| Analysis of Buoyancy Change of Latex Balloon and Simulation of Vertical Trajectory |
| Received:June 01, 2020 Revised:June 01, 2020 |
| DOI：10.12136/j.issn.1000-890X.2021.01.0017 |
| Key Words: latex balloon；buoyancy；vertical trajectory；pressure difference；temperature difference； buoyancy to weight ratio；drag coefficient；simulation |
| Author Name | Affiliation | E-mail | | ZHU Huajian* | Beijing University of Chemical Technology | 824239418@qq.com | | LI Fanzhu* | Beijing University of Chemical Technology | lifanzhu@mail. buct. edu. cn | | SHEN Zhipeng | Hunan Key Laboratory of Near-space Meteo-ballon Materials and Technology，Zhuzhou Rubber Research & Design Institute Co. ，Ltd of ChemChina | | | HE Hong* | Beijing University of Chemical Technology | hehong@mail. buct. edu. cn | | XIAO Di’e | Hunan Key Laboratory of Near-space Meteo-ballon Materials and Technology，Zhuzhou Rubber Research & Design Institute Co.，Ltd of ChemChina | | | ZHANG Liqun | Beijing University of Chemical Technology | |
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| Abstract: |
| Based on the ideal gas equation of state，the buoyancy of the latex balloon was calculated and
deduced，and the effects of the air pressure difference inside and outside latex balloon and the temperature
fluctuation of the lift gas between day and night on the buoyancy of the latex balloon were analyzed. The
relationship between the equilibration height and buoyancy to weight ratio was also studied. By establishing
geometric model，atmospheric model and dynamic model，using the developed algorithm and release
experimental test data，the vertical trajectory of the latex balloon during the lift-off process was simulated
and predicted. It was found that，when the drag coefficient was 0. 45，the simulated prediction results were in
good agreement with the experimental test results. |
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