基于三维层析方法的受限空间内喷雾测量

Three-dimensional (3D) tomography is a new technology for measuring and evaluating in-cylinder diffusion and combustion by collecting the 2D projections of the signal to be measured on all orientations of the space then reconstructing its 3D spatial distribution using the tomography algorithm. In order to apply this method into confined-space, we establish the mapping relationship between the signal and the projections in confined-space by using reverse ray-tracing method and Snell’s refraction law, and develop a 3D cross-interface tomography algorithm. In this paper, the algorithm is used to reconstruct the vapor signal in the confined-space with continuous changes, and calculate the 3D surface curvature, velocity, and the coupling relationship between them.