) 上海交通大学 航空航天学院, 上海 200240
收稿日期:2019-02-15出版日期:2021-07-28发布日期:2021-07-30通讯作者:王晓亮E-mail:wangxiaoliang@sjtu.edu.cn作者简介:程 晨(1994-),女,湖北省黄石市人,硕士生,从事浮空器热特性等研究基金资助:国家自然科学基金(61733017);上海市自然科学基金(18ZR1419000)Thermal Dynamic Model and Thermal Characteristics of Airships Considering Skin Transmittance
CHENG Chen, WANG Xiaoliang() School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China
Received:2019-02-15Online:2021-07-28Published:2021-07-30Contact:WANG Xiaoliang E-mail:wangxiaoliang@sjtu.edu.cn摘要/Abstract
摘要： 以平流层飞艇为研究对象,在考虑飞艇表面蒙皮的透射特性以及内部填充气体对辐射的吸收率与发射率的基础上,推导出飞艇表面蒙皮及内部填充气体的热力学方程.通过有限拆分法建立了考虑蒙皮透射率的飞艇热力学仿真模型,并分析比较了典型蒙皮材料下飞艇的热力学特性.通过将飞艇外形建模和表面离散化处理,针对每个单元和内部填充气体进行瞬态热特性数值计算,分析了仿真模型中网格划分及时间步长对计算结果的影响.通过相关实验数据对所建立的模型及其求解方法的可靠有效性进行了验证,分析比较了不同特性蒙皮材料的飞艇热特性及其变化规律.
关键词: 飞艇, 透射率, 热特性, 平流层, 数值计算
Abstract: Taking stratospheric airship as the research object, considering the transmission characteristics of the airship surface and the absorption rate and emissivity of the inner filling gas to radiation, the thermodynamic equations of the airship surface skin and inner filling gas are deduced. The thermodynamic simulation model of the airship considering the transmittance of the skin is established by using the sub-method, and the thermodynamic characteristics of airship under typical skin materials are analyzed and compared. Through airship shape modeling and surface discretization, the transient thermal characteristics of each unit and internal gas are calculated, and the influence of the mesh division and time step in the simulation model on the calculation results is analyzed. The data verifies the reliability and validity of the established model and its solution method, and the thermal characteristics and the changing laws of airships with different characteristics of skin materials are analyzed and compared.
Key words: airship, transmittance, thermal characteristics, stratosphere, numerical calculation
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