基于拼接网格的栅格舵动态特性数值模拟研究  

Numerical simulation about grid fin′s dynamic characteristic by patched mesh

作　　者：陈建中[1,2] 张兆[2] 黄国川[2] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]中国空气动力研究与发展中心高速所,四川绵阳621000

出　　处：《空气动力学学报》2013年第5期652-656,共5页Acta Aerodynamica Sinica

摘　　要：采用基于拼接混合网格的数值计算方法,模拟了栅格舵在不同马赫数下的静态、动态气动特性,计算结果与试验的一致性说明了所采用的数值方法的有效性。通过模拟发现栅格舵的气动焦点随马赫数先向上游移动然后再向下游移动;栅格舵在不同速域下的非定常俯仰迟滞现象均不明显。Grid fins are nonconventional aerodynamic control surfaces, which are made of a frame sup porting lifting surfaces positioned in the form of a lattice. Grid fins are being investigated by other countries for aerodynamic control of highly maneuverable air-launched weapons due to their advantage over convention- al planar controls at high angles of attack and high Mach numbers. Since their good performance in aerody- namical characteristic, the grid fins have been researched and used in aeronautic and astronautic industry widely. Here, the numerical method based on the patched hybrid mesh is employed to simulate grid fins＇ static and dynamic aerodynamic characteristics at different Mach numbers. The validity of this numerical method used here has been proved by the coincidence between the numerical and experimental results. By an alyzing the numerical results, while the testing Mach number increasing, the aerodynamic centre of grid fins move upstream at first, then moves downstream. Moreover, it has been noticed during the dynamic numeri- cal test that there are little unsteady retarding phenomena of grid fin＇s oscillation in different speed ranges.

关 键 词：栅格舵 拼接混合网格 非定常迟滞 动态特性 俯仰振荡 

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]