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对内通道中的热晕效应问题,完整求解流场与光场的能量耦合方程是一个非常有意义而又亟待解决的研究课题。借助流体力学模拟软件Fluent,通过解耦求解光传输方程和流体力学方程的方法,建立了较为完整的流场与光场耦合相互作用仿真平台。编写用户自定义函数,完成初始流场参数的读取,并进行光传输计算;将计算得到的光能以能量源项的形式添加到流场能量方程中去;借助现有的流场分析软件Fluent,对流场方程进行求解,并转入下一时间步的计算。对横截面为圆形的直管道结构,理论近似计算得到的结果与数值仿真平台计算得到的结果基本一致。
For the thermal halo effect in the inner channel, it is a very significant and urgent research topic to completely solve the energy coupling equation between the flow field and the optical field. By means of the fluid dynamics simulation software Fluent, a complete simulation platform for the interaction between flow field and light field was established by decoupling the light transmission equation and the fluid dynamics equation. Write a user-defined function to read the initial flow field parameters and perform optical transmission calculation; add the calculated optical energy to the energy equation of the flow field in the form of energy source terms; and with the aid of the existing flow field analysis software Fluent, to solve the flow field equation, and transferred to the next time step calculation. For a straight pipe structure with a circular cross section, the approximate theoretical calculation results are basically the same as those obtained by the numerical simulation platform.