Virtual Demonstration Study Of Circulating Fluidized Bed Combustor

High efficiency with low pollution is the trend of coal-fired power generation. The circulating Fluidized Bed Combustor (CFBC) is a widely-used clean coal combustion technology. It can diminish the emission of SO2 and NOx released from coal combustion.There are many characteristics about CFBC which are still unknown to us, therefore CFBC need be further studied. A new method called virtual demonstration is used to study the CFBC performance based on the numerical simulation results in this paper. By virtual reality technique, the gas-solid two phase flow and temperature field in CFBC can be demonstrated. The method can be used as supplement to the experimental study for saving time and investment and provide more visible analysis of numerical calculation results.In this thesis, a general method for modeling and demonstrating CFBC is present. Because of the CFBC complexity,the two phase fluid models, Eulerian models, are set up. The control volume method and PC-SIMPLE algorithm are applied to calculate the velocity, voidage and temperature fields. Then, the models of fire, solid particle movement and bubble movement are set up based on numerical calculation results, particle system and physically theory.Based on OpenGL and Intra3D, a virtual demonstration platform is developed. Virtual demonstration models of fire, solid particle movement and bubble movement are present using computer graphic technology. The fire, particle and bubble movement are demonstrated. Using VC++6.0 development platform, a software for virtual demonstration of solid particle movement, fire and bubble movement is developed, and can be used as the virtual environment of CFBC. The virtual demonstration of CFBC provides exploration and visualization of CFBC characteristic.