Comparative Study on the Aerodynamic Characteristics of Flame Stabilizer Employing Supersonic Jet and Subsonic Jet Based on Numerical Method

Abstract

Abstract To compare the aerodynamic characteristics of flame stabilizer by supersonic jet and flame stabilizer by subsonic jet, this article studies the size and length/width ratio of recirculation zone, size of jet trajectory at both supersonic and subsonic jet under the same geometry and boundary conditions in the ANSYS Fluent software program. The result shows that under supersonic jet the size, length/width ratio of recirculation zone and size of jet trajectory are bigger than under subsonic jet. Due to the size of recirculation zone is related to the burning range, that means using supersonic jet as a flame stabilizer can enlarge the stable burning range of a combustion chamber. It would make a big difference when the jet flame stabilizer apply to the gas turbine aircraft engine.