DLR Portal
Home|Sitemap|Contact|Accessibility Imprint and terms of use Privacy |Deutsch
You are here: Home:Departments and Groups:Computer Simulation
Advanced Search
Key Research Topics
Departments and Groups
Chemical Kinetics and Analytics
Computer Simulation
Gas Turbines
Combustion Diagnostics
Multiphase Flow and Alternative Fuels
High-pressure Experiments
Research Facilities
Projects
Publications
Job Opportunities
Press Release
How to find us
Research Field
Print

Combustion involving slow chemistry, simulation of soot formation



In low-emission combustion systems, especially, conditions are frequently encountered in which the chemistry must not be infinitely fast. This can apply to heat release as well as to pollutant formation (e.g. NOx, soot). In such cases, modelling combustion is particularly difficult. In combustion models that integrate chemical reaction mechanisms, it is necessary to solve transport equations for all the relevant components. It is possible with ‘presumed’ or PDF transport equation methods to take turbulence-chemistry interaction into account when modelling combustion processes. Both these approaches are pursued at the Institute.
There are no known simulation models that are capable of simulating soot formation in combustion chambers to any satisfactory extent. When developing such models, especially for 3D simulation, a compromise must be found between complex chemical approaches and the amount of computing time required. The Computer Simulation department, in close cooperation with the Chemical Kinetics department, is developing techniques for detailed modelling of soot formation using CFD code and testing these techniques by comparing with measurements.

 

Computed soot distribution (left half) and temperature contour (right half) for two different configurations of the methane-air inlet, The left figure shows the simulation with a equivalence ratio of 3, whereas the right hand side depicts the outcome of the simulation for a pure methane inflow.

 


Research Fields
Numerical methods
Simulation of
soot formation
Combustion noise
Combustion
oscillations
Wall heat load
Supersonic
combustion
Software
THETA
Related Topics
Pollutant
Copyright © 2021 German Aerospace Center (DLR). All rights reserved.