运用激光层析观测预混火焰前锋

Observing Premixed Flame Front by Laser Tomographic

介绍了用激光层析探测燃烧场的原理及其装置和图像处理工具的开发过程.利用预混V形火焰进行了激光层析探测火焰前锋的实验,结果显示,该方法能够在入射光平面内清晰地分辨火焰皱褶在任一瞬间的几何形状.利用主动轮廓算法从数字化图像中准确提取了火焰前锋的轮廓线形,为火焰皱褶及其传播特性的量化分析打下了基础.

The principle of combustion field detection by using laser tomography is described, as well as the exploitation of laser tomngraphy apparatus and the tool of image processing were introduced. The experiment of detecting flame fronts by laser tomography was made by employing a V-shaped premixed flame. The results show that the instantaneous geometry shape of flame wrinkles within the light sheet can be clearly differentiated. The contours of the flame fronts are precisely tracked through active contour method （ACM） from the digitized images of laser tomography, providing the basis for the quantitative analysis of flame wrinkles and their propagations.