空气动力学学报2016，Vol.34Issue(4)：536-540,5.DOI:10.7638/kqdlxxb-2014.0084
曲面形栅格翼气动特性研究
Investigation of aerodynamic characteristics on circular-arc grid-fin configurations
李永红 1黄勇 1陈建中 1苏继川1
作者信息
- 1. 中国空气动力研究与发展中心 高速空气动力研究所，四川 绵阳 621000
- 折叠
摘要
Abstract
In order to reduce flow choking and the corresponding high drag force,an im-proved circular-arc grid-fin configuration is proposed in the present study.Compared to the con-ventional grid-fin configuration,the circular-arc layout decreases the length of the fin cell as to reduce the flow choking.Meanwhile,the circular-arc grid fins can be conveniently folded against the body so as to make them easier to store and transport.Viscous computational fluid dynamic simulations were performed to investigate flows over single grid fin.Comparisons of drag coeffi-cients between circular-arc and sweptback grid fins indicate that both configurations have signifi-cant drag reduction under subsonic、transonic and supersonic than baseline grid fin configuration. However,when the flow velocity is above the third critical Mach number,the drag reduction of circular-arc grid fin is higher than that of sweptback grid fin.Through aerodynamic analysis of two different windward forms of circular-arc grid fins,it is clear that before the third critical Mach number,the lift coefficient of the convex plane windward model is much greater than the concave plane windward model (approximately 30%)and the baseline model,after the third criti-cal Mach number the lift coefficient of the convex plane windward model and the baseline model tend to be consistent,while the concave plane windward model has a greater lift coefficient.关键词
栅格翼/曲面形/后掠形/减阻效果/数值模拟Key words
grid fin/circular-arc form/sweptback form/drag reduction effect/numerical simulation分类
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李永红,黄勇,陈建中,苏继川..曲面形栅格翼气动特性研究[J].空气动力学学报,2016,34(4):536-540,5.
