一个高温发动机材料测试设施
Prabha H Shelton1, Haydn N G Wadley1,2
1Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
The Review of scientific instruments
|April 26, 2024
概括
一个新的测试设施模拟了极端的燃气轮机发动机条件,使得在热应力和反应性气体流下研究高温材料和涂层成为可能. 这项研究对于开发用于未来发动机应用的先进材料至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 航空航天工程 航空航天工程
背景情况:
- 燃气轮机发动机在极端条件下运行,需要先进的材料和涂层来承受高温 (接近1800°C),热梯度,冲击和应力.
- 当前材料在长时间暴露在反应性,高压,高速燃烧气体流中时面临着生存的挑战.
研究的目的:
- 设计和开发一种能够模拟燃气轮机发动机恶劣运行环境的新型试验设施.
- 为了使在单个和组合的极端测试参数下研究材料和涂层性能.
主要方法:
- 在环境室 (0.1-1.2 MPa) 中集成液压负载框架 (高达400 MPa).
- 使用二氧化碳激光器 (0.1-2千瓦) 快速加热表面至1800°C以上,以及用于热梯度的空气喷射冷却.
- 模拟反应性气体流量 (高达1.3 MPa,850°C,300 m/s) 与受控的湿度.
- 采用热成像热量计和数字图像相关性用于温度和应变映射.
主要成果:
- 该设施成功地复制了关键的极端条件,包括高温,热冲击和机械应力.
- 它允许在模拟的操作环境下精确控制和测量材料反应.
- 具有诱导和监测热冲击和机械疲劳的能力.
结论:
- 开发的测试设施是评估用于燃气轮机应用的高温材料和涂层的宝贵工具.
- 它为了解在现实的发动机条件下材料降解机制提供了一个平台.
- 这项研究有助于推进下一代燃气轮机的材料科学.
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