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Han Y.-H.,Beihang University | Han Y.-H.,Army Aviation Institute | Yang C.-X.,Beihang University | Xu X.-D.,Institute of Aerial Equipment
Hangkong Dongli Xuebao/Journal of Aerospace Power | Year: 2012

To calculate clusters' aerodynamic characteristics for a certain type of disaster relief airdrop system, multi-node statics model of cross parachute system was developed to calculate the aerodynamic shape of canopy. Different cross parachute models were numerically simulated with different canopy arm ratios and suspension line ratios, and the numerical results were compared with test results in literature. According to this model, and aerodynamic shape was obtained for cross parachute clusters, and aerodynamic characteristics were simulated. The results show that: the calculated results and wind tunnel test results in literature are in good agreement, and the multi-node statics model is accurate and feasible. As canopy arm ratio and suspension line ratio of cross parachute increase, the axial force increases; as the angle of attack increases, the axial force firstly decreases and then increases, whereas the normal force increases. This model can be used for calculating aerodynamic shape of parachute clusters, which is also useful for parachute system design.

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