Fundamental understanding of turbulent flame propagation in droplet-laden reactant mixture based on experimental and numerical investigations

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Title
Fundamental understanding of turbulent flame propagation in droplet-laden reactant mixture based on experimental and numerical investigations

CoPED ID
ed35832e-d628-45a0-895c-362b7e35f433

Status
Closed

Funders

Value
£438,944

Start Date
Jan. 1, 2013

End Date
Dec. 31, 2015

Description

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This project aims to investigate the statistical behaviour of turbulent flame propagation in a droplet-laden mixture using both experiments and Direct Numerical Simulations (DNS). The effects of turbulence intensity, integral length scale of turbulence, group number, volatility, droplet diameter, and equivalence ratio (both overall and gaseous phase) on turbu-lent flame propagation in droplet-laden mixtures will be analysed in detail by carrying out extensive parametric studies to obtain fundamental physical understanding of the influences of these parameters on the flame propagation statistics, burning rate and pollutant formation (e.g. NOx generation rate). Although addressed to a limited extent by experimental studies in the past, an extensive DNS based investigation of this problem, supported by, and directly compared with, experimentation is yet to be reported in the existing literature. In this project, the fundamental physical understanding from both DNS and experimental data will be used to develop models in the context of the flamelets and Conditional Moment Closure (CMC) based reaction rate closures. Fundamental understanding of flame propagation into droplet-laden mixtures and its modelling will provide a robust cost-effective Computational Fluid Dynamics (CFD) based design tool for reliable, energy-efficient and cleaner combustion devices involving droplet-laden mixtures (e.g. Direct Injection (DI) engines, Compression Ignition (CI) engines, Aero gas turbines etc.).

Subjects by relevance
  1. Physics
  2. Simulation
  3. Computational fluid dynamics
  4. Turbulence
  5. Combustion (active)

Extracted key phrases
  1. Fundamental physical understanding
  2. Fundamental understanding
  3. Turbulent flame propagation
  4. Flame propagation statistic
  5. Laden reactant mixture
  6. Laden mixture
  7. Droplet diameter
  8. E.g. NOx generation rate
  9. Experimental study
  10. Extensive parametric study
  11. Reaction rate closure
  12. Experimental datum
  13. E.g. Direct Injection
  14. Extensive DNS
  15. Numerical investigation

Related Pages

UKRI project entry

UK Project Locations