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| 前体涡非对称分离机理及前缘吹气控制研究 | |
| 引用本文： | 杨明智,袁先旭,谢昱飞,张来平,邓小刚. 前体涡非对称分离机理及前缘吹气控制研究[J]. 空气动力学学报, 2009, 27(2) |
| 作者姓名： | 杨明智 袁先旭 谢昱飞 张来平 邓小刚 |
| 作者单位： | 1. 中南大学轨道交通安全教育部重点实验室,湖南,长沙,410075 2. 中南大学轨道交通安全教育部重点实验室,湖南,长沙,410075;中国空气动力研究与发展中心,四川,绵阳,621000 3. 中国空气动力研究与发展中心,四川,绵阳,621000 |
| 摘 要： | 通过设计对称性算法,求解层流Navier-Stokes方程,数值模拟了细长体在低超声速情况下前体背风涡随攻角演化的规律,在此基础上,进一步研究了前缘吹气对前体涡演化和侧向力特性的控制机理.根据数值模拟结果及分析,倾向于支持在层流框架内,前体涡的非对称失稳是一种对流不稳定机制,要想根据需要产生对称或不对称的前体涡,就必须外加持续的扰动.在约16°～48°攻角区间内,前缘吹气可产生规律性较好的侧向力,有可能直接利用前体涡进行横侧向控制.为工程实用化,需提高前缘吹气的激励收益效费比. |
| 关 键 词： | 前体涡 前缘吹气 非对称分离 流动机理 |
Numerical research on the asymmetry mechanism of fore-body vortex and active control |
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| YANG Ming-zhi,YUAN Xian-xu,XIE Yu-fei,ZHANG Lai-ping,DENG Xiao-gang. Numerical research on the asymmetry mechanism of fore-body vortex and active control[J]. Acta Aerodynamica Sinica, 2009, 27(2) | |
| Authors: | YANG Ming-zhi YUAN Xian-xu XIE Yu-fei ZHANG Lai-ping DENG Xiao-gang |
| Affiliation: | 1.Key Laboratory for Track Traffic Safety of Ministry Education CSU;Changsha 410075;China;2.China Aerodynamic Research and Development Center;Sichuan Mianyang 621000;China |
| Abstract: | In this paper,a symmetry LU-SGS implicit method is developed for numerical research on the asymmetry mechanism of fore-body vortex and active control by blowing near the tip.For avoiding the uncertainty of the transition models and turbulence models,the flows is simulated by solving 3D laminar Navier-Stokes equations.Based the numerical results and analysis,the present method do not generate asymmetry numerical errors,which makes it suitable for numerical research on the asymmetry separation mechanism of fo... |
| Keywords: | fore-body vortex blowing near the tip asymmetry separation flow mechanism |
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