Application of the Local Estimation Methods to Calculate the Radiant Intensity of a High-Temperature Jet

The article describes the statistical algorithms for calculating scattered radiation by the Monte Carlo method. Emphasis is on calculating light scattering in a medium with distributed volumetric radiation sources, for which an object was chosen in the form of an axisymmetric gas volume simulating a...

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Bibliographic Details
Published in:High temperature 2022-10, Vol.60 (5), p.688-698
Main Author: Grigoriev, I. S.
Format: Article
Language:English
Subjects:
Aircraft engines
Algorithms
Atoms and Molecules in Strong Fields
Classical and Continuum Physics
Heat and Mass Transfer and Physical Gasdynamics
High temperature
Industrial Chemistry/Chemical Engineering
Laser Matter Interaction
Materials Science
Mathematical analysis
Microprocessors
Monte Carlo simulation
Physical Chemistry
Physics
Physics and Astronomy
Radiation sources
Radiative transfer
Scattering
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Summary:The article describes the statistical algorithms for calculating scattered radiation by the Monte Carlo method. Emphasis is on calculating light scattering in a medium with distributed volumetric radiation sources, for which an object was chosen in the form of an axisymmetric gas volume simulating an aircraft engine jet with nonuniform temperature and concentration distributions of the scattering particles. The theory of three Monte Carlo algorithms and their implementation on a graphics processor are demonstrated: the direct method of tracking photon trajectories and methods based on expansion in a Neumann series of solutions to the direct and adjoint radiative transfer equations (local estimates), taking into account weight modifications and various scattering indicatrices. Visual comparison of the operation of the algorithms is facilitated by presenting the data as the functional of the radiation rate and the area of the radiating surface (radiant intensity).
ISSN:0018-151X
1608-3156
DOI:10.1134/S0018151X22050054