摘要
运用单位半球法计算了地球辐射热流,并详细介绍了推导过程。由于给出微面元上地球辐射热流的解析表达形式,从而使计算凸面大气层外弹道式目标表面上的地球辐射热流变得非常简便。为了准确分析地球辐射对目标表面温度场的影响,利用有限元法建立了热传递模型。最后应用ANSYS软件计算了一种大气层外弹道式目标的表面温度场分布。数值计算表明:在目标飞行全程中,由于地球辐射的作用,目标绝大部分表面的温度变化范围在10 K以内。
The unit hemisphere method was used to calculate the earth heat flux, and the deduction procedure was introduced in detail. Due to the analytical form of the earth heat flux on a differential area, it is very convenient to calculate the earth flux on the convex exoatmospheric ballistic target. In order to analyze the influence of the earth radiation on the surface temperature field of the exoatmospheric ballistic target more accurately, the finite element method （FEM） was applied. At the end, the temperature fields of a kind of exoatmospheric ballistic target were calculated by ANSYS. The numerical results show that the temperature differences on most of the surface of the space target are less that 10 K under the influence of the earth radiation during the flight time.
出处
《红外技术》
CSCD
北大核心
2008年第4期187-191,共5页
Infrared Technology
基金
安徽省红外与低温等离子体重点实验室2007年开放基金(2007A012012F)
关键词
表面温度场
大气层外弹道式目标
地球辐射
有限元法
单位半球法
ANSYS
Surface temperature field
Exoatmospheric ballistic target
Earth radiation
Finite elementmethod
Unit hemisphere method
ANSYS
