Analysis of Trajectory and Thermal Performance during Descent Stage of High Altitude Scientific Balloons

Abstract

Abstract: Abstract： Considering the coupled relation between dynamics and thermodynamics, the trajectory and thermal performance of helium gas during the descent stage of high altitude scientific balloons were studied. The thermal model and vertical dynamic model of high altitude balloons were established, including the solar radiation model, the infrared radiation model, and the heat convection model. The trajectory and thermal performance of a balloon during the descent stage were simulated, including height, velocity, and volume and temperature of helium gas, while the variation regularity of parameters were analyzed. The research results show that the superheated phenomenon exits during the descent stage of balloons, state changing of superheated results in the changing of descent velocity, and changing of descent velocity results in the state changing of superheated. The discharge mass of helium gas in the initial stage has an important influence on descent velocity, descent time and superheated state. This paper can provide theoretical reference for design, flight test and application of high altitude balloons.

Key words: Key words： high altitude scientific balloon, descent stage, trajectory, thermal performance

CLC Number:

V 274

YANG Xixiang. Analysis of Trajectory and Thermal Performance during Descent Stage of High Altitude Scientific Balloons[J]. Journal of Shanghai Jiaotong University, 2016, 50(04): 608-612.

References

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