| 引用本文: | 柴振霞,刘伟,刘绪,等.机体/推进一体化飞行器动导数频域计算方法.[J].国防科技大学学报,2018,40(3):30-36.[点击复制] |
| CHAI Zhenxia,LIU Wei,LIU Xu,et al.Frequency domain method for computing dynamic derivatives of airframe/propulsion integrative vehicle[J].Journal of National University of Defense Technology,2018,40(3):30-36[点击复制] |
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| 机体/推进一体化飞行器动导数频域计算方法 |
| 柴振霞, 刘伟, 刘绪, 杨小亮 |
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(国防科技大学 空天科学学院， 湖南 长沙 410073)
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| 摘要: |
| 运用Etkin非定常气动力模型，将谐波平衡法应用于复杂外形动导数辨识。计算结果表明：谐波平衡法和时域方法的动导数辨识结果一致，与实验值吻合，验证了程序的正确性和谐波平衡法的可靠性。采用谐波平衡法对类X-51高超声速机体/推进一体化飞行器WR-A进行动导数辨识，并与时域方法的计算结果比较，考察了该方法在复杂外形下数值模拟非定常流动和动导数辨识的能力。实验结果表明：对于WR-A这种复杂外形飞行器，谐波平衡法也能在保证精度的同时具有较高的计算效率。 |
| 关键词: 高超声速飞行器 谐波平衡法 时域方法 数值模拟 动导数 |
| DOI：10.11887/j.cn.201803005 |
| 投稿日期：2017-04-13 |
| 基金项目:国家自然科学基金资助项目（11502292）；国防科技大学重大应用基础研究资助项目（ZDYYJCYJ20140101）；国防科工局国防基础科研计划资助项目（C1520110002） |
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| Frequency domain method for computing dynamic derivatives of airframe/propulsion integrative vehicle |
| CHAI Zhenxia, LIU Wei, LIU Xu, YANG Xiaoliang |
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(College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| With the help of the unsteady Etkin aerodynamic model, the harmonic balance method to calculate the dynamic derivatives of complicated configuration was applied. The dynamic derivatives solved by harmonic balance method agree well with the results of time domain method and experimental data, which verified the correctness of codes and the reliability of the harmonic balance method. The harmonic balance method was applied to compute the dynamic derivatives of X-51 hypersonic airframe/propulsion integrative vehicle namely WR-A. A comparison was made with the time domain method to verify the ability of the harmonic balance method for the numerical simulation of unsteady flows around the complicated model and the ability of the computing dynamic derivatives. Results show that even for the vehicle WR-A of the complex configuration, the harmonic balance method was computationally accurate and efficient. |
| Keywords: hypersonic vehicle harmonic balance method time domain method numerical simulation dynamic derivatives |
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