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本文选用杆径为弹径的0.3倍的杆形头部模型和杆形头部加圆柱模型作为基本模型,变化杆长,通过风洞实验获得基本的气动力数据,这包括前阻、底阻、法向力和压心随杆长的变化。然后,改变杆径、钝面形状及杆的形状,研究诸参数对前阻、底阻、法向力及压心的影响,并就流场变化及作用机理进行了比较深入的分析。文内系统地提供了气动力系数随几何参数的变化曲线,可为杆形头部弹的气动力工程估算应用.同时,为杆形头部弹的总体设计及全面的考虑气动力布局提供依据.实验马赫数范围从0.6～4.0.
In this paper, the rod-shaped head model with rod diameter of 0.3 times the rod diameter and the rod-head model with cylindrical model were selected as the basic model. The length of the rod was changed and the basic aerodynamic data were obtained through wind tunnel experiment. , Normal force and pressure with the bar length changes. Then the rod diameter, the shape of the blunt surface and the shape of the rod were changed. The influence of the parameters on the front resistance, the bottom resistance, the normal force and the pressure center were studied. The flow field and the mechanism of action were analyzed in depth. This paper systematically provides the curve of aerodynamic coefficient with geometric parameters, which can be used to estimate the aerodynamic engineering of rod-shaped head bullets.At the same time, it provides the basis for the overall design of rod-shaped head bullets and the comprehensive consideration of aerodynamic layout The experimental Mach number ranged from 0.6 to 4.0.