超压气球上升过程温度与动力学特性仿真分析

针对带加强筋的超压气球,分析上升过程热环境及受力状态,建立热力学与动力学模型并分析其耦合关系。基于MATLAB开发仿真程序,对超压气球进行仿真分析。分析了气球上升过程中高度、速度、温度变化特性,数据表明上升过程中的热力学环境和动力学特性都对球内气体温度有重要影响,气球上升速度和球内气体温度相互耦合并与自由浮力系数存在相关性。飞行试验实测数据验证了仿真结果的准确性。理论分析结果和仿真模型可为后续超压气球设计和飞行试验提供指导。

Simulation and analysis of thermal and dynamic properties of super-pressure balloon during ascent

The thermal and dynamic properties of a pumpkin-shape super-pressure balloon with load tendons during ascent were studied. Thermal environment and forces were analyzed, and the thermal and dynamic models were proposed, and a simulation program was developed by using MATLAB. A simulation of a super-pressure balloon flight was conducted, the flight altitude, the ascent rate and temperature were analyzed during ascent. The results suggest that the thermal environment as well as the dynamic properties exert a great influence on the temperature of the Helium inside the balloon, the ascent rate and Helium temperature interact with each other, and both are relevant to the free lift ratio. The comparison between the simulation results and flight data reveal that the two sets of data match well. The theoretical analysis and simulation model are helpful in the super-pressure balloon design and mission planning.