超音速条件下复杂带翼外形的强迫振动分析
Forced Vibration Analysis of Complex Configurations with Fins in Supersonic Environment
摘要:
基于三维非定常N-S (Navier Stokes)方程开展超音速条件下“十”字翼导弹动态特性数值研究。空间方向的离散采用二阶精度的Roe格式，非定常流动求解采用“双时间步”(Dual-time-step)方法的隐式LU-SGS格式。在Etkin非定常气动力模型基础上，通过强迫简谐运动过程辨识动态稳定性参数(动导数)，分析了减缩频率、子迭代步数和网格规模对动导数辨识结果的影响，并通过与实验结果的比较，验证了计算结果的可靠性。
Abstract:
A numerical simulation investigation based on the Navier Stokes equations of dynamic characteristics of missile geometries with fins in Supersonic Environment was presented. The 2-order Roe scheme and the dual-time-step method are respectively applied to discrete of the spatial and time derivative of the unsteady fluency. Based on the unsteady Etkin pneumatics model, dynamic stability derivatives were calculated from load history of the unsteady flow. The influence of frequency of force-oscillation, inner-iteration steps and mesh dimension to aerodynamic force/moment was investigated. The dynamic stability derivatives predicted by the present methods quite agree with the experiment results.
参考文献
|
[1]
|
刘伟, 赵海洋, 杨小亮. 飞行器动态气动特性数值模拟方法[M]. 长沙: 国防科技大学出版社, 2015.
|
|
[2]
|
柴振霞, 刘伟, 刘绪, 等. 谐波平衡法数值模拟周期性非定常流动[J]. 国防科技大学学报, 2017, 39(4): 168-173.
|
|
[3]
|
李乾, 赵忠良, 王晓冰, 等. 一种近空间高超声速飞行器滚转稳定性研究[J]. 航空学报, 2018(3): 121553.
|
|
[4]
|
宋万强, 徐悦. 一种基于欧拉方程的动导数简化计算方法[J]. 航空科学技术, 2017, 28(2): 39-42.
|
|
[5]
|
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.
|
|
[6]
|
East, R.A. and Hutt, G.R. (1988) Comparison of Predication and Experimental Data for Hypersonic Pitching Motion Stability. Spacecraft, 25, 225-233.
|
|
[7]
|
Murthy, H.S. (2015) Subsonic and Transonic Roll Damping Measurements on Basic Finner. Journal of Spacecraft & Rockets, 19, 86. [Google Scholar] [CrossRef]
|
|
[8]
|
孙智伟, 程泽荫, 白俊强, 等. 基于准定常的飞行器动导数的高效计算方法[J]. 飞行力学, 2010, 28(2): 28-30.
|
|
[9]
|
Regan, F.J. (1964) Roll Damping Moment Measurements for the Basic Finner at Subsonic and Supersonic Speeds. NAVORD Report 6652.
|
|
[10]
|
Whyte, R.H. (1969) Spinner—A Computer Program for Predicting the Aerodynamic Coefficients of Spin Stabilized Projectiles. General Elec-tric Class 2 Reports.
|