自动铺放红外热源方程的建立与试验验证

为了指导自动铺放红外热源的设计，分析红外热源灯罩间接辐射和灯管直接辐射的热流分布.通过引入角系数密度，考虑红外灯长度与安装高度、灯罩各面宽度与角度及灯管辐射功率与安装位置等设计参数，建立参数化的热源方程.采用有限元和试验相结合的方法，分析红外灯动态和静态加热过程，所测定被加热表面的温度仿真结果与试验结果吻合良好，验证了该红外热源方程的有效性.利用该热源方程，研究红外灯参数对辐射热流的影响.结果表明，当红外灯顶面高度从0.10 m降低到0.06 m时，有效辐射强度升高1.5倍，均匀度降低31.08%；将灯罩侧面角度设计为60°~75°，适当减小灯罩顶面宽度，可以提高红外灯的有效辐射强度和均匀度.
Abstract: A parameterized heat source equation was established based on the analysis of heat flux distribution from infrared lampshades indirectly and tubes directly in order to guide the design of infrared source in automated placement. The design parameters of infrared lamp such as installation height, length, width and angle of the lampshades, radiation power and position of the tubes were considered by introducing the density of view factor. The process of dynamic and static infrared heating was analyzed by combining finite element simulation and test. The simulation results of temperature on heated surface accorded well with the test results. The heat source equation was verified. The influence of the design parameters of infrared lamp on its heat flux distribution was analyzed. The effective radiation strength increased 1.5 times and the effective radiation uniformity dropped by 31.08% as the installation height of infrared lamp was reduced from 0.10 m to 0.06 m. A growth in effective radiation strength and uniformity could be reached when designing the angles of side lampshades in the range of 60~75 degrees or shortening the width of top lampshade.