| 应用特征线法求解航空发动机瞬态空气系统 |
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| 引用本文： | 吴宏,胡肖肖.应用特征线法求解航空发动机瞬态空气系统[J].航空动力学报,2013,28(9):2003-2008. |
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| 作者姓名： | 吴宏 胡肖肖 |
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| 作者单位： | 北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室, 北京100191;北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室, 北京100191 |
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| 基金项目： | 国家自然科学基金(51176004) |
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| 摘 要： | 用特征线法求解瞬态航空发动机空气系统的连续方程和动量方程,单独迭代求解能量方程.计算了空气系统内流体的压力、质量流量、温度随时间的变化规律.结果表明内部节点的压力、质量流量以相近的趋势随进口压力变化,但有相应的延迟,延迟时间约为0.01s,温度随边界温度变化而变化.将准静态结果与软件Flowmaster的模拟结果对比,吻合很好,压力最大相对误差为0.051%.
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| 关 键 词： | 瞬态 空气系统 特征线法 算法 模拟 |
| 收稿时间： | 2012/8/13 0:00:00 |
Solving transient second air system in engine by characteristics method |
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| WU Hong and HU Xiao-xiao.Solving transient second air system in engine by characteristics method[J].Journal of Aerospace Power,2013,28(9):2003-2008. |
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| Authors: | WU Hong and HU Xiao-xiao |
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| Institution: | National Key Laboratory of Science and Technology on Aero-engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | The characteristics method was used to solve continuity equation and momentum equation of transient second air system in engine,and the energy equation was solved iteratively.The time-dependent change rules of pressure,mass flow rate and temperature of the flow in second air system were calculated.The result shows that the changes in pressure and mass flow rate of inner nodes vary similarly with the changes of inlet pressure with a corresponding delay time of 0.01s,and the temperatures of elements vary with the boundary temperature.The quasi-static results show good agreement with that of software of Flowmaster,and the maximum relative error of pressure is 0.051%. |
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| Keywords: | transient second air system characteristics method algorithm simulation |
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