STUDY OF MINIMAL EFFECTIVE REEFING RATIO BASED ON AN EMPIRICAL FORMULA AND FLUID-STRUCTURE-INTERACTION METHOD

作     者：Zhao, Xiaoshun Yang, Xue Yu, Li Liu, Xin Wang, Jingjing 

作者机构：Nanjing Univ Aeronaut & Astronaut Coll Aerosp Engn Nanjing Jiangsu Peoples R China 

出 版 物：《AVIATION》 (航空)

年 卷 期：2018年第22卷第4期

页      面：136-142页

核心收录：

学科分类：08[工学] 0825[工学-航空宇航科学与技术] 

主　　题：reefed parachute system fluid-structure interaction reefing ratio empirical formula numerical simulation 

摘      要：The reefing ratio for the first stage of a parachute limits the reefing ratio for the subsequent stages, so its minimal effective value is very important. In this paper, an empirical formula is derived to calculate the minimal effective reefing ratio. The empirical parameters are obtained by the arbitrary Lagrangian-Eulerian/fluid-structure interaction (ALE/FSI) method. By using the FSI method, the typical flow and structure fields of effective and ineffective reefed parachutes are revealed. The numerical results including drag characteristics and final shape are very consistent with wind tunnel tests. The curves of the empirical parameters with reefing ratios are obtained. The minimal effective reefing ratio obtained by the empirical formula is consistent with that of the numerical results, which shows that the empirical formula has high accuracy.