基于三维层析方法的受限空间内喷雾测量
Measurements of Vapor in Confined-space Based on 3D Computed Tomography
凌晨 1陈海岩 1伍岳1
作者信息
- 1. 北京理工大学机械与车辆学院,北京 100081
- 折叠
摘要
三维层析方法通过相机采集待测信号在空间各方向上的二维投影,利用层析算法重构其三维空间分布,具有时空分辨能力,是测量和评估发动机缸内扩散和燃烧的新兴技术.为了使该方法能适用于受限空间,我们通过光线逆向追踪法和斯涅尔折射定律建立受限空间内待测信号和投影之间的映射关系,开发了三维跨界面层析算法.本文使用该算法对连续变化的受限空间内喷雾信号进行了重构实验,并计算出了喷雾表面曲率、速度以及其间的耦合关系.
Abstract
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.
关键词
层析/扭曲修正/三维曲率/表面速度Key words
tomography/distortion correction/3D curvature/surface velocity引用本文复制引用
基金项目
国家自然科学基金资助项目(51906017)
出版年
2024
NETL
NSTL
维普
万方数据