动轨迹进行了模拟。通过计算流体力学方法计算了燃料球在提升管内所受的气动力，运用三自由度动力学仿真给出了燃料球在输送管道内的运动轨迹。将数值模拟的运动轨迹与实验测量的结果进行对比发现，本文数值模拟可准确地预测燃料球的运动轨迹和碰撞次数，与实验结果相符。这表明本文方法可用于模拟高温堆燃料球的气动力提升过程。

Numerical Simulation of High Temperature Reactor Fuel Element Aerodynamic Lifting Process

In order to study the aerodynamic lifting process of high temperature gas-cooled reactor (HTR) fuel pebble, a method based on the numerical simulation of 3D computational fluid dynamics (CFD) and the decoupling of three-degree of freedom (3-DOF) dynamics simulation was used to simulate the movement of the fuel pebble. The aerodynamic force of the fuel pebble in the lifting tube was calculated by using CFD. The trajectory of the fuel pebble in the transfer tube was calculated by using 3-DOF dynamics simulation, and verified by experiment. The results show that the tra-jectory and number of collisions of the fuel pebble can be predicted accurately by numerical simulation described in this paper, and this approach can be used in the simulation of aerodynamic lifting process of HTR fuel pebble.