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Fouling of combustion chambers and high temperature filters

Objective

The project requires both experimental and theoretical studies of a furnace
configuration and a high temperature filtration system. Work will therefore be carried out in the three related areas of furnace modelling, fouling of furnace surfaces and fouling of filters.
To improve the accuracy of the calculations for heat release and fouling within a furnace and the heat available at the furnace exit, two new aspects must be added to existing modelling approaches. The furnace studies
calculations will be undertaken using a general model for the bulk flow, based on computational fluid dynamics (CFD) codes, and another model optimised for the wall region. The latter will be based on the "absence of turbulence model" using a Direct Numerical Simulation (DNS) approach which eliminates the need for nonuniversal "wall functions". New models to predict deposition rates for furnace walls and high temperature filters will be developed. These will be derived from theoretical and analytic studies in combination with experimental and CFD exercises to provide the necessary data and parameters for industrial plant. Methods will be developed based on scaling laws of multifractal geometry and appropriate Newtonian approximations, to provide calculations of properties of deposits for furnaces and high temperature filters. Conventional Newtonian methods often produce inadequate approximations and are very computer intensive in time, but the properties are required for the heat transfer and other calculations.
For the combustion chamber fouling section of the project, the results will be validated by direct comparison with operating industrial plant data obtained as part of the project. A similar validation will be carried out for the filter studies, again using data obtained from industrial plant.

The project requires both experimental and theoretical studies f a furnace configuration and a high temperature filtration ystem. Work will therefore be carried out in the three related areas of furnace modelling, fouling of furnace surfaces and ouling of filters. To improve the accuracy of the calculations for heat release and ouling within a furnace and the heat available at the furnace exit, two new aspects must be added to existing modelling approaches.
The furnace studies calculations will be undertaken sing a general model for the bulk flow, based on computational luid dynamics (CFD) codes, and another model optimised for the all region. The latter will be based on the "absence of urbulence model" using a Direct Numerical Simulation (DNS) pproach which eliminates the need for non
models to predict deposition rates for furnace walls and high emperature filters will be developed. These will be derived from heoretical and analytic studies in combination with experimental nd CFD exercises to provide the necessary data and parameters or industrial plant. Methods will be developed based on scaling laws of multi
appropriate Newtonian approximations, to provide alculations of properties of deposits for furnaces and high emperature filters. Conventional Newtonian methods often produce nadequate approximations and are very computer intensive in ime, but the properties are required for the heat transfer and ther calculations.For the combustion chamber fouling section of the project, the esults will be validated by direct comparison with operating ndustrial plant data obtained as part of the project. A similar alidation will be carried out for the filter studies, again sing data obtained from industrial plant.

Funding Scheme

CSC - Cost-sharing contracts
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Coordinator

National Engineering and Assessment Group Ltd
Address
Scottish Enterprise Techical Park
G15 0QR Glasgow
United Kingdom

Participants (4)

Commissariat à l'Energie Atomique (CEA)
France
Address
Centre D'études De Grenoble
38041 Grenoble
GLASGOW CALEDONIAN UNIVERSITY
United Kingdom
Address
Cowcaddens Road, 70, City Campus
G4 0BA Glasgow
INSTITUTO SUPERIOR TECNICO
Portugal
Address
1,Avenida Rovisco Pais 1
1049-001 Lisboa
International Combustion Ltd.
United Kingdom
Address
Sinfin Lane
DE24 9GJ Derby