CAJ | 학술논문

针对系留气球缆绳因严重损伤或遭遇强风而断裂的极端情况，建立了系留气球脱系后升空的动力学和热力学模型，并设计出了仿真软件。运用该仿真软件对系留气球脱系状态下的动力学特性和热特性进行了仿真研究，获得了阻力系数、脱系瞬间净浮力和阀门特性对气球下降速度和气囊超压的影响关系。结果表明：下降速度的主要影响因素是阻力系数，脱系瞬间净浮力和阀门特性对下降速度的影响有限；气囊超压的主要影响因素是阻力系数、脱系瞬间净浮力和阀门特性。
침대계류기구람승인엄중손상혹조우강풍이단렬적겁단정황，건립료계류기구탈계후승공적동역학화열역학모형，병설계출료방진연건。운용해방진연건대계류기구탈계상태하적동역학특성화열특성진행료방진연구，획득료조력계수、탈계순간정부력화벌문특성대기구하강속도화기낭초압적영향관계。결과표명：하강속도적주요영향인소시조력계수，탈계순간정부력화벌문특성대하강속도적영향유한；기낭초압적주요영향인소시조력계수、탈계순간정부력화벌문특성。
The tethered balloon may break away due to severe abrasion or strong wind. To learn the flight character-istics of tethered balloons after breakaway, the coupled dynamic and thermal models were established. Based on which a computer program was developed to simulate the dynamic and thermal characteristics of the breakaway of tethered balloons, thus the effects of drag coefficient, instantaneous net buoyancy and discharge valve characteris-tics on descent velocity and overpressure were obtained. The simulation results show that the drag coefficient is the major effect that affects the descent velocity. The effects of instantaneous net buoyancy and discharge valve charac-teristics on descent velocity are small and can be neglected. While drag coefficient, instantaneous net buoyancy and discharge valve characteristics are the major effects that affect the hull overpressure.