翼弦格宽比对栅格翼组合体气动特性影响的数值研究
首发时间:2009-04-08
摘要:翼弦格宽比是影响栅格翼气动特性的一个重要几何参数,为寻求亚跨音速阶段内栅格翼的最佳翼弦格宽比,本文首先用风洞试验的方法得出其中一个翼弦格宽比栅格翼滑翔增程弹的气动数据,并与数值模拟的结果相比较,验证了数值计算中网格生成的有效性,然后对4种不同翼弦格宽比的栅格翼组合体在亚跨音速条件下的气动特性进行了研究。结果显示,亚跨音速阶段格栅翼的翼弦格宽比在1.2时气动特性最好,为在亚跨音速下进行提高栅格翼滑翔增程弹气动特性的风洞研究提供了参考。
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CFD Investigation on the efects of chord to width ratio on the aerodynamic characteristics of bodies with grid fins
Abstract:The chord to width ratio of grid fin was an important parameter influencing the aerodynamics of grid fins. In order to research the aerodynamic characteristics of grid fins effected by chord to width ratio, the grid fins of one chord to width ratio were adapted in wind tunnel experiments,compared with the data of CFD,improved the effectiveness of grid generating,then investigated on the effects of four different chord to width ratios bring to aerodynamic characteristics of missile with grid fins in the subsonic/transonic flow regime by the method of CFD. The results indicate that we could find out the ratio of chord to width of optimal aerodynamic characteristics,and this ratio is 1.2, which provides useful imformations for the wind tunnel investigation about glide long-range missile with grid fin at subsonic/transonic speeds.
Keywords: width to chord ratio;grid fins;wind tunnel numerical calculation
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No.3119021593512391****
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