The diagnostic study of optical tomography for high-temperature flow fields in the open system

In this paper, the application of moiré and emission tomography in diagnosing the high-temperature and illuminant flow field in the open system is studied, and two flames with different spatial size are chosen as typical objects. First of all, the moiré fringes and the corresponding measured two flames are obtained by integrating moiré and emission tomography. After that, the distribution and the brightness of the moiré fringes are compared for the two flame flow fields, as well as the distributions of the refractive index and the components. Then, the temperature distributions of the two flames are compared and analyzed. The results show that, when moiré and emission tomography are applied in diagnosing the high-temperature and illuminant flow field in the open system, the size, the structure and the species components of the measured flow fields have important effect on the final temperature results. Consequently, the specific problem should be specifically analyzed for the optical diagnosis of flow fields.