基于瞬态流-热-机械网络的涡轴发动机轴断裂超转仿真

马清琳; 丁水汀; 邱天; 綦蕾; 刘传凯; 甘宸宇; 鲍圣宇; 王鑫铭

doi:10.13224/j.cnki.jasp.20240158

基于瞬态流-热-机械网络的涡轴发动机轴断裂超转仿真

doi: 10.13224/j.cnki.jasp.20240158

马清琳^1,,
丁水汀^{2, 3},
邱天^2,*, ,,
綦蕾²,
刘传凯²,
甘宸宇¹,
鲍圣宇²,
王鑫铭²

1.
北京航空航天大学能源与动力工程学院，北京 100191
2.
北京航空航天大学航空发动机研究院，北京 100191
3.
中国民航大学安全科学与工程学院，天津 300300

基金项目: 民用飞机专项（MJZ2-2N21）； “两机”重大专项基础研究项目（J2019-Ⅷ-0001-0162）

详细信息

作者简介:
马清琳（1998-），男，博士生，主要从事航空发动机复杂系统安全性与适航研究。E-mail：maqinglin@buaa.edu.cn

通讯作者:
邱天（1986-），男，副研究员，博士，主要从事航空发动机安全性设计和验证技术研究。E-mail：qiutian@buaa.edu.cn

中图分类号: V235.12⁺1
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出版历程
- 收稿日期: 2024-03-20
- 网络出版日期: 2025-08-19

Overspeed simulation of turboshaft engine rotor after shaft fracture based on transient aero-thermo-mechanical network model

1.
School of Energy and Power Engineering，Beihang University，Beijing 100191，China
2.
Research Institute of Aero-Engine，Beihang University，Beijing 100191，China
3.
College of Safety Science and Engineering，Civil Aviation University of China，Tianjin 300300，China

摘要

摘要:
为了满足适航规章中的转子完整性要求，获得航空发动机的转子在轴断裂失效条件下的超转规律，提出了将发动机模化为瞬态流-热-机械网络的建模方法。在此基础上，对涡轴发动机在地面起飞状态下发生轴断裂失效后转子超转过程进行了瞬态仿真分析，获取了转子超转的规律和机理。分析过程中考虑了轴失效位置、控制系统和超转保护装置的影响。结果表明：相较于附件系统功率提取轴和燃气发生器轴断裂，动力涡轮轴断裂可使转子达到更为严苛的超转状态；动力涡轮级间连接轴失效条件下，动力输出轴转速下降会使控制系统提高燃油供给；可以采用叶片脱落等超转保护装置限制转子持续加速。
- 适航 /
- 转子完整性 /
- 轴断裂 /
- 超转保护 /
- 网络模型 /
- 瞬态仿真
Abstract:
In order to meet the rotor integrity requirements in the airworthiness regulations and obtain the overspeed law of an aero-engine under the condition of shaft fracture failure, a method of modeling the engine as a transient aero-thermal-mechanical network was proposed. On this basis, the transient simulation analysis of the rotor overspeed process after shaft fracture failure of the turboshaft engine in the ground takeoff condition was carried out. The effects of shaft failure position, control system and overspeed protection device were considered during the analysis. The results showed that the power turbine shaft fracture can cause the rotor to reach a more severe overspeed condition, if compared with the accessory system power extraction shaft and gas generator shaft fracture. Under the power turbine interstage connection shaft failure condition, the decrease in the rotational speed of the power output shaft caused the control system to increase the fuel supply. The blade-off protection device can be used to limit the sustained acceleration of the rotor.
- airworthiness /
- rotor integrity /
- shaft failure /
- overspeed protection /
- network model /
- transient simulation

HTML

图 1 涡轴发动机的瞬态流-热-机械网络模型

Figure 1. Aero-thermo-mechanical transient model of turboshaft engine

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图 2 轴断裂失效位置

Figure 2. Shaft fracture location

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图 3 附件系统功率提取轴断裂时发动机参数的演化规律

Figure 3. Engine parameters’ response when accessory power extraction shaft fractures

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图 4 燃气发生器轴断裂时压气机工作点的演化规律

Figure 4. Compressor working point’s response when gas generator shaft fractures

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图 5 燃气发生器轴断裂时转速的演化规律

Figure 5. Overspeed when gas generator shaft fractures

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图 6 动力输出轴断裂时超转的演化规律

Figure 6. Overspeed when power turbine shaft fractures

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图 7 算例401中发动机参数的演化规律

Figure 7. Engine parameters’ response under case 401

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图 8 算例401中燃气发生器转速的演化规律

Figure 8. Gas generator overspeed under case 401

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图 9 算例401中第一级动力涡轮转子轴向力

Figure 9. Axial force on the first stage power turbine under case 401

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表 1 动力涡轮轴断裂条件下超转保护设置

Table 1. Overspeed protection setup under power turbine shaft fracture conditions

算例编号	轴断裂位置	是否使用电子超转保护	是否使用叶片脱落式超转保护
400	#4		否
401	#4		是
500	#5	否	否
510	#5	是	否
511	#5	是	是

下载: 导出CSV

表 2 不同轴断裂位置情况下转子超转对比

Table 2. Comparison of rotor overspeed for different shaft fracture positions

轴断裂位置	对于转速的关键转子	最大超转/%	轴断裂至最大超转时间/ms	超转保护装置或现象
1#	动力涡轮	101.0	1 300	PID控制器
2#	燃气涡轮	100.8	5	压气机喘振
3#	压气机和第一级燃气涡轮	102.9	17	压气机喘振
4#	第一级动力涡轮	120.0	97	涡轮叶片脱落
5#	动力涡轮	120.0	120	涡轮叶片脱落

下载: 导出CSV

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