Test investigation of the aerodynamic characteristics of grid fins for configuration with body and fins
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摘要: 对于不同类型的栅格翼，采取了一种模型设计简洁、克服了在较小试验模型上安装铰链力矩天平的困难，同时又能测量栅格翼全部气动力和力矩分量的试验方法，获得了简单框架式、正置蜂窝式以及不同网格密度的斜置蜂窝式4种栅格翼在弹身影响下的亚声速和跨声速气动特性，并与平板尾翼的气动特性进行了对比，同时研究了栅格翼在尾身组合体迎风侧和背风侧不同位置时的气动特性。结果表明：栅格翼与常规平板翼各有优缺点，栅格翼结构形式、网格密度和尺寸对其气动特性有重要影响，位置对不同类型栅格翼气动特性的影响也不尽相同。Abstract: A wind tunnel test program is designed to investigate aerodynamic characteristics of different grid fins in subsonic and transonic flows, which has advantages of simple model design, avoiding installation of hinge moment balance on small models, and obtaining all aerodynamic forces and moments of grid fins. The aerodynamic characteristics of grid fins are analyzed, including simple frame configuration, upright honeycomb configuration and skew honeycomb configuration with different grid densities. The aerodynamic characteristics of different grid fins and planar fins are compared, and the influence of grid fin location on its aerodynamic characteristics is also investigated. The results show that grid fins and planar fins have respective advantages and disadvantages; the configuration, grid densities, and size of grid fins have an important impact on their aerodynamic characteristics. For different grid fins, the influence of location on its aerodynamic characteristics is not the same.
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图 1 尾身组合体模型栅格翼测力方案示意图
Figure 1. Sketch of model with body and tail and force test of grid fin
图 3 1#位不同类型尾翼轴向力系数
Figure 3. Comparison of axis force coefficients for different fins at 1# location
图 4 1#位不同类型尾翼法向力系数
Figure 4. Comparison of normal force coefficients for different fins at 1# location
图 5 1#位不同类型尾翼铰链力矩系数
Figure 5. Comparison of hinge moment coefficients for different fins at 1# location
图 6 不同位置栅格翼气动特性对比(Ma=0.8,GF4+)
Figure 6. Comparison of aerodynamic characteristics for grid fin at different locations
图 7 不同位置栅格翼气动特性对比(Ma=0.8,GFX2)
Figure 7. Comparison of aerodynamic characteristics for grid fin at different locations
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