Flame Acceleration and Transition to Detonation in High Speed Turbulent Combustion

Abstract

The objective of this project is to address the grand-challenge question in combustion dynamics: How and under what circumstances does a flame propagating in a smooth channel accelerate to the point where there is a transition to detonation (DDT)? We are also asking: What are the specific physical mechanisms controlling this process? Work has progressed on five fronts: (1) Clarifying the route to DDT as the channel geometries change from large to small flow blockages; (2) Finding the mechanism of DDT in small, smooth channels; (3) Finding adequate and simplified models for chemical and diffusion processes for use in complex reactive-fluid-dynamics simulations of hydrocarbon combustion; (4) Determining the effects of surface roughness on DDT; and (5) Determining the effects of acoustic-flame-boundary interactions in closed channels containing fuel-air mixtures.

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Document Details

Document Type
Technical Report
Publication Date
Dec 21, 2016
Accession Number
AD1024642

Entities

People

  • Elaine Oran

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Chemical Reactions
  • Combustion
  • Combustion Products
  • Computations
  • Detonations
  • Diffusion
  • Explosions
  • Fires
  • Fluid Dynamics
  • Mechanics
  • Roughness
  • Shock Waves
  • Simulations
  • Surface Roughness
  • Temperature Gradients

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Systems Analysis and Design