湿度对HAT循环燃烧室旋流扩散燃烧特性的影响

为研究湿度对燃烧特性的影响，采用湍流雷诺应力模型和层流小火焰模型，对湿空气透平(HAT)循环燃气轮机带有旋流器的燃烧室内甲烷扩散燃烧过程进行了数值模拟对比了在4种不同空气含湿量(0、100、200、300g／kg(DA))情况下的燃烧室内部温度场、速度场以及NO组分分布的情况，分析了湿度对HAT循环燃烧室扩散燃烧特性的影响结果表明，加湿降低了整个燃烧室的温度，并使其内部温度分布更加均匀；加湿使燃烧室的NO浓度大大降低；加湿减小了回流区长度。

The Influence of Humidity on the Swirl Diffusion-combustion Characteristics in a Humid Air turbine (HAT) Cycle Combustor

A turbulent Reynolds stress model and a laminar small flame model are used to study the influence of humidity on combustion characteristics. A numerical simulation was conducted of a methane diffusion-combustion process in the swirler-equipped combustor of a humid air turbine (HAT) cycle gas turbine. The distribution states of temperature profile, velocity field and NO constituent elements in the combustor are compared for four different air humidity values (0, 100, 200, 300 g/kg DA]) along with an analysis of the influence of humidity on diffusion combustion characteristics in the HAT cycle combustor. It has been found that moisture addition can lead to a reduction in combustor temperature, a more uniform distribution of temperature and a drastic lowering of NO concentration in the combustor as well as a reduction in the length of a return flow zone.