Experimental Analysis of Double-Wall Impingement-Effusion Cooled Combustor Liners

双壁冲击喷射冷却燃烧室衬套的实验分析

• 批准号: 517489232
• 负责人: Professor Dr.-Ing. Hans-Jörg Bauer
• 金额: --
• 依托单位: Institut für Thermische Strömungsmaschinen (ITS)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/517489232?language=en
• 关键词: Experimental; Analysis; Double; Wall; Impingement

Stationary gas turbines and aero engines continue to be a key technology for the energy and transport sector of the future. Especially in commercial aerospace, gas turbines will be the only feasible solution for propulsion in the feature, even when considering semi-electric propulsion systems. To further increase the thermal efficiency core engine pressure ratios and turbine inlet temperatures have to be increased. Additionally, new combustion concepts have to be developed. Combustor components, especially the liners, are under increasingly high thermal loads. They have to be cooled using the least amount of air possible, since this air directly reduces thermal efficiency and influences the combustion itself. In the scope of this project innovative cooling concepts will be analyzed experimentally. These new concepts are based on a double-wall concept, where the outer wall is used to generate impinging jet on the inner, hot wall cooling it from the back side. Eventually, the air is expelled through effusion holes in the inner wall generating a protective film on the hot side. A validated test rig will be used to provide new thermal and aerodynamic test data. Thermal data will be acquired using infrared thermography, aerodynamic data will be acquired using Particle Image Velocimetry. The data will be evaluated stationary and also time-resolved where applicable. The results can be used to provide new models and correlations for the design and evaluation of new combustors based on double-wall cooling.

固定式燃气轮机和航空发动机仍然是未来能源和运输部门的一项关键技术。特别是在商业航空领域，燃气轮机将是该功能中唯一可行的推进解决方案，即使考虑到半电推进系统也是如此。为了进一步提高热效率，必须提高核心发动机压比和涡轮进口温度。此外，还必须开发新的燃烧概念。燃烧室部件，特别是衬里，承受着越来越高的热负荷。它们必须使用尽可能少的空气来冷却，因为这种空气直接降低热效率并影响燃烧本身。在本项目的范围内，将对创新的冷却概念进行实验分析。这些新概念是基于双壁概念，其中外壁被用来在内部产生撞击射流，热壁从背面冷却它。最后，空气通过内壁上的渗孔排出，在热面上形成一层保护膜。将使用经过验证的试验台来提供新的热力和空气动力测试数据。热数据将使用红外热像仪获取，气动数据将使用粒子图像测速仪获取。将对数据进行静态评估，并在适用的情况下进行时间解析。研究结果可为基于双壁冷却的新型燃烧室的设计和评价提供新的模型和关联式。