Measurement of Three-Dimensional Temperature Field of Flickering Premixed Flame with and without Coflow

摘要: The three-dimensional (3D) temperature field of the flickering flame with and without coflow can be measured using reaction technique combined tomographic reconstruction. This experimental facilitates non-intrusive measurement unsteady 3D a premixed methane/air flame. target visualization, which was achieved by sodium in supplied mists chloride solution line-of-sight intensity images flame, transformed into calibration D-line reversal method imaging from six CCD cameras located around uncertainty confirmed for steady axisymmetric under influence strong coflow. Tomographic measurements were applied to coflow, results analyzed proper orthogonal decomposition (POD) understand behavior energy found dominant first two POD modes. Flame non-axisymmetric modes, respectively. characteristics are discussed this paper, based on spectrum analysis. suggest that structure is highly modified presence even small magnitude