流化床锅炉燃烧室的流体动力学模拟

Hydrodynamic Simulation of Fluidized bed Boiler Furnaces

流化床的放大效应十分显著,使得流化床的试验研究在大型工业流化床设计中的应用发生问题。近年来在国外发展起来的流化床模拟放大技术是从流态化现象的基本控制方程出发,根据相似原理导出一组无量纲相似准则数。这些准则数建立了不同条件下(结构尺寸、温度、压力和床料特性等)的流化性能间相似的内在关系,对流化床的试验研究及设计实践有重要的指导意义及应用前景。

The significant amplification effect of a fluidized bed leads to some problems during the application of experimental study results of fluidized beds to the design of large-sized industrial fluidized beds.Based on the basic control equation of fluidization phenomenon, the fluidized bed simulation amplification techniques currently developed in some foreign countries have deduced a group of non-dimensional analog criteria functions by way of analog theory. These criteria functions have established the inner analog relationship between fluidization properties under various conditions (structural dimensions,temperature, pressure and bed medium characteristics,etc.)which may play a significang guiding role during the experimental study and design of fluidized beds and have created good prospects for practical applica tions.