不规则椭球体在流场中的速度和压力研究

RESEARCH ON VELOCITY AND PRESSURE OF ABNORMITY ELLIPSOID IN FLOW FIELD

推导了不规则椭球体在理想流场中速度势和流函数,通过迭代的方法求出了流体在物体表面的速度和压力分布。采用此方法得到的国外软式飞艇头锥直径与实际值比较吻合。计算了不同速度和不同高度下飞艇头部压差力的大小和头锥的直径。结果表明,飞艇在低空应该保持较低速度,只有在高空才能运行最大速度。

The velocity potential and stream function of abnormity ellipsoid are deduced in flow field. According to iterative method, the velocity and pressure of fluid above the ellipsoid are derived. For the foreign airship, the results of the wimble diameters show the good agreement with the factual observations. Computing the head pressure difference and wimble diameter in different velocity and height, the results show that the flying airship should keep lower speed in low altitude and used the max speed only in high altitude.