Thermodynamic model and numerical simulation of high altitude balloon ascending process

被引：0

作者：

Lü, Mingyun ^{[1
]}

Wu, Zichun ^{[1
]}

机构：

[1] School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

来源：

Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics | 2011年 / 37卷 / 05期

关键词：

Heat radiation - Flight simulators - Helium - Supercooling - Temperature - Dynamic models;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Based on the analysis of the high-altitude balloon thermodynamic environment, a coupling dynamic model was established to describe its thermodynamics and kinetics. The model was used to simulate the ascending and floating processes of a high altitude balloon. The results show that the inner helium temperature will present supercool during its ascending process, and supercool is more pronounced during the stratosphere region, with the inner helium temperature 19K below the surrounding air temperature. Because of supercool, its ascending velocity profile take on double V shape. The inner helium temperature presents superheat during the daytime floating process due to strong sun radiation and weak convection with air, and the inner helium average temperature is 39K higher than that of the surrounding air, with 648.8Pa super-pressure. The ascending velocity profile and inner helium temperature profile of the numerical simulation good agreement with experimental flight data shows that the established model is accurate.

引用

页码：505 / 509