Safety Relevant Ignition Processes



Even though numerous scientific questions concerning ignition processes have been solved in recent years, especially for SI or Diesel engines, many problems in safety engineering could not be explained sufficiently. Therefore, the overall objective of our research group is to develop a comprehensive numerical model taking into account all underlying physical and chemical processes (chemical reactions, molecular transport, convection, and, in the case of induced ignition, the details of the coupling of the energy into the system). A comprehensive model will be developed, which offers the possibility to simulate ignition processes for the most important gases concerning safety engineering with respect to local ignition scenarios (in particular scenarios, where the geometry can be simplified to generic one- or two-dimensional configurations). The necessary experimental data to validate this model will be obtained in the different projects during this period. However, in order to allow a continuous extension of the models to configurations closer to real systems, within two projects the influence of turbulence on ignition processes will be examined.


Project structure

The following project structure is deduced from the research problems to be solved:

Project 1Physical and chemical models for ignition processes
Project 3Autoignition mechanisms and kinetics of diethyl-ether-containing mixtures
Project 4Ignition by mechanical sparks
Project 5Ignition by electrical discharges
Project 6
Probability of successful ignition events in turbulent flows using direct numerical simulations
Project 7Ignition by a hot free jet