| 定向结晶涡轮叶片蠕变/疲劳寿命的试验与分析 |
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| 引用本文： | 闫晓军,聂景旭.定向结晶涡轮叶片蠕变/疲劳寿命的试验与分析[J].航空动力学报,2005,20(6):925-931. |
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| 作者姓名： | 闫晓军 聂景旭 |
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| 作者单位： | 1.北京航空航天大学能源与动力工程学院,北京100083 |
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| 基金项目： | 航空科学基金资助(02C51031),全国优秀博士学位论文作者专项资金资助(200351) |
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| 摘 要： | 针对定向涡轮叶片的使用工况,提出了用于涡轮叶片蠕变/疲劳试验的方法,包括摩擦原理的夹具设计和标定及相关试验、计算和分析技术,并以某型定向涡轮叶片为例,介绍了该方法的实现。试验结果表明:试验方法能够模拟涡轮叶片考核截面在实际工作状态下的应力场和温度,利用所提出的试验方法和分析技术得到叶片的寿命数据是合理的。此次提出的基于构件的定向结晶涡轮叶片的蠕变/疲劳试验方法,对于涡轮叶片的定寿、故障预防、以及维修都有重要意义。
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| 关 键 词： | 航空、航天推进系统 涡轮叶片 定向结晶 蠕变/疲劳 试验技术 |
| 文章编号： | 1000-8055(2005)06-0925-07 |
| 收稿时间： | 2005/1/25 0:00:00 |
| 修稿时间： | 2005年1月25日 |
New Experimental Approach in Determining Creep/Fatigue Life of Directionally Solidified Alloy Turbine Blade |
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| YAN Xiao-jun and NIE Jing-xu.New Experimental Approach in Determining Creep/Fatigue Life of Directionally Solidified Alloy Turbine Blade[J].Journal of Aerospace Power,2005,20(6):925-931. |
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| Authors: | YAN Xiao-jun and NIE Jing-xu |
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| Institution: | 1.School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing100083,China2.School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing100083,China |
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| Abstract: | A new experimental method,in which the turbine blade was loaded by applying friction force and heated by eddy current induction,was proposed to study creep/fatigue life of directionally solidified alloy turbine blade.Design of the test devices,determination of blade's key section and the equivalent accelerated test loading-spectrum,test data analysis etc.was described in detail.Test results show that the method can simulate turbine blade key section's working "stress field" and temperature in the laboratory and give reasonable life data for turbine blade.The safe service life of aeroengine component determined by the component creep/fatigue tests will be more accurate than that obtained with the plain specimen. |
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| Keywords: | aerospace propulsion system turbine blade directionally solidified alloy creep/fatigue experimental technology |
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