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CLD Flame

Coflow Laminar Diffusion Flame (CLD Flame)

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Image of a lifted flame of 50% propylene in a coflow of air (at ambient pressure) from an ex-ploratory test conducted on the International Space Station in 2009 as part of the Smoke Point In Coflow Experiment (SPICE).

Research, especially including that already conducted in microgravity, has revealed that our current predictive ability is significantly lacking for flames at the extremes of fuel dilution, namely for sooty pure-fuel flames and dilute flames that are near extinction. The general goal of the Coflow Laminar Diffusion Flame (CLD Flame) experiment is to extend the range of flame conditions that can be accurately predicted by developing and experimentally verifying chemical kinetic and soot formation submodels. The dependence of normal coflow flames on injection velocity and fuel dilution will be carefully examined for flames at both very dilute and highly sooting conditions. Measurements will be made of the structure of diluted methane and ethylene flames in an air coflow. Lifted flames will be used as the basis for the research to avoid flame dependence on heat loss to the burner. The results of this experiment will be directly applicable to practical combustion issues such as turbulent combustion, ignition, flame stability, and more.


Coflow Laminar Diffusion Flame (CLD Flame)
Principal Investigator: Prof. Marshall Long, Yale University
Co-Investigator: Prof. Mitchell Smooke, Yale University
Co-Investigator (and Russian lead): Prof. Sergey Minaev, Far Eastern Federal University, Russia
Co-Investigator: Dr. Valerii Babushok, Far Eastern Federal University, Russia
Co-Investigator: Dr. Fedir Sirotkin, Far Eastern Federal University, Russia

Project Scientist: Dennis Stocker, NASA Glenn Research Center

Deputy Project Scientist: Prof. Fumiaki Takahashi, Case Western Reserve University