内外流一体化飞行器动导数数值预测

doi:10.19596/j.cnki.1001-246x.7733

计算物理 ›› 2018, Vol. 35 ›› Issue (5): 563-570.DOI: 10.19596/j.cnki.1001-246x.7733

内外流一体化飞行器动导数数值预测

陈琦, 谢昱飞, 袁先旭, 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:2017-08-06 修回日期:2017-09-20 出版日期:2018-09-25 发布日期:2018-09-25
作者简介:陈琦(1983-),男,安徽阜南,博士,主要从事飞行器动态特性与非定常流动数值模拟研究,E-mail:chenqi@mail.ustc.edu.cn
基金资助:
国家自然科学基金（11702314，11532016）资助项目

Numerical Investigation of Dynamic Derivative for Airframe/Propulsion Integrative Vehicles

CHEN Qi, XIE Yufei, YUAN Xianxu, CHEN Jianqiang

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

Received:2017-08-06 Revised:2017-09-20 Online:2018-09-25 Published:2018-09-25

摘要/Abstract

摘要： 研究内外流一体化飞行器通流模型和带整流罩模型，考核强迫振荡法和自激振荡法在内外流一体化飞行器上的适用性，详细分析时间步长、振荡频率等参数对动导数的影响.研究发现，强迫振荡法在内外流一体化飞行器动导数预测中具有较好的适用性，但与常规的纯外流飞行器相比，时间步长的选取、计算时间及振荡频率等参数的选择都有较大不同.对常规的纯外流飞行器，自由振荡法的预测结果与强迫振荡法符合较好，但对内外流一体化飞行器外形，两者相差50%以上，差异的来源及产生的机理尚需开展深入的研究.

关键词: 内外流一体化飞行器, 动导数, 强迫振荡, 自由振动

Abstract: Applicability of numerical prediction method of dynamic derivatives is studied with forced oscillation method and free oscillation method on the airframe/propulsion integrative vehicle with and without fairing. Effect of parameters on dynamic derivative prediction in forced oscillation method such as time step and oscillation frequency is analyzed in detail. It shows that forced oscillation method is well applied in dynamic derivative prediction of integrative vehicle with internal and external flow, while parameters select of time step, computational time and oscillation frequency are quite different from external-flow-only vehicle. Dynamic derivatives by free oscillation method are in agreement with results with forced oscillation method on external-flow-only vehicle. There is a difference about 50% on integrative vehicle with internal and external flow. Origin and mechanism of differences in two methods need to be deeply studied.

Key words: integrative vehicle with internal and external flow, dynamic derivative, forced oscillation, free oscillation

中图分类号:

陈琦, 谢昱飞, 袁先旭, 陈坚强. 内外流一体化飞行器动导数数值预测[J]. 计算物理, 2018, 35(5): 563-570.

CHEN Qi, XIE Yufei, YUAN Xianxu, CHEN Jianqiang. Numerical Investigation of Dynamic Derivative for Airframe/Propulsion Integrative Vehicles[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2018, 35(5): 563-570.

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内外流一体化飞行器动导数数值预测

Numerical Investigation of Dynamic Derivative for Airframe/Propulsion Integrative Vehicles

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