几何结构影响高温空气燃烧特性的数值分析

通过改变燃料喷口周围空气喷口分布夹角，采用数值计算的方法研究了高温空气燃烧特性的变化，包括燃烧温度场、速度场和NOx的生成和出口排放情况。模拟结果说明，减小空气分布夹角可以降低燃烧区最高温度和平均温度，扩大燃烧室内低氧范围，有效抑制热力型NOx的生成和排放。所采用的计算模型和计算方法可以较好地模拟高温空气燃烧过程，计算结果可信。

Numerical Analysis of High Temperature Air Combustion with Different Geometric Structure

By changing the angle between the central lines of air nozzles and fuel nozzle of the combustion facility, the variety of characteristics of high temperature combustion, including temperature field, velocity field, NOx formation and concentration of NOx at the outlet are gained using numerical simulation. The results indicate that by reducing the angle, the maximum temperature and average temperature in the combustion area can be reduced. It can also make the low O2 area enlarged and efficiently suppress the formation and emission of NOx. The numerical model and method can simulate well high temperature air combustion process, and the calculated results are convinced.