QD128燃气轮机涡流器组件与喷嘴磨损、烧蚀及积炭问题研究

本文对QD128燃气轮机涡流器组件与喷嘴磨损、烧蚀及积炭问题进行研究分析,从零件材料、结构尺寸到材料表面处理入手,提出解决故障的方法,通过将浮动环材料改为线胀系数更小的GH907,缩短轴向尺寸、增加抑制旋转结构及耐磨涂层来解决磨损问题,通过将喷嘴头部表面材料改性处理、周向开槽以及端面前移2 mm的方法来解决积炭问题,并且利用数值仿真,在75%和100%负荷下,对比原始结构及改进结构对火焰筒头部及燃烧室性能参数的影响,验证改进方法的可行性。

Research on Wear, Ablation and Carbon Deposition of Eddy Current Components and Nozzles of QD128 Gas Turbine

In this paper, the wear, ablation and carbon deposit of QD128 gas turbine swirler assembly and nozzle are studied and analyzed. Starting from the material and structural dimensions of the parts and the surface treatment of the materials, the method to solve the failure is proposed. The wear problem is solved by changing the floating ring material to GH907 with smaller linear expansion coefficient, shortening the axial dimension, adding anti-rotation structure and wear-resistant coating. The carbon deposit problem is solved by modifying the surface material of the nozzle head, grooving circumferentially and advancing the end face by 2mm. The feasibility of the improved method is verified by comparing the influence of the original structure and the improved structure on the flame tube head and combustion chamber performance parameters through numerical simulation at 75% and 100% load.