碳纤维电热元件配置及其辐射热流密度分布的模拟研究

The simulation study of radiative heat flux intensity distribution with different assignments of carbon fiber electric heating elements

建立了多支碳纤维电热元件的辐射热流密度分布的数学模型,基于MATLAB软件求解并研究了不同元件排布及功率配置对其辐射热流分布性质的影响。结果表明,不同元件间距及辐射受热距离综合影响着辐射热流密度的均匀性,辐射均匀性随元件间距的增加而降低,随辐射距离的增加而提高。适宜的功率配置对优化辐射热流密度的均匀性具有积极作用。实验条件下,模拟表明,当元件间距s为15cm,辐射受热距离为12cm,功率配置为1000W-600W-1000W时,辐射热流密度基本呈"拱形"状分布。

A mathematical model for the radiative heat flux intensity distribution of many carbon fiber electric heating elements is set up and simulated with software MATLAB,and the influence of radiative heat flux distribution with different collocation and electric power is researched.The results show that the uniformity of radiative heat flux intensity is comprehensive affected by different elements＇ spacing and the radiative distance,the radiation uniformity reduces with the spacing of elements and improves with the radiative distance.The uniformity of radiative heat flux intensity can be advanced by proper assignments of electric powers.With the given experimental condition,the simulation results show that the arched radiative heat flux intensity field can be achieved when s=15cm,h=12cm and the assignment of powers is 1000W-600W-1000W.