[1]刘梅军,董宇,杨冠军.航空发动机叶片/机匣碰摩热致变形与应力研究[J].中国材料进展,2022,41(04):296-703.[doi:10.7502/j.issn.1674-3962202008015]
 LIU Meijun,DONG Yu,YANG Guanjun.Research on Thermal Deformation and Stress of Aero-Engine Blade/Casing Rubbing[J].MATERIALS CHINA,2022,41(04):296-703.[doi:10.7502/j.issn.1674-3962202008015]
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航空发动机叶片/机匣碰摩热致变形与应力研究()
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中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

卷:
41
期数:
2022年第04期
页码:
296-703
栏目:
出版日期:
2022-04-30

文章信息/Info

Title:
Research on Thermal Deformation and Stress of Aero-Engine Blade/Casing Rubbing
文章编号:
1674-3962(2022)04-0296-08
作者:
刘梅军董宇杨冠军
(西安交通大学材料科学与工程学院 金属材料强度国家重点实验室,陕西 西安 710049)
Author(s):
LIU Meijun DONG Yu YANG Guanjun
(State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China)
关键词:
热致变形热致应力叶片机匣碰摩
Keywords:
thermally induced deformation thermally induced stress blade casing rubbing
分类号:
V232.4;V232.6
DOI:
10.7502/j.issn.1674-3962202008015
文献标志码:
A
摘要:
为分析航空发动机叶片/机匣碰摩热致变形与应力,基于有限元方法建立了叶片/机匣碰摩模型,研究多次碰摩下叶片/机匣的应力、形变、温度特征,并对碰摩热致变形的主导因素进行探究分析。研究发现,叶尖与机匣的碰摩会引起接触界面摩擦升温,不仅会改变界面温度状态,还将通过热变形引发叶片/机匣产生附加的热应变和热应力:界面摩擦热在改变温度的同时还会引发机匣和叶片的热膨胀应变,叶片受热后呈现伸长的趋势,机匣受热呈现局部向上拱起的趋势;在叶片旋转一周后,总体上机匣呈现朝向叶片拱起的趋势,而由于机匣向内拱起,导致叶尖变形不但没有伸长,反而受机匣挤压而缩短,同时在宽度方向上膨胀。叶片和机匣碰摩受热后的叠加作用结果是在叶尖与机匣间产生附加压应力,同时热致应变应力的产生主要源自于机匣摩擦热,因此,机匣摩擦热是引发纵向位移、纵向应力的主要来源。
Abstract:
To analyze the blade/casing rubbing-friction process of aero-engine, a blade/casing rubbing-friction model is established based on the finite element method. The stress,deformation,temperature characteristics of blade/casing under multiple rubbing are studied, and the dominant factors of thermal deformation caused by rubbing are explored and analyzed. The rubbing-impact between blade tip and casing of aero-engine will increase the temperature of the contact interface friction, which will not only change the interface temperature state, but also cause additional thermal strain and thermal stress of blade/casing through thermal deformation. Interfacial frictional heat changes the temperature and also induces thermal expansion strain of the casing and blades. The blades show an elongation trend and the casing show a partial upward arching trend after being heated. After the blades have rotated once, the casing generally shows a tendency to arch toward the blades. However, the deformation of the blade tip due to the inward arching of the casing not only does not extend, but is compressed and shortened by the casing, and expands in the width direction at the same time. The superimposed effect of the casing and blades after being rubbed and heated results in additional compressive stress between the blade tip and the casing. At the same time, the cause of thermally induced strain stress mainly comes from the effect of friction heat in the casing. Therefore, the friction heat of the casing is the main source of longitudinal displacement and longitudinal stress.

备注/Memo

备注/Memo:
收稿日期:2020-08-24修回日期:2020-09-10 基金项目:国家科技重大专项(2017VII00120107) 第一作者:刘梅军,男,1987年生,副教授,博士生导师, Email:liumjun@mail.xjtu.edu.cn 通讯作者:杨冠军,男,1977年生,教授,博士生导师, Email:ygj@mail.xjtu.edu.cn
更新日期/Last Update: 2022-05-12