超/高超声速飞行器动态稳定性导数极快速预测方法

doi:10.7527/S1000-6893.2019.23545

流体力学与飞行力学

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超/高超声速飞行器动态稳定性导数极快速预测方法

李正洲^1,2, 高昌¹, 肖天航², 马自成¹, 肖济良², 朱建辉²

1. 中国空气动力研究与发展中心高超声速冲压发动机技术重点实验室, 绵阳 621000;
2. 南京航空航天大学航空学院, 南京 210016

收稿日期:2019-10-08 修回日期:2019-11-29 出版日期:2020-04-15 发布日期:2020-04-22
通讯作者: 高昌 E-mail:gaochang5678@sina.com
基金资助:
高超声速超燃冲压发动机技术重点实验室基金（STS-MY-2018-007）

Extremely efficient prediction technique of dynamic derivatives for super/hypersonic flight vehicles

LI Zhengzhou^1,2, GAO Chang¹, XIAO Tianhang², MA Zicheng¹, XIAO Jiliang², ZHU Jianhui²

1. Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Mianyang 621000, China;
2. Aeronautics Engineering College, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received:2019-10-08 Revised:2019-11-29 Online:2020-04-15 Published:2020-04-22
Supported by:
Foundation of Science and Technology on Screamjet Laboratory(STS-MY-2018-007)

摘要/Abstract

摘要： 飞行器设计早期阶段需要预测大量工况下的动导数。本文发展了一种面向超/高超声速飞行器的动导数极快速预测方法：首先基于当地流活塞理论，将飞行器进行小幅非定常运动所受到的气动力分为受自由来流引起的无附加扰动项以及受物面变形或运动引起的附加扰动项；通过当地表面斜度法、激波后等熵关系求解物面当地流动参数，进而结合非定常运动规律求出飞行器所受非定常气动力；再采用待定系数法对非定常气动力进行提取、辨识，最终得到超/高超声速飞行器动导数。该方法克服了传统方法对CFD流场参数的依赖和耦合，具有极高的计算效率；同时典型算例验证表明，该方法在超声速、高超声速工况下都能够很好预测动导数变化趋势。将该方法应用于复杂外形飞行器动导数预测，并讨论了与CFD方法的误差来源。本文方法可作为高速飞行器总体设计阶段布局选型的工具。

关键词: 动导数, 强迫振动, 动稳定性, 当地流活塞理论, 高超声速, 超声速

Abstract: In the early stage of aircraft design, it is necessary to predict the dynamic stability derivatives under a large number of operating conditions. An extremely efficient prediction technique of dynamic stability derivatives for high-speed flight vehicles is developed in this paper. Firstly, based on the local piston theory, the unsteady aerodynamics of high-speed flight vehicles can be divided into the non-disturbance aerodynamic component and the disturbance aerodynamic component. Secondly, the local surface inclination method and the isentropic flow relation after a shock wave are employed to solve the surface flow variables, and then the unsteady aerodynamic forces are calculated by combining the unsteady motion. Finally, the dynamic derivatives are extracted and identified from unsteady aerodynamic forces using the undetermined coefficient method. Our method overcomes the time-consuming of the traditional CFD method that is dependent and coupled with numerical simulation flow field variables. Typical test cases indicate that our method can predict the trend of dynamic derivatives well under both supersonic and hypersonic conditions. At last, our method is successfully applied to dynamic derivatives prediction of flight vehicles with complex shape, and the error sources with CFD method are discussed. The efficient dynamic derivatives prediction technique in this paper can be used to screen layout of high-speed flight in conceptual design stage.

Key words: dynamic derivatives, forced vibration motion, dynamic stability, local piston theory, hypersonic, supersonic

中图分类号:

V221.3

李正洲, 高昌, 肖天航, 马自成, 肖济良, 朱建辉. 超/高超声速飞行器动态稳定性导数极快速预测方法[J]. 航空学报, 2020, 41(4): 123545-123545.

LI Zhengzhou, GAO Chang, XIAO Tianhang, MA Zicheng, XIAO Jiliang, ZHU Jianhui. Extremely efficient prediction technique of dynamic derivatives for super/hypersonic flight vehicles[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(4): 123545-123545.

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超/高超声速飞行器动态稳定性导数极快速预测方法

Extremely efficient prediction technique of dynamic derivatives for super/hypersonic flight vehicles

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