高超声速带减阻杆钝头体绕流非定常现象数值模拟  

Numerical Simulation of Hypersonic Unsteady Flow Around a Spiked Blunt-Body

作　　者：马宇[1] 刘晓伟[1] 冯家波[1] 熊红亮[1] 欧平[1] 

机构地区：[1]中国航天空气动力技术研究院,北京100074

出　　处：《弹箭与制导学报》2014年第3期146-150,共5页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：带减阻钝物体绕流有很强的非定常流动特征,给飞行器减阻和头部热防护都带来了不利影响,为探索这一周期性非定常流动的演变规律及其对飞行器阻力的影响,文中利用Fluent软件对高超声速下的这一现象进行了数值计算模拟研究,针对流动周期的3个不同阶段:坍缩阶段、膨胀阶段和抑制阶段,分别进行了流场结构和流动机理的详细论述,另外还与飞行器模型的阻力曲线相对应,得到了流场结构变化的不同阶段与阻力曲线间的对应关系。Strong unsteady flow of flow field around the spiked blunt-body has negative effect on drag reduction of vehicle and thermal pro- tection of the head. In order to study the evolution of this periodic unsteady flow and the effect on the drag of the vehicle, the hypersonic flow was numerically simulated by using Fluent package, and the flow structure and mechanism of the three processes of one cycle： col- lapse, inflation and suppression, were discussed in detail. The correspondence between the drag coefficient curve and different flow strnc-ture was obtained, also.

关 键 词：高超音速 非定常 减阻杆 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]