三维非等温多孔层的红外测温误差分析

发布时间：2018-03-17 13:19

  本文选题：探测器　切入点：辐射　出处：《光学学报》2017年05期 　论文类型：期刊论文

【摘要】：以太阳能多孔吸热器等热利用系统为研究背景,针对多孔层表面的红外测温问题,基于反向蒙特卡罗法建立了三维非等温各向异性散射多孔层的红外测温模型,讨论了散射类型、多孔层厚度、基材发射率、孔隙率、孔径等物理性质和结构参数对红外测温误差的影响,提出了一种多孔层表面温度的反向计算方法。结果表明,将红外温度的实验测量值视作多孔表面温度会导致一定误差;后向散射可削弱高温背景辐射,从而减小探测温度较高时的误差,但增大了探测温度较低时的误差;高孔隙率(大于0.93)会造成测温误差迅速增大;测温误差小于2%时的参数范围如下:多孔层厚度为14~27mm,基材发射率为0.33~0.81,孔隙率为0.86~0.93,孔径为1.5~2.8mm。
[Abstract]:In view of the infrared temperature measurement problem of porous layer surface, a three-dimensional infrared temperature measurement model of non-isothermal anisotropic porous layer is established based on the inverse Monte Carlo method. The effects of physical properties and structure parameters, such as scattering type, thickness of porous layer, emissivity of substrate, porosity and pore size, on infrared temperature measurement error are discussed. A reverse calculation method for surface temperature of porous layer is proposed. Considering the measured value of infrared temperature as the temperature of porous surface, the backscattering can weaken the background radiation of high temperature, thus reduce the error when the detection temperature is high, but increase the error when the detection temperature is low. High porosity (> 0.93) results in a rapid increase in the temperature measurement error, and the parameters when the temperature error is less than 2 are as follows: the thickness of the porous layer is 147mm, the emissivity of the substrate is 0.330.81, the porosity of the substrate is 0.860.93, and the pore size is 1.5 ~ 2.8mm.
【作者单位】： 哈尔滨工业大学能源科学与工程学院;
【基金】：国家自然科学基金重点项目(51536001)、基础科研项目(B2320132001)
【分类号】：TN219
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本文编号：1624911