Details of Grant 

EPSRC Reference:	GR/R69792/01
Title:	COMBUSTION MODEL DEVELOPMENT FOR LARGE-EDDY SIMULATION OF NON-PREMIXED REACTIVE FLOWS
Principal Investigator:	Kronenburg, Professor A
Other Investigators:	Jones, Professor W
Researcher Co-Investigators:
Project Partners:	Advantica Technologies Ltd
Department:	Mechanical Engineering
Organisation:	Imperial College London
Scheme:	Standard Research (Pre-FEC)
Starts:	01 October 2002	Ends:	30 November 2005	Value (£):	232,171
EPSRC Research Topic Classifications:	Combustion
EPSRC Industrial Sector Classifications:	Energy No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
Large-eddy simulation (LES) holds the largest potential of all present fluid dynamics models to predict accurately complex turbulent flows in the fore-seeable future. It is far from being clear, however, how LES can be efficiently applied to turbulent reacting flows at reasonable computational cost. Some very recent studies have led to promising predictions of free jet flames using LES, but they all use restrictive assumptions that prevent general applications to more complex flows. The aim of the proposed research is to dive conditionally filtered reactive species transport equations for large-eddy simulations and to examine the suitability of the conditional moment closure (CIVIC) method as a combustion sub-model for LES methods for non-premixed combustion systems. The present study will focus on the importance of the sub-grid scales in the conditionally filtered transport equations and assess the appropriate models for closure. There is a clear need to minimize computer requirements of the relatively costly LES. Therefore, the research will address issues like weak spatial and potentially temporal- variation of conditional moments and we will exploit these CIVIC characteristics by lower -and cheaper- grid resolution for the conditional transport equations. The model will be validated by comparison with experimental data from turbulent jet diffusion flames. The applicability of the method to more complex flame geometries will be shown by computation of a bluff-body stabilized turbulent diffusion flame.
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