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- W3201110354 abstract "The advanced 3D-coal combustion code AIOLOS for quasi-stationary turbulent reacting flows is based on a conservative finite-volume procedure. Equations for the conservation of mass, momentum and scalar quantities are solved. In order to deal with pressurized combustion chambers which are usually of cylindrical shape, a first task in the frame of the project consisted in the extension of the code towards cylindrical co-ordinates, since the basic version of AIOLOS was only suitable for cartesian grids. Furthermore, the domain decomposition method was extended to the new co-ordinate system. Its advantage consists in the possibility to introduce refined sub-grids, providing a better resolution of regions where high gradients occur (e.g. high velocity and temperature gradients near the burners). The accuracy of the code was proven by means of a small-scale test case. The results obtained with AIOLOS were compared with the predictions of the commercial CFD-code FLOW3D and validated against the velocity and temperature distributions measured at the test facility. The work during the second period focused mainly on the extension of the reaction model, as well as on the modelling of the optical properties of the flue gas. A modified submodel for char burnout was developed, considering the influence of pressure on diffusion mechanisms and on the chemical reaction at the char particle. The goal during the third project period was to improve the numerical description of turbulence effects and of the radiative heat transfer, in order to obtain an adequate modelling of the complex processes in pressurized coal combustion furnaces. Therefore, a differential Reynolds stress turbulence model (RSM) and a Discrete-Ordinates radiation model were implemented, respectively. 13 refs., 13 figs., 1 tab." @default.
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- W3201110354 date "1998-12-31" @default.
- W3201110354 modified "2023-09-24" @default.
- W3201110354 title "Development and validation of mathematical modelling for pressurised combustion" @default.
- W3201110354 hasPublicationYear "1998" @default.
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