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方形截面弹俯仰振荡对滚转特性的影响

陈琦 陈坚强 袁先旭 谢昱飞

陈琦, 陈坚强, 袁先旭, 谢昱飞. 方形截面弹俯仰振荡对滚转特性的影响[J]. 力学学报, 2016, 48(6): 1281-1289. doi: 10.6052/0459-1879-16-132
引用本文: 陈琦, 陈坚强, 袁先旭, 谢昱飞. 方形截面弹俯仰振荡对滚转特性的影响[J]. 力学学报, 2016, 48(6): 1281-1289. doi: 10.6052/0459-1879-16-132
Chen Qi, Chen Jianqiang, Yuan Xianxu, Xie Yufei. NUMERICAL STUDY OF THE EFFECT OF FORCED PITCHING OSCILLATION ON ROLLING CHARACTERISTICS OF VEHICLE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(6): 1281-1289. doi: 10.6052/0459-1879-16-132
Citation: Chen Qi, Chen Jianqiang, Yuan Xianxu, Xie Yufei. NUMERICAL STUDY OF THE EFFECT OF FORCED PITCHING OSCILLATION ON ROLLING CHARACTERISTICS OF VEHICLE[J]. Chinese Journal of Theoretical and Applied Mechanics, 2016, 48(6): 1281-1289. doi: 10.6052/0459-1879-16-132

方形截面弹俯仰振荡对滚转特性的影响

doi: 10.6052/0459-1879-16-132
基金项目: 国家自然科学基金资助项目(11172315,11372341,11532016).
详细信息
    通讯作者:

    陈琦,博士,主要研究方向:非定常流动、动态特性分析.E-mail:chenqi@mail.ustc.edu.cn

    陈坚强,研究员,主要研究方向:数值计算方法、高超声速复杂流动数值模拟和高超声速飞行器设计等.E-mail:jq-chen@263.net

  • 中图分类号: O355

NUMERICAL STUDY OF THE EFFECT OF FORCED PITCHING OSCILLATION ON ROLLING CHARACTERISTICS OF VEHICLE

  • 摘要: 飞行器在大气环境中飞行时,经常受阵风等的干扰,引发非指令的自激振荡,威胁飞行安全.通过建立刚体六自由度运动方程和N-S方程的松耦合求解技术,研究强迫俯仰振荡过程对滚转特性的影响.针对背风区涡流形态及横侧向气动特性复杂的方形截面飞行器,数值模拟研究了其不同攻角下的静态滚转气动特性、自由滚转运动特性,以及俯仰振荡时不同振荡速率对滚转气动和运动特性的影响.结果表明,此飞行器在静态时临界攻角约为13°,当攻角小于临界攻角时,滚转方向是静不稳定的,诱发快速滚转运动;当攻角大于临界攻角时,滚转方向是静稳定,其滚转运动是收敛的.研究发现,俯仰振荡一般会降低飞行器滚转方向静稳定或静不稳定的量值,增强滚转方向的动态稳定性.在俯仰振荡的影响下,即使滚转方向是静不稳定的,如果俯仰振荡的频率足够大,飞行器的滚转运动也可能是收敛的.

     

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出版历程
  • 收稿日期:  2016-05-17
  • 修回日期:  2016-07-25
  • 刊出日期:  2016-11-18

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