高压涡轮叶尖径向运行间隙概率设计

费成巍; 白广忱; 赵合阳; 韩彦彬

高压涡轮叶尖径向运行间隙概率设计

北京航空航天大学能源与动力工程学院, 北京 100191

基金项目: 国家自然科学基金资助项目(51175017,51275024);高等学校博士学科点专项科研基金资助课题;北京航空航天大学博士生创新基金资助项目(YWF-12-RBYJ-008)

详细信息

作者简介:
费成巍(1983-),男,河南开封人,博士生,Feicw544@163.com.

中图分类号: V231.95
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- 文章访问数: 1904
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- 被引次数: 0
出版历程
- 收稿日期: 2012-02-21
- 网络出版日期: 2013-03-31

Probabilistic design for blade-tip radial running clearance of HPT

School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 为了改善高压涡轮叶尖径向运行间隙(BTRRC,Blade-Tip Radial Running Clearance)设计和控制合理性,考虑典型载荷下的热载荷和机械载荷和合理选取随机变量,在确定性分析基础上对BTRRC进行了概率设计.通过确定性分析,得出涡轮盘、叶片和机匣的径向变形以及BTRRC随时间变化规律,并找出危险点(t=180 s)作为概率设计的计算点.通过概率分析,不但得到了各部件径向变形的概率分布特征及不同稳态叶尖间隙δ下的失效数、失效概率和可靠度,还找到了影响它们径向变形和BTRRC的主要因素.综合考虑航空发动机可靠性和效率,将δ设定为1.95 mm为宜,满足设计和工程要求,为BTRRC的控制和设计提供了依据.
- 航空发动机 /
- 高压涡轮 /
- 叶尖径向运行间隙 /
- 概率设计 /
- 灵敏度分析 /
- 响应面法
Abstract: To improve the blade-tip radial running clearance(BTRRC) design of aeroengine high pressure turbine(HPT), the probabilistic analysis of BTRRC was implemented based on deterministic analysis through considering the heat and mechanical loads of objects (disk, blade and casing) and selecting random variables legitimately. The variation of BTRRC and the radial deformations of objects with time were gained and the minimum clearance at t=180 s was regarded as the probabilistic analysis point through the deterministic analysis. In addition, the probabilistic distribution features and failure numbers, failure probabilities and reliabilities under different static clearance δ predetermined were obtained besides the major factors impacting on the deformations and BTRRC through the probabilistic analyses. The results show that δ=1.95 mm is advisable to select as an effective reference for the control and design of BTRRC for satisfying the aeroengine design and engineering.
- aeroengine /
- high pressure turbine(HPT) /
- blade-tip radial running clearance (BTRRC) /
- probabilistic design /
- sensitivity analysis /
- response surface method(RSM)

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参考文献(1)

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