靶场编组站镜箱温度场稳定性影响及优化分析

Stability Impact and Optimization Analysis of Temperature Field of Switchyard Mirror Box in ICF Target Area

激光惯性约束聚变(ICF)装置中靶场编组站镜箱内的温度控制是实现光学元件最小变形,保证光束质量的重要环节。建立靶场编组站镜箱数学和物理模型,采用流体动力学分析软件对靶场编组站镜箱内温度场分布进行了数值模拟,计算结果与实测结果吻合。分析了不同鼓风速度v及鼓风角度θ对镜箱内温度场分布的影响及稳定时间,结果表明鼓风速度越大,镜箱内温度场趋于稳定越快,而风速v大于1.3m/s后,稳定时间的减小不明显;鼓风角度对镜箱内温度场稳定影响较大,有最佳值。当鼓风速度v为1.3m/s,鼓风角度θ为20°时镜箱内温度场稳定时间最短,为77min。且在鼓风机关闭后32min内,镜片温差在允许范围内,最大值为0.009K。

In order to achieve minimum deformation of optical components and ensure beam quality, temperature control of switchyard mirror box in target area of the laser inertial confinement fusion （ICF） devices is very important. Mathematical and physical models of switchyard box in target area are established. FLUENT software is used to analyze the temperature field inside mirror box and analysis result is consistent with the measured result. The temperature field distribution and stability time inside mirror box impacted by different wind velocities and angles are analyzed, the results show that the greater the speed, the faster the temperature field inside mirror box stabilized. And when wind velocity v is greater than 1.3 m/s, the decrease of stability time is not obvious. Wind angle shows great impact on the steady of temperature inside mirror box and the best value is obtained. When wind velocity v is 1.3 m/s and wind angle θ is 20°, the stability time inside mirror box is the shortest with the value of 77 min. And within 32 rain after the blower turned off, the temperature difference between the mirror is in the allowable range, with a maximum of 0. 009 K.