基于哈特曼波前探测的流场层析测量技术结合了光学波前探测技术和计算机层析重建技术。系统由哈特曼传感器探测平行光束穿过流场后的投影波前,提取流场在多方向上的投影数据,采用计算机层析技术重建流场物理量的空间分布。为了验证系统的可行性和标定系统重建精度,首先对静态圆对称折射率场进行层析重建,折射率重建误差为10-3。在静态标定的基础上,对实际火焰温度场进行了层析重建,获得了火焰温度场的三维温度分布,取得了较好的实验结果。

A new method of tomography reconstruction from Hartmann wave-front sensing is presented which combines wave-front sensing technique with computed tomography reconstruction technique.The projection wavefront of parallel light passed through a flow field is measured by Hartman wavefront sensor, from which the projections of flow field are obtained.The distribution of physical parameter of field is reconstructed by tomographic reconstruction technique. To validate the feasibility and accuracy of system, the tomographic reconstruction of circularly symmetric refractive index field is conducted firstly and a good reconstruction result is obtained with 10-3 error. Based on the static calibration experiment, tomographic reconstruction of a fire field is conducted and 3-D temperature distribution is gained and a good reconstruction result is obtained.