Prokhorov, A.
, Mekhontsev, S.
and Hanssen, L.
(2004),
Emissivity Modeling of Thermal Radiation Sources With Concentric Grooves, High Temperatures - High Pressures
(Accessed September 21, 2023)
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Emissivity Modeling of Thermal Radiation Sources With Concentric Grooves
Published
Author(s)
A Prokhorov, ,
Abstract
Monte Carlo based specialized software has been applied to the statistical modeling of effective emissivity of radiators with concentric grooves of trapezoidal and triangular profile. A specular-diffuse model is used in which the thermal emission from the walls obeys Lambert's Cosine law, and reflection may haveboth specular and diffuse (Lambertian) components. The angular dependences of effective emissivity of a radiator with concentric triangular and trapezoidal grooves are computed for various values of the diffuse component. Grooves with isothermal and non-isothermal walls are modeled. It is shown that a temperaturedrop towards the peak of a groove might lead to substantially decreased effective emissivity. An example of a modeling result for a grooved radiator with reflector enhancement is presented.Citation
High Temperatures - High Pressures
Volume
35 / 36
Issue
No. 2
Pub Type
Journals
Keywords
Blackbody, effective emissivity, Monte-Carlo method, numerical modeling, reflectance, temperature distribution, V-grooves
Citation
Created June 30, 2004, Updated October 12, 2021