高速飞行离散杆的空气阻力效应

Effects of Air Resistance on Scattering Rod Flying at High Speed

研究了离散杆高速飞行过程所受到的空气阻力和空气阻力矩,包括沿杆体的轴向阻力、表面法向阻力,以及旋转阻力矩。在求解的过程中,将阻力和阻力矩转化为相应的阻力系数和阻力矩系数求解。根据分析,高速飞行离散杆的阻力系数主要为压强系数、摩阻系数、底部压强系数。通过等熵理论、能量守恒定律和普兰顿-梅耶尔流动理论推导出了三个阻力系数的理论公式,并通过计算实例显示各系数的变化。

The air resistance and the air resistance moment of the scattering rods flying at high speed are investigated in this paper, The air resistance and the air resistance moment include axial air resistance, normal resistance on the surface and air resistance rotary moment, They are solved by inverting them into corresponding resistance factors and resistance moment factors. By analyzing, the pressure factor, the frictional factor and the base pressure factor are major resistance factors. The theoretical formulas of the three factors are derived by applying the theory of equal caloric, the law of the conservation of energy and the Plant-Meyel fluxion theory, and the numerical results can show clearly the variations of the factors with air speed and the rod structure.