航空发动机

张根1 ，李飞2 ，吴文青 3 ，陈玉龙 1.一体化燃烧室机匣静强度试验[J].航空发动机,2025,51(6):108-114

一体化燃烧室机匣静强度试验

Static Strength Test of Integrated Combustion Chamber Casing

DOI：

中文关键词: 一体化燃烧室机匣密封性试验静强度试验 Ti 2 AlNb 航空发动机

英文关键词:integrated combustion chamber casing sealing test static strength test Ti2AlNb aeroengine

基金项目:国家级研究项目、国家自然科学基金青年项目（52505147）资助

作者	单位
张根1 ，李飞2 ，吴文青 3 ，陈玉龙 1	1.中国航发四川燃气涡轮研究院，成都 610500； 2.哈尔滨工业大学能源科学与工程学院，哈尔滨 150001； 3.清洁高效透平动力装备全国重点实验室，西安 710072

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中文摘要:

为了保证航空发动机服役可靠性，对发动机Ti 2 AlNb一体化燃烧室机匣开展静强度试验。设计了完整夹具、密封装置和应力应变等测试设备，获取机匣破坏临界压力，并采用有限元计算软件进行应力应变仿真以验证静强度试验方法的有效性。结果表明：设计的夹具强度满足一体化燃烧室机匣试验要求，且通过位移、应变测量敏感位置测得的90°方向测点的应变值明显高于0° 和45°方向测点的，破坏表面应力主要受90°方向上主应力作用；在0.5 MPa密封性加载试验中，不同应变位置的相同应变测点变化曲线大致重合，保载阶段应变能在有效范围内保持不变；在设定工况载荷下，机匣部件在12 MPa时出现破坏，在15.2 MPa时完全破裂失效，试验件结构最大应变为-3779 με，最大位移为4.07 mm，失效位置与仿真结果大致吻合，证明了搭建的测试平台和分析方法能保证完整的机匣静强度试验有效开展。

英文摘要:

To ensure the service reliability of aeroengines, the static strength test was carried out on a Ti2AlNb integrated combustion chamber casing. A complete set of fixtures, sealing devices, and stress-strain testing equipment was designed to obtain the critical failure pressure of the casing. Finite element analysis software was used for stress-strain simulation to verify the effectiveness of the static strength test method. The results show that the designed fixture strength meets the test requirements of the integrated combustion chamber casing, and the strain values at the 90° direction measurement point, measured at sensitive positions through displacement and strain measure? ments, were significantly higher than those at 0° and 45° directions. The failure surface stress was primarily affected by the principal stress at 90°. During the 0.5 MPa sealing test, the variation curves of identical strain measurement points at different locations roughly coincided, and the strain remained stable within the effective range during the load-holding phase. Under the set working load, the failure of the cas? ing component occurred at 12MPa, and the complete rupture failure occurred at 15.2MPa; the maximum strain of the test article structure was -3779με, and the maximum displacement was 4.07mm. The failure locations roughly aligned with simulation results, proving that the established test platform and analysis method can ensure the effective execution of a complete casing static strength test.

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