燃气轮机合成气双旋流非预混燃烧室的设计及实验测试

Design & Test of a Syngas Double-Swirled Non-Premixed Combustor in Gas Turbine

本文针对上海交通大学25 kW燃气轮机性能试验台的合成气燃烧室开展了设计研究,完成了燃烧室样机的加工与实验测试。研究过程中,首先对合成气燃烧室开展了结构设计;采用双旋流结构的燃烧器进行合成气燃烧火焰组织;采用了燃烧室头部贫燃方式(低当量比)设计以保证燃烧室低排放特性;利用双层壁冷却方式进行火焰筒壁面冷却。在燃烧室结构设计的基础上,利用数值方法系统分析了合成气双旋流非预混燃烧室工作特性,完成了合成气非预混母型燃烧室的设计优化。根据优化方案,完成了燃烧室样机的加工、安装,并进行了实验性能测试。实验结果表明实验工况该燃烧室燃烧稳定,NO_x排放小于25 mg/m^3@15%O_2。

A syngas prototype combustor for 25 kW gas turbine was developed and preliminary tested in Shanghai Jiaotong University.Structure design for the combustor is presented firstly in this paper.A double-swirled burner is used in the combustor.Lean combustion(low equivalence ratio)mode for the head of combustor is chosen to ensure low emission characteristics.And double wall cooling method is adopted in flame tube structure design.On the base of combustor structure design,several modification schemes of the syngas double-swirled combustor are discussed with numerical simulation methods.And one of them has been chosen for full-scale tests.The tests show good result in the combustion stability and NO_x emission.The NO_x emission of the combustor is lower than 25mg/m^3@15%O_2 in the test condition.