A Regime Diagram for Autoignition of Homogeneous Reactant Mixtures with Turbulent Velocity and Temperature Fluctuations
Type
ArticleKAUST Department
Clean Combustion Research CenterComputational Reacting Flow Laboratory (CRFL)
Mechanical Engineering Program
Physical Science and Engineering (PSE) Division
Date
2015-04-02Online Publication Date
2015-04-02Print Publication Date
2015-08-03Permanent link to this record
http://hdl.handle.net/10754/350277
Metadata
Show full item recordAbstract
A theoretical scaling analysis is conducted to propose a diagram to predict weak and strong ignition regimes for a compositionally homogeneous reactant mixture with turbulent velocity and temperature fluctuations. The diagram provides guidance on expected ignition behavior based on the thermo-chemical properties of the mixture and the flow/scalar field conditions. The analysis is an extension of the original Zeldovich’s analysis by combining the turbulent flow and scalar characteristics in terms of the characteristic Damköhler and Reynolds numbers of the system, thereby providing unified and comprehensive understanding of the physical and chemical mechanisms controlling ignition characteristics. Estimated parameters for existing experimental measurements in a rapid compression facility show that the regime diagram predicts the observed ignition characteristics with good fidelity.Citation
A Regime Diagram for Autoignition of Homogeneous Reactant Mixtures with Turbulent Velocity and Temperature Fluctuations 2015:150402072307000 Combustion Science and TechnologyPublisher
Informa UK LimitedAdditional Links
http://www.tandfonline.com/doi/full/10.1080/00102202.2015.1034355ae974a485f413a2113503eed53cd6c53
10.1080/00102202.2015.1034355