| 乳胶气球浮力变化分析与垂直运动轨迹模拟 |
| Analysis of Buoyancy Change of Latex Balloon and Simulation of Vertical Trajectory |
| 投稿时间：2020-06-01 修订日期：2020-06-01 |
| DOI：10.12136/j.issn.1000-890X.2021.01.0017 |
| 中文关键词: 乳胶气球 浮力 垂直运动轨迹 气压差 温度差 浮重比 阻力系数 模拟 |
| 英文关键词: latex balloon buoyancy vertical trajectory pressure difference temperature difference buoyancy to weight ratio drag coefficient simulation |
| 基金项目:国家重点研发计划课题（2018YFC1506202） |
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| 中文摘要: |
| 基于理想气体状态方程，对乳胶气球的浮力进行计算推导，剖析气球内外气压差和昼夜浮升气体温度差对乳
胶气球浮力的影响，并进一步探索中性浮力高度与浮重比的关系。通过建立几何模型、大气模型和动力学模型，利用开
发的算法，结合施放试验数据，对乳胶气球升空过程中的垂直运动轨迹进行模拟预测。结果表明，当阻力系数为0. 45时，
模拟预测结果与试验测试结果的吻合性较好。 |
| 英文摘要: |
| 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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