乳胶气球浮力变化分析与垂直运动轨迹模拟

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.