Numerical Simulation Study for the Influence that Steady Flame Device´s Location has on the Burning in the Supercharged Boiler

Supercharged boiler is widely used in large ships as a main power plant because of its small size and weight, high thermal efficiency and volumetric heat load. Based on the fluent software, this paper uses k-ε turbulence model and the simplified PDF model to simulate different locations of Steady flame device. Through analyzing the variation tendency of recirculation zone, the flame length, the maximum temperature and the position, the incomplete combustion product of furnace outlet and the average flame temperature with the trend of device location. We can get that the location of Steady flame changes have a significant impact on flame temperature, flame length and the full extent of burning; cold recirculation zone size variation of the combustion conditions and changes of different recirculation zone; when the device´s position is in the 139mm, the recirculation zone will have a good size, the flame length will be small and the level of combustion will be well. The results provide a reference for the design and running of supercharger boiler.