Radical Emissions and Anomalous Reverse Flames Appearing in Upward-Increasing Magnetic Fields

Upward-increasing magnetic fields of lower intensities increased flame dimensions and liberations of carbons, and decreased radical emissions, temperatures and a bluing tendency of the flame. These phenomena were opposite to those occurring in the upward-decreasing magnetic fields. The upward-increasing magnetic fields of stronger intensities caused an anomalous inverse burning, where the positions of the blue and the yellow-orange regions are reversed, and the highest temperature of the flame appeared at flame surfaces distant from the flame top. The above phenomena are ascribable to the fact that the flame shapes and the flow directions of combustion products, air and the flame were changed due to the magnetic forces originating from magnetic gradient fields, thereby resulting in changes in the mixing and the diffusion conditions.