Parachute canopy ventilation speed obtaining method

The invention relates to a parachute canopy ventilation speed obtaining method. Various factors such as surrounding airflow attributes in the high-altitude flight process of a parachute, parachute flight speed and fabric microstructure characteristics are comprehensively considered. Based on a porous medium theory and a parachute canopy differential pressure-flight dynamic pressure equation in theparachute working process, the parachute canopy ventilation speed at any speed-height in the high-altitude flight process of the parachute can be rapidly calculated, and therefore guidance is provided for further calculation of the total ventilation amount of the parachute and design of the parachute. The whole technical scheme design does not need to pass a fabric air permeability test, a brandnew design scheme is adopted, and the obtaining efficiency of the target parachute canopy ventilation speed can be effectively improved. 本发明涉及一种降落伞伞衣透气速度获得方法，综合考虑了降落伞高空飞行过程中的周围气流属性、降落伞飞行速度、以及织物细观结构特点等多种因素，基于多孔介质理论和降落伞工作过程的伞衣压差