Measurement of radiation in complex geometries and comparison with calculational techniques
Jose S. De Almeida
2134/36072
https://repository.lboro.ac.uk/articles/thesis/Measurement_of_radiation_in_complex_geometries_and_comparison_with_calculational_techniques/9535463
During the development of flight tests of a spacecraft, heat exchange occurs
among the many physically separated subsystem surfaces through the phenomenon of
thermal radiation. Considering the increasing complexity of the geometrical forms and
shapes in the design of such systems, the monitoring and control of the radiative heat
fluxes taking place in the multi-reflecting, absorbing and emitting heat transfer
environment are very critical. Because the analytical solution of thermal radiation in such
geometrically complex three-dimensional systems is not practical, extensive numerical
modelling techniques are widely used to predict radiative heat fluxes on the many
thermally active surfaces. From experience, it is found that this can be very difficult and
not at all commensurate with fast feedback unless the analysis is from a simple system
layout.
Considering that a relatively new approach dedicated to the basic analysis of
radiative heat flux has been developed by the heat transfer community as a numerical
approximation called the Discrete Ordinates Method (DOM), a first question did arise in
terms of how well an enhanced and more comprehensive formulation based on this
concept would fulfil the task of achieving faster results whilst still accurately predicting
radiative heat transfer in three-dimensional, more complex geometries. [Continues.]
2018-11-19 15:21:14
untagged
Mechanical Engineering not elsewhere classified