| EPSRC Reference: |
GR/R27495/01 |
| Title: |
Inlet Conditions For Large Eddy Simulation of Premixed Turbulent Combustion |
| Principal Investigator: |
Tabor, Professor G |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Engineering Computer Science and Maths |
| Organisation: |
University of Exeter |
| Scheme: |
Fast Stream |
| Starts: |
01 December 2001 |
Ends: |
31 August 2005 |
Value (£): |
65,462
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| EPSRC Research Topic Classifications: |
| Combustion |
Fluid Dynamics |
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| EPSRC Industrial Sector Classifications: |
| Information Technologies |
Transport Systems and Vehicles |
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| Related Grants: |
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| Panel History: |
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Summary on Grant Application Form |
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Away from boundaries LES is a well-understood technique with little scope for improvement. However the implementation of boundary conditions causes major problems, because of the stochastic nature of the flow simulation. Hence: the flow at an inlet for an LES simulation has to include grid scale turbulent eddies, which can have a major impact on the properties of the flow downstream of the inlet. Surprisingly little effort has been put into this, yet correct characterisation of the flow at the inlet could significantly improve the quality of the simulation, particularly in cases such as combustion where there is a strong link between the turbulence and other aspects of the physics. There are two possible ways of approaching this. 1. to synthesise an inlet flow using some constrained random process. 2. to use a second, simpler simulation to generate input flow data. The project aims to implement novel examples of each into an LES code and test them on building-block flows such as fully-developed channel flow and flow over a backward facing step. The inlet conditions to be implemented are: based on a fourier series with random coefficients constrained to generate stated mean statistics (example of type 1), and based on calculation in a cyclic duct (example of type 2). It is planned also to investigate the use of wavelets to characterise the turbulent flow to generate inlet conditions (type 1). Finally the project will assess the impact of these inlet conditions on combustion in a simple geometry. The goal is to find inlet conditions that are sufficiently good to permit accurate calculation of engineering problems.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.ex.ac.uk |