超压气球飞行过程热特性数值研究  

Numerical Simulation Study on Thermal Characteristic of Super-Pressure Balloons in Flight

作　　者：李小建[1] 关堂新 李大鹏[1] 

机构地区：[1]中国电子科技集团公司第三十八研究所浮空平台部,安徽合肥230088 [2]海军驻合肥地区军事代表室,安徽合肥230088

出　　处：《西安航空学院学报》2016年第3期6-11,共6页Journal of Xi’an Aeronautical Institute

摘　　要：在分析超压气球几何外形、内外热环境和受力等情况的基础上,建立了超压气球几何、热力学和运动学模型。基于该模型,对超压气球上升-驻空过程进行了仿真模拟,得到超压气球飞行高度、内部氦气温度、氦气内外超压、气球体积以及气球飞行速度随时间的变化规律。结果表明:气球在上升过程中,氦气存在严重的"超冷"现象,而在驻空过程中,出现严重的"超热"现象。升速度曲线呈"W"型变化;中午过后,随着太阳辐射的减弱,氦气温度开始下降,但驻空高度维持不变。研究结果为超压气球的设计和研究提供了重要的依据,更好地保证气球在飞行期间的运行安全。This paper establishes the geometrical,thermodynamic and motion models of the super-pressure balloon on the basis of detailed analysis of geometrical shape,internal and external thermal environment,and force.Based on the mathematical models,the flight performance during the ascending-floating processes of a super-pressure balloon are simulated,the variations of the flight velocity and height of the balloon,the inner gas temperatures and overpressure,and the volume of the balloon are investigated.The results indicate that the inner gas temperature presented 'supercool' during the ascending process and presented serious 'superheat' during the floating processes.Due to 'supercool',the ascending velocity profile assumes ' W' shape.After noontime,the temperature of the inner gas starts to fall with the solar radiation reduction.However,the flight altitudes of the balloon remain unchanged.The research findings are helpful for the design and research of super-pressure balloons and ensuring the operation safety during the flight.

关 键 词：超压气球 几何模型 热力学模型 运动模型 数值仿真 

分 类 号：V273[航空宇航科学与技术—飞行器设计]