scholarly journals Numerical Simulation Study of the Influence of Ceiling Materials to Roof Radiation Heat Exchange

2012 ◽  
Author(s):  
Songtao Hu ◽  
Feng Qi ◽  
Teng Xie ◽  
Xinxin Wang ◽  
Gang Wang
Keyword(s):  
Numerical Simulation ◽  
Heat Exchange ◽  
Simulation Study ◽  
Radiation Heat ◽  
Radiation Heat Exchange

Numerical Simulation Study of the Influence of Ceiling Materials to Roof Radiation Heat Exchange

2013 ◽  
Vol 756-759 ◽  
pp. 198-202
Author(s):  
Song Tao Hu ◽  
Feng Qi ◽  
Teng Xie ◽  
Xin Xin Wang ◽  
Gang Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Thermal Properties ◽  
Heat Exchange ◽  
Simulation Study ◽  
Theoretical Basis ◽  
Radiation Heat ◽  
Radiation Heat Exchange ◽  
Cfd Numerical Simulation

This article focuses on the study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.

scholarly journals Numerical modeling of radiation heat exchange in combustion chambers and heat exchangers of power installations

2020 ◽  
Vol 209 ◽  
pp. 03018
Author(s):  
Nikolay Moskalenko ◽  
Ibragim Dodov ◽  
Azat Akhmetshin
Keyword(s):  
Numerical Modeling ◽  
Heat Exchange ◽  
Radiation Heat Transfer ◽  
Combustion Products ◽  
Spectral Lines ◽  
Spectral Transmission ◽  
Radiation Heat ◽  
Combustion Chambers ◽  
Two Phase ◽  
Radiation Heat Exchange

The application of numerical modeling is considered to solve the problems of radiation heat exchange in structurally inhomogeneous two-phase media which are realized during the combustion of fuel in boiler units atmospheric emissions from air carriers when they move at supersonic speeds. The optically active ingredients of the gas phase of the combustion products have a sharp selection of spectral absorption lines (radiation) which causes a difference in the spectral transmission functions for selective radiation from the spectral transmission functions for non-selective radiation (gray body). In the presence of a dispersed phase of the combustion products acute selection is subjected to such a parameter of the radiation propagation medium as the probability of quantum survival. The number of spectral lines determining the spectral transmission functions increases with temperature and is determined by hundreds of thousands of lines at high temperatures. In this paper we consider a closed simulation of radiation heat transfer in combustion chambers when the temperature field in the combustion chambers is calculated first and then the flux of thermal radiation to the tube heat-receiving surfaces.

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