Study On Reconstruction Method Of Three-dimensional Hyperspectral Field And Temperature Field

Combustion reactions are widespread in daily life,as well as in industrialization processes such as thermal power generation,metal smelting,and aerospace.The flame is the "visible form" of the combustion reaction.The study of the flame temperature field can not only be used to explore the evolution of the combustion reaction and explain the essential characteristics of combustion phenomenon,but also provide an important scientific basis for energy conservation and environmental protection.Nowadays,most mature temperature field measurement methods are two-dimensional.The three-dimensional temperature field reconstruction method proposed by the researchers adopts the construction of a complex large-scale system and tedious calculation steps to achieve the reconstruction of the three-dimensional temperature field of a specific flame.Most of them have problems such as low accuracy,poor timeliness and strong device dependency,and it is difficult to achieve a more accurate three-dimensional temperature field acquisition.This article focuses on how to achieve fast and accurate flame 3D temperature field reconstruction.The main work and innovations are as follows:1.This paper proposes a three-dimensional hyperspectral field reconstruction algorithm.This algorithm has fast reconstruction speed and high accuracy.Using the hyperspectral data obtained by the nine-view spectroscopic video camera system,the dynamic three-dimensional hyperspectral field(12fps)of the ethylene diffusion flame is realized,and the reconstructed hyperspectral field resolution is accurately reconstructed.Its resolution is 100*100*500.Its accuracy is higher than 2mm/pix,and its error is as low as 0.15%.2.This paper proposes a new three-dimensional temperature field reconstruction method.This method combines the three-dimensional hyperspectral field reconstruction algorithm and the multi-wavelength emission spectroscopy method,which can reconstruct the three-dimensional temperature field with high precision(0.1mm/pix)and high accuracy(with an error of less than 1.4%).And through experiments,the reconstruction of the three-dimensional temperature field of the ethylene diffusion flame and the three-dimensional temperature field of the ethylene premixed flame was realized.