航空学报 > 1991, Vol. 12 Issue (6): 217-222

凹半球降落伞模型起动载荷的研究

周民选1, 连淇祥2   

  1. 1. 南京宏光空降装备厂 ;2. 北京航空航天大学
  • 收稿日期:1989-12-11 修回日期:1990-06-20 出版日期:1991-06-25 发布日期:1991-06-25

THE INVESTIGATION OF THE DRAG FORCE OF THE RIGID HOLLOW HEMISPHERICAL PARACHUTE MODELS IN THE STARTING FLOW

Zhou Minxuan1, Lian Qixiang2   

  1. 1. Hongguang Aero-dropping Equipment Factory of Nanjing;2. Beijing University of Aeronautics, Astronautics
  • Received:1989-12-11 Revised:1990-06-20 Online:1991-06-25 Published:1991-06-25

摘要: 在用氢泡法观测凹半球降落伞模型的流场时,我们还用单分力应变天平对其进行了阻力测量。通过测量及理论分析,得出加速起动期间最大阻力F_(max)和附加质量引起的力F_a之比与无量纲参数U_(max)~2/ad之间的关系。此外,还研究了与最大阻力有联系的一些流动现象。该试验有助于深入了解降落伞的动稳定性与开伞动载方面的内在联系。

关键词: 降落伞, 非定常流, 阻力, 测量

Abstract: The drag of hollow hemispherical parachute models is measured by an one-component strain gauge balance, while the flow field is investigated by the hydrogen bubble technique. Based on the measures and the theoretical analysis, the relationship between the ratio of maximum drag Fmax to force Fa caused by added mass during uniform accelerations and nbn-dimensional parameter Umax2/ad is obtained. In addition the flowfield phenomena related to maximum drag is studied in the paper. The experiments will be helpful to realize the internal relation between the dynamic stability of parachute and the opening shock.

Key words: parachutes, unsteady flow, drag, measurement