基于相似准则函数理论综合法的飘带伞阻力系数计算与分析

Calculation and Analysis on Drag Coefficient of Ribbon-Parachute by Synthetic Method Based on Similarity Criterion

针对柔性飘带与金属伞帽组成的新结构飘带伞,通过综合法求解其阻力系数.基于相似准则的函数理论,在考虑子弹流场干扰的基础上,借助Fluent软件数值仿真,基于仿真试验设计,建立了求解伞帽阻力系数的经验公式,结合已有的风洞试验数据建立了飘带伞阻力系数计算的经验公式,同时获得了兼顾多个主控因素影响的气动参数综合求解方法.该方法与建立的经验公式可为相关研究提供参考.

This paper is to calculate the drag coefficient of a new structural parachute which is composed of flexible ribbon and metallic canopy by using synthetic method. Based on the similarity theory, the empirical formula to calculate the drag coefficient of the canopy was established with the aid of Fluent simulation. The interaction of the flow around the bomb was also considered. Then, the empirical formula to calculate the drag coefficient of the ribbon- parachute was established on the basis of wind tunnel test data. In addition, a method to determine the balanced aerodynamic parameters affected by a number of factors could be found out. The presented approach and empirical formula could be referred for further research.