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| 进口温度不均匀对涡轮叶片热应力的影响 |
| Effect of non-uniform inlet temperature profiles on the thermal stress in turbine blade |
| 投稿时间：2013-06-30 |
| DOI：10.13259/j.cnki.eri.2014.02.012 |
| 中文关键词: 燃气涡轮 气热耦合 热应力 有限元方法 |
| 英文关键词:gas turbine coupled thermal aerodynamics analysis thermal stress finite element method |
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| 摘要点击次数: 2339 |
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| 中文摘要: |
| 针对航空涡轮叶片的温度场预测问题，采用CFD（computational fluid dynamics）软件和有限元计算理论与方法，以对流冷却叶片的温度场与热应力求解为例，分别计算了涡轮进口温度均匀和不均匀时叶片的温度场和热应力，分析了涡轮进口温度不均匀对叶片热应力的影响，其中叶片温度场的求解采用气热耦合的方法即直接应用CFD软件计算叶片温度场，再依据温度场进行了有限元热应力分析.结果表明，进口温度不均匀时比进口温度均匀时叶片的热应力增大10%左右. |
| 英文摘要: |
| In order to predict temperature field for gas turbine blades,CFD and FEA methods were used to calculate the temperature field and thermal stress in a convective cooling blade with both uniform and non-uniform inlet temperature distribution.The temperature field of the blade was directly calculated with coupled thermal aerodynamics analysis,and then the thermal stress in the blade was analyzed with FEA method.It is found that thermal stress in the blade under non-uniform inlet temperature profile was 10%~30% higher than that under uniform inlet temperature profile. |
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