摘要
基于两节点热力学模型,研究多层节点模型的平流层浮空器热特性分析方法.对美国国家航空航天局的超长航时气球的仿真结果表明:多层节点模型可给出囊体不同部位的温度分布及氦气温度随时间的变化规律;高空气球囊体顶部和底部的昼夜温差明显小于平流层飞艇内氦气的昼夜温差;高纬度飞行时的氦气温差更小,降低驻空高度可降低氦气温度.研究结果对平流层浮空器热控设计具有重要的参考价值.
In this paper, a multi-layer node model, which is based on the two-node model, is proposed for thermal analysis of aerostats. The thermal performance simulation of a National Aeronautics and Space Administration(NASA) ultra long duration balloon suggests that the multi-layer node model can provide the distribution of different envelope parts and the development of helium temperature tendency with time. It is found that the diurnal temperature variation between top envelop and bottom envelop is smaller than that of stratospheric airships. It is also concluded that a low helium temperature difference can be reached at a high latitude position and a low helium temperature can be reached at a low altitude. The conclusions are valuable for superheat control of stratospheric aerostats.
作者
邓小龙
麻震宇
杨希祥
朱炳杰
DENG Xiaolong;MA Zhenyu;YANG Xixiang;ZHU Binjie(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2020年第7期765-770,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金(51605484,61903369)
湖南省自然科学基金(2018JJ3587,2018JJ3590)资助项目。
关键词
平流层浮空器
热力学特性
多层节点模型
驻空过程
stratospheric aerostat
thermal characteristics
multi-layer node model
station-keeping
