收稿日期:
2021-09-28
修回日期:
2021-11-01
接受日期:
2021-12-16
出版日期:
2023-02-25
发布日期:
2022-01-04
通讯作者:
王方剑
E-mail:wfangjian@163.com
基金资助:
Fangjian WANG(), Ke XIE, Jin LIU, Yuhui SONG, Han QIN, Lan CHEN
Received:
2021-09-28
Revised:
2021-11-01
Accepted:
2021-12-16
Online:
2023-02-25
Published:
2022-01-04
Contact:
Fangjian WANG
E-mail:wfangjian@163.com
Supported by:
摘要:
小展弦比飞翼布局是中国新型战斗机布局的选择之一,其动态特性尤为重要。针对小展弦比飞翼标模在较大攻角下出现的非定常流动与自由摇滚现象,采用延迟脱体涡模拟(DDES)方法以及动力学模态分解(DMD)方法研究了飞翼标模在Ma=0.6下的非定常流动特性、脉动压力特性、自由摇滚特性,分析运动失稳机理,探索失稳运动控制方法。研究表明:飞翼标模大攻角下非定常流动特性主要体现为,头部发展的集中涡、涡破裂、螺旋波流动结构,其中旋涡破裂点以St=0.12~0.23的频率沿涡轴振荡,螺旋波频率在St=1.16~2.33范围内。数值模拟获得的飞翼标模自由摇滚特征与风洞试验吻合较好,摇滚运动出现在俯仰角24.5°~26°,滚转角平衡位置为28°。对摇滚机理的研究发现,背风侧的集中涡流动与迎风侧的分离流动相互“博弈”是摇滚运动发生与维持的物理机制。上扰流板打开30°时,对自由摇滚运动控制效果不明显,外侧副翼向下打开30°时,自由摇滚现象能够得到较好的抑制。
中图分类号:
王方剑, 解克, 刘金, 宋玉辉, 秦汉, 陈兰. 小展弦比飞翼标模非定常流动及自由摇滚特性[J]. 航空学报, 2023, 44(4): 126449.
Fangjian WANG, Ke XIE, Jin LIU, Yuhui SONG, Han QIN, Lan CHEN. Unsteady flow and wing rock characteristics of low aspect ratio flying-wing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023, 44(4): 126449.
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