动导数数值预测中的相关问题

doi:10.7527/S1000-6893.2016.0180

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动导数数值预测中的相关问题

袁先旭, 陈琦, 谢昱飞, 陈坚强

中国空气动力研究与发展中心计算空气动力研究所, 绵阳 621000

收稿日期:2016-04-21 修回日期:2016-06-04 出版日期:2016-08-15 发布日期:2016-06-09
通讯作者: 谢昱飞,Tel.:0816-2463090。E-mail:xyf_5843@qq.com E-mail:xyf_5843@qq.com
作者简介:袁先旭,男,博士,研究员。主要研究方向:非定常流动数值模拟、飞行器动态特性分析、复杂流动数值计算方法等。Tel:0816-2463168。E-mail:yuanxianxu@cardc.cn;陈琦,男,博士,助理研究员。主要研究方向:非定常流动数值模拟、飞行动态特性分析、计算软件开发等。Tel:0816-2463304。E-mail:chenqi@mail.ustc.edu.cn;谢昱飞,男,博士,副研究员。主要研究方向:非定常流动数值模拟、飞行动态特性分析等。Tel:0816-2463090。E-mail:xyf_5843@qq.com
基金资助:
国家自然科学基金（11172315，11372341，11532016）

Problems in numerical prediction of dynamic stability derivatives

YUAN Xianxu, CHEN Qi, XIE Yufei, CHEN Jianqiang

Computational Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China

Received:2016-04-21 Revised:2016-06-04 Online:2016-08-15 Published:2016-06-09
Supported by:
National Natural Science Foundation of China (11172315, 11372341, 11532016)

摘要/Abstract

摘要：

动导数是飞行器动态稳定性分析、弹道设计和控制系统设计的重要参数，其预测方法主要有工程近似方法、数值模拟和风洞试验。基于动导数、交叉导数的概念，介绍了强迫振荡法、自由振荡法等预测动导数的数值模拟方法，重点就超声速、高超声速动导数数值预测中存在的问题开展讨论，包括时间步长、子迭代步数的选取；振荡频率对辨识结果的影响；强迫振荡法和自由振荡法辨识动导数可能存在差异的原因分析；交叉导数和交叉耦合导数的辨识问题以及飞行器构型对动导数预测的影响等。并结合算例进行了具体分析，在总结现有研究经验的同时，针对当前研究中存在的困惑和难题，提出了相应的改进建议。

关键词: 动导数, 交叉导数, 强迫振荡, 自由振荡, 振荡频率

Abstract:

Dynamic stability derivative is one of the important parameters in the design of control system, the design of flight orbit, and the analysis of dynamic stability of vehicles. The prediction methods of the dynamic stability derivatives mainly include the engineering approximations, numerical simulations and wind tunnel tests. The concepts of dynamic stability derivative and cross derivative are reviewed, and the forced oscillation and free oscillation methods for numerically predicting the dynamic stability derivatives are introduced. The problems existing in the numerical prediction are specially discussed, including the choice of time-marching step and step number of sub-iteration, the effects of the oscillating frequency on the identification results, the analysis of the probable reasons which lead to the difference between the forced oscillation and free oscillation methods in dynamic derivative identification, the identification of the cross and cross coupling derivatives, and the identification of dynamic stability derivatives of the integrated internal-external flow vehicles. The discussions are made with computational cases and detailed analysis, in which both experiences and puzzles exist, and the corresponding suggestions for improvement are presented.

Key words: dynamic derivative, cross derivative, forced oscillation, free oscillation, oscillating frequency

中图分类号:

V211.3

袁先旭, 陈琦, 谢昱飞, 陈坚强. 动导数数值预测中的相关问题[J]. 航空学报, 2016, 37(8): 2385-2394.

YUAN Xianxu, CHEN Qi, XIE Yufei, CHEN Jianqiang. Problems in numerical prediction of dynamic stability derivatives[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(8): 2385-2394.

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动导数数值预测中的相关问题

Problems in numerical prediction of dynamic stability derivatives

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