FGH99合金双性能涡轮盘破裂转速分析与验证

秦仕勇; 米春虎; 古远兴; 胡殿印; 黎方娟; 胡绪腾; 潘容

doi:10.13224/j.cnki.jasp.20230383

FGH99合金双性能涡轮盘破裂转速分析与验证

doi: 10.13224/j.cnki.jasp.20230383

1.
中国航发四川燃气涡轮研究院，成都 610500
2.
北京航空航天大学航空发动机研究院，北京 100191
3.
南京航空航天大学能源与动力学院，南京 210016

详细信息

作者简介:
秦仕勇（1986-），男，研究员，博士生，主要从事航空发动机结构强度研究

中图分类号: V232.3
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- 文章访问数: 1259
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- 被引次数: 0
出版历程
- 收稿日期: 2023-06-10
- 网络出版日期: 2024-11-06

Analysis and verification of burst speed of FGH99 alloy dual property turbine disk

1.
Sichuan Gas Turbine Establishment，Aero Engine Corporation of China，Chengdu 610500，China
2.
Research Institute of Aero-Engine，Beihang University，Beijing 100191，China
3.
College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

摘要

摘要:
考虑不同组织分区材料性能差异影响，基于平均应力法、极限应变法、能量法及塑性失稳法进行了FGH99合金双性能涡轮盘破裂转速分析，并在室温和高温441 ℃下开展了涡轮盘破裂转速试验，均发生了径向破裂。与试验结果对比表明：平均应力法预测结果偏大，达到了9.42%，破裂模式预测结果不准确，径向破裂转速预测时应考虑修正系数0.80；极限应变法和能量法预测破裂转速与试验结果误差较小，最大为0.98%，且预测的破裂起始位置与试验结果吻合；塑性失稳法准确地预测了破裂模式，且破裂转速最大误差为2.27%。
- FGH99 /
- 双性能 /
- 涡轮盘 /
- 破裂转速 /
- 平均应力法 /
- 能量法 /
- 塑性失稳
Abstract:
Considering the influence of material performance differences in different organizational zones, the burst speed analysis of FGH99 alloy dual property turbine disk was conducted based on the average stress method, ultimate strain method, energy method, and plastic instability method. The turbine disk burst speed tests were conducted at room temperature and high temperature of 441 ℃, and radial fracture occurred in all cases. Comparison between the analysis and the test results showed that: the predicted result was larger than test data when using the average stress method with the error of 9.42%, and the prediction of fracture mode was not accurate. The correction factor 0.80 should be considered when predicting the radial burst speed; the maximum error between the predicted burst speed using the limit strain method and the energy method and the experimental results was 0.98%, and the predicted fracture starting position was consistent with the experimental results; the plastic instability method accurately predicted the fracture mode, and the maximum error in burst speed was 2.27%.
- FGH99 /
- dual property /
- turbine disk /
- burst speed /
- average stress method /
- energy method /
- plastic instability

HTML

图 1 涡轮盘组织分区示意图

Figure 1. Schematic diagram of turbine disk tissue zones

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图 2 FGH99拉伸真应力-真应变曲线

Figure 2. FGH99 tensile real stress-strain curve

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图 3 有限元模型

Figure 3. Finite element model

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图 4 均温441 ℃涡轮盘应力分布

Figure 4. Stress distribution of turbine disk at an average temperature of 441 ℃

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图 5 室温涡轮盘应力分布

Figure 5. Stress distribution of turbine disc at room temperature

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图 6 径向破裂转速储备系数分布

Figure 6. Distribution of radial rupture speed reserve coefficient

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图 7 A～D处塑性应变随转速关系曲线

Figure 7. Relationship between plastic strain and rotational speed of positions A to D

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图 8 A～D处应变能密度随转速关系曲线

Figure 8. Relationship between strain energy density and rotational speed of positions A to D

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图 9 轮缘及盘心径向位移随转速的变化关系

Figure 9. Relationship between radial displacement and rotational speed of disc rim and center

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图 10 位置r₁处平均塑性应变随转速的变化关系

Figure 10. Relationship between average plastic strain and rotational speed at position r₁

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图 11 涡轮盘破裂形貌

Figure 11. Fracture morphology of turbine disc

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图 12 涡轮盘破裂过程

Figure 12. Turbine disk rupture process

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图 13 涡轮盘破裂整体形貌及裂纹走向

Figure 13. Overall morphology and crack direction of turbine disc fracture

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图 14 涡轮盘表面起裂及扩展示意图

Figure 14. Schematic diagram of surface cracking and expansion of turbine disc

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表 1 不同组织分区的拉伸性能

Table 1. Tensile properties of different tissue zones

温度	分区	拉伸强度/MPa	屈服强度/MPa
室温	细晶区	1684	1247
	过渡区	1593	1182
	粗晶区	1543	1040
441 ℃	细晶区	1591	1167
	过渡区	1449	1097
	粗晶区	1347	990

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表 2 破裂转速预测结果

Table 2. Prediction results of burst speed

温度	破裂方式	破裂截面	破裂转速/ （r/min）	破裂转速储备系数
441℃	径向破裂	径向截面 r₁=172 mm	25168	1.28
441℃	周向破裂	子午面	24686	1.23
室温	径向破裂	径向截面 r₁=172 mm	26353	1.32
室温	周向破裂	子午面	24459	1.23

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表 3 极限塑性应变破裂转速预测结果

Table 3. Prediction results of ultimate plastic strain burst speed

温度	极限塑性应变	预测破裂转速/（r/min）
441 ℃	0.17	23680
室温	0.23	24000

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表 4 临界应变能密度对应的破裂转速

Table 4. Burst speed corresponding to critical strain energy density

温度	临界应变能密度U^*/（J/m³）	预测破裂转速/（r/min）
441 ℃	241	23700
室温	317	23950

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表 5 预测结果与破裂试验结果对比

Table 5. Comparison between predicted results and fracture test results

方法	温度	预测结果/（r/min）	试验结果/（r/min）	误差/%
平均应力法	室温	26353	24084	9.42
平均应力法	441 ℃	25168	23468	7.24
极限应变	室温	24150	24084	0.27
极限应变	441 ℃	23680	23468	0.90
能量法	室温	23950	24084	0.55
能量法	441 ℃	23700	23468	−0.98
塑性失稳	室温	24500	24084	1.73
塑性失稳	441 ℃	24000	23468	2.27

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表 6 径向破裂转速修正系数

Table 6. Correction factors for radial burst speed

方法	温度	试验结果/（r/min）	修正系数
平均应力法	室温	24084	0.80
平均应力法	441℃	23468	0.81

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