蜂窝蓄热体温度特性数学解析

Mathematical analysis on the temperature performance of a honeycomb regenerator

基于蜂窝蓄热体气固传热精确解,研究蓄热体温度变化和切换周期设计方法,忽略沿气流流动方向的固体导热影响,建立了周期传热数学模型,并求出了气固温度分布精确解。和数值计算相比,半解析解可信,按炉内低氧稳定燃烧和蓄热体低温端不结露的要求,可进行切换周期优化设计,从而为低氧弥散燃烧设计和操控优化提供一种高效、经济、准确的解析研究方法。

The temperature change and switch-time design method were studied based on the exact solution of heat transfer between the gas and solid phase in a honeycomb regenerator. A periodical heat-transfer model was put forward with the neglect of heat conduction in solid along the gas flow direction, and the exact solution to the temperature profile of the gas and solid was achieved. Comparing with numerical simulations, the analytical solutions were believable. Under the conditions of steady low oxygen concentration combustion in furnace and no moisture condensation on the regenerator end of low-temperature, the optimization of switching period can be carried out. An analytical method for the optimization design, operation and control of dispersion combustion with lower oxygen concentration was provided.