瞬态三维温度场的莫尔偏折层析

本文讨论了莫尔偏折法层析三维温度场的原理;提出了一种多通道(多方向)莫尔偏折的方法来获得多方向光线经过温度场后偏折的数据,然后利用计算机层析再现三维温度扬的方法;并分析了最佳通道采样角间隔的选取问题,得到了角间隔与角频率之间的关系。采用YAG脉冲激光光源,测量了非对称火焰的三维空间温度分布,并与干涉法测量的结果比较,得到一致的结果。

Tomography of transient three-dimensional temperature field by moire deflectometry

The tomography principle of 3-D temperature field by moire deflectometry is discussed. A multipth moire deflectometry is presented which is used to obtain multi-direction deflectmetric data of a transient field and then to reconstruct the 3-D temperature distribution by computer tomography. The problem of sampling angle for asymmetric field is analyzied in theory, and the relation between angle interval and angle frequency is presented. In this paper a space 3-D temperature distribution of asymmetric flame is measured by using pulse YAG laser as source in this method, and the accuracy of measured result is consist with that obtained by interfcrometry.