航空学报 > 2018, Vol. 39 Issue (5): 121701-121701   doi: 10.7527/S1000-6893.2017.21701

超声速细长飞行器前置小翼展开过程的非定常特性

唐海敏, 杜厦, 傅建明, 李欣益   

  1. 上海机电工程研究所, 上海 201109
  • 收稿日期:2017-08-29 修回日期:2017-11-03 出版日期:2018-05-15 发布日期:2017-11-03
  • 通讯作者: 傅建明,E-mail:fujianming_fluid@163.com E-mail:fujianming_fluid@163.com
  • 基金资助:
    上海市自然科学基金(15ZR1421600)

Unsteady performance of a supersonic slender vehicle during spreading of the front wings

TANG Haimin, DU Sha, FU Jianming, LI Xinyi   

  1. Shanghai Electro-mechanical Engineering Institute, Shanghai 201109, China
  • Received:2017-08-29 Revised:2017-11-03 Online:2018-05-15 Published:2017-11-03
  • Supported by:
    Natural Science Foundation of Shanghai(15ZR1421600)

摘要: 针对大长细比飞行器外形超声速大迎角条件下前置小翼展开过程引起的非定常问题,应用结构动网格技术和基于脱体涡模拟(DES)的非定常数值模拟技术进行了研究,获得了详细的小翼展开过程流场结构非定常变化特性,并分析了小翼展开引起的法向力、纵向压心系数等气动特性随展开角度的变化规律。研究结果表明:超声速大迎角条件下前置小翼展开过程对小翼附近区域以及尾舵区域产生了强烈的干扰影响。小翼完全展开后,压心前移4.1%,降低了飞行器静稳定性,法向力系数增加15.6%,提高了气动过载,对飞行器机动性能均产生有利影响。

关键词: 前置小翼, 超声速, 大迎角, 非定常, 脱体涡模拟(DES)

Abstract: To research the unsteady performance of a supersonic vehicle during spreading of the front wings at high angle of attack, an unsteady numerical method based on the moving structure grid technique and Detached Eddy Simulation (DES) has been developed. The process of spreading of the front wings for a supersonic vehicle with large slenderness ratio has been investigated. Detailed unsteady progress of the flow field structure during spreading of the front wings is obtained. Variation in the aerodynamic characteristics such as the normal force coefficient and the center of pressure with spread angles of the front wing is analyzed. The results show that there is obviously unsteady effect and intense interference on the regions around the front wings and rear fins at high angle of attack during spreading of the front wings. After the spreading of the front wings, the center of pressure of the vehicle is moved forward by about 4.1%, and the static stability of the vehicle is reduced. Moreover, the normal force coefficient is increased by about 15.6%, and the aerodynamic overload is improved. These variations are good for enhancing the maneuverability of the vehicle.

Key words: front wing, supersonic, high angle of attack, unsteady, detached eddy simulation (DES)

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