Thermal-Field Experimental Study of a Thin Circular Carbon-Fiber Tube in Stratosphere Environment

2011 ◽  
Vol 189-193 ◽  
pp. 1027-1030
Author(s):  
Fen Bo Pei ◽  
Guo Quan Tao ◽  
Zhe Wu
Keyword(s):  
Heat Transfer ◽  
Thermal Model ◽  
Thermal Field ◽  
Thermal State ◽  
Radiant Heat ◽  
Radiant Heat Transfer ◽  
The Sun ◽  
Coupling Problem ◽  
Whole Process ◽  
And Performance

The changeable, atrocious environment of stratosphere affects the capability and performance of the structure. An effective and economical approach used to analyze thermal state of stratospheric aerostat was investigated in this study. A simplified thermal model was built in environmental experiment which simulates stratosphere and takes radiation of the sun, air and earth. This model solved a coupling problem of heat conduction, heat convection and radiant heat transfer and obtained a pleasant result through numerical simulations of Fluent. The whole process makes great effect to further analysis and study of stratospheric structure.

Radiant Heat Transfer From Isothermal Dispersions With Isotropic Scattering

1967 ◽  
Vol 89 (4) ◽  
pp. 300-308 ◽  
Author(s):  
R. H. Edwards ◽  
R. P. Bobco
Keyword(s):  
Heat Transfer ◽  
Approximate Solutions ◽  
Radiant Heat ◽  
Second Order ◽  
Isotropic Scattering ◽  
Radiant Heat Transfer ◽  
Approximate Methods ◽  
First Order ◽  
Order Solution ◽  
Radiant Transfer

Two approximate methods are presented for making radiant heat-transfer computations from gray, isothermal dispersions which absorb, emit, and scatter isotropically. The integrodifferential equation of radiant transfer is solved using moment techniques to obtain a first-order solution. A second-order solution is found by iteration. The approximate solutions are compared to exact solutions found in the literature of astrophysics for the case of a plane-parallel geometry. The exact and approximate solutions are both expressed in terms of directional and hemispherical emissivities at a boundary. The comparison for a slab, which is neither optically thin nor thick (τ = 1), indicates that the second-order solution is accurate to within 10 percent for both directional and hemispherical properties. These results suggest that relatively simple techniques may be used to make design computations for more complex geometries and boundary conditions.

Sign in / Sign up

Export Citation Format

Share Document