| 尾流作用下对转涡轮叶片振动的流固耦合数值分析 |
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| 引用本文： | 赵振华,吕文亮,陈伟,吴铁鹰.尾流作用下对转涡轮叶片振动的流固耦合数值分析[J].南京航空航天大学学报(英文版),2011,28(1). |
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| 作者姓名： | 赵振华 吕文亮 陈伟 吴铁鹰 |
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| 作者单位： | 1. 南京航空航天大学能源与动力学院,南京,210016,中国
2. 中国航天科工集团公司三院,北京,100074,中国 |
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| 摘 要： | 采用对转涡轮设计可以提高喷气发动机的推重比.本文应用ANSYS/CFX软件,采用流固耦合数值分析方法对低压涡轮转子叶片进行了分析.对一定的涡轮工况,得到了高压涡轮转子叶片尾流作用下的低压涡轮转子叶片振动的应力和变形变化规律.采用傅里叶变换,对流体激励力、叶片应力及变形相应进行频谱分析,结果表明:在复杂来流激励下,叶片的第一阶振动较易被激起;但高阶振动响应不可忽略;而且叶身温度场不同,被激起的振动阶次也不同.
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| 关 键 词： | 对转涡轮 流固耦合 振动响应 数值分析 |
VIBRATION NUMERICAL ANALYSIS OF COUNTER-ROTATING TURBINE WITH WAKE-FLOW USING FLUID-STRUCTURE INTERACTION METHOD |
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| Zhao Zhenhua,Lü Wenliang,Chen Wei,Wu Tieying.VIBRATION NUMERICAL ANALYSIS OF COUNTER-ROTATING TURBINE WITH WAKE-FLOW USING FLUID-STRUCTURE INTERACTION METHOD[J].Transactions of Nanjing University of Aeronautics & Astronautics,2011,28(1). |
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| Authors: | Zhao Zhenhua Lü Wenliang Chen Wei Wu Tieying |
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| Abstract: | The design of counter-rotating turbine is one of new techniques to improve the thrust-weight ratio of jet propulsion engines. Numerical analysis of a low pressure (LP) counter-rotating turbine rotor blade is presented by using ANSYS/CFX software. Interaction of aerodynamics and solid mechanics coupling in the computation is applied. In some rating of turbine, stress distribution and vibration characteristics of low pressure turbine(LPT)blade are computed. The wake aerodynamic forces and LPT blade vibration are transformed in frequency domain using fast Fourier transform (FFT) method. The results show that under wake aerodynamic force excitation, the first order modal vibration is more easily aroused and the higher order response cannot be ignored. Moreover,with different temperature fields, the vibration responses of blade are also different. |
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| Keywords: | counter-rotating turbine fluid and structure coupling vibration responses numerical analysis |
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