辐射换热对冷冻靶温度影响的数值分析  

Numerical analysis of radiation heat transfer effects on cryogenic target temperature

作　　者：殷阁媛 厉彦忠[1] 郑江[1] 陈鹏玮[1] 罗怀桦 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《强激光与粒子束》2015年第6期150-156,共7页High Power Laser and Particle Beams

基　　金：国家重大课题专项

摘　　要：为了研究辐射换热对惯性约束聚变间接驱动靶系统的温度场影响,建立了带有辐射屏蔽罩的冷冻靶系统数值计算模型,利用FLUENT软件的离散坐标辐射模型分析了系统的辐射换热,并对影响辐射换热的相关结构和参数进行了模拟优化。结果表明:采用双层屏蔽罩、减小屏蔽罩的发射率、增大屏蔽罩的散射分数和金腔的吸收率、增设暴风窗,均可有效减小靶丸与外界的辐射换热,从而改善靶丸表面的温度均匀性。To investigate the influence of the radiation heat transfer on cryogenic target system, a computational fluid dy- namics model for cryogenic target with a radiation shield is established. The modeling is implemented with FLUENT software, and the discrete ordinates model is adopted for calculating radiation heat transfer. The structure and parameters participating in radiation heat transfer are analyzed. The results show that the following measures help to reduce the radiation heat transfer and improve the temperature unity around the target： using double radiation shield, decreasing the emissivity of the radiation shield, increasing the diffusion fraction of the radiation shield, increasin the absorntivitv of the hohlraum, and adding storm windows.

关 键 词：冷冻靶 辐射换热 辐射屏蔽罩 暴风窗 

分 类 号：O411.3[理学—理论物理] O351.2[理学—物理]