A202 時系列噴流拡散火炎画像の輝度変動の可視化

抄録

Free jet diffusion flame photographs were taken by high-speed video camera. Propane was used as fuel. Flame images are digitized into 24-bit full color images by using commercial software. The digital color image is decomposed into 8-bit images of the Red, Green and Blue components and moreover each component is converted into decimal ASCII data by means of our program. In this study, the Red component luminosity fluctuation is investigated for five different fuel exit velocities. The ASCII data of 3000 frames are stored into Microsoft Excel and the time-averaged value and fluctuation intensity of luminosity are calculated by our program based on the Visual Basic Applications Edition (VBA) in Excel. These results are recomposed into 8-bit BMP images and visualized as the density slicing pseudo color images.