颗粒附壁燃烧机理及模拟方法探讨

在燃用固体燃料，如生物质、煤、固体废弃物时，都存在一定程度的附壁燃烧现象，以燃煤液排渣燃烧器为例，探讨了颗粒在熔融面上的沉积、流动以及燃烧机理。并针对现有煤粉燃烧程序在液排渣燃烧器模拟上的局限，开发了一种考虑液渣流动的附壁燃烧模型，给出了总体的计算框架．通过对不同壁面处理方式下计算结果的比较，分析了不同手法的优劣和特点，为液排渣燃烧器的正确模拟提供一种完整的思路，对生物质或固体废弃物燃烧模拟起到一定的参考作用。

Study on the mechanism and simulation method for wall burning process

While burning solid fuels, like biomass, coal arid waste, wall-burning will occur to a certain extent. With the coal-fired liquid-bath combustor as an example, the mechanism of coal deposition, movement and combustion on the molten surface are discussed. In order to overcome the limitation of existing simulation methods for burning characteristics in the liquid-bath combustor, this paper proposes a wall-burning model considering the slag flow condition and gives a total computational frame work. From the comparison of simulation results with several other methods, their difference and properties are analyzed, which can provide a guidance for the simulation of liquid-bath combustor and for the simulation of biomass or waste combustion.