Laminar burning rates and markstein lengths of CH4/O2/inert mixtures at high pressures

G. Rozenchan, S. D. Tse, D. L. Zhu, C. K. Law

Research output: Contribution to conferencePaperpeer-review

8 Scopus citations


Outwardly-propagating spherical flames at constant pressure for methane/oxygen/inert mixtures were experimentally studied for pressures up to 40 atmospheres. The flames were imaged with Schlieren cinematography in a constant, high-pressure combustion apparatus. Results substantiate previous observations of the propensity of cell formation over the flame surface due to hydrodynamic instability, and provide convincing evidence that wrinkled flame is the preferred mode of propagation in methane/air mixtures in environments above only a few atmospheres. It is further shown that, by using helium as a diluent, and by reducing the oxygen concentration of the combustible, thermal-diffusional instability can be mostly suppressed and the hydrodynamic instability delayed. Stretch-free laminar flame speeds and Markstein lengths as functions of equivalence ratio were subsequently determined for such smooth flames up to 40 atm, and were compared with the calculated values allowing for detailed chemistry and transport.

Original languageEnglish (US)
StatePublished - 2001
Externally publishedYes
Event39th Aerospace Sciences Meeting and Exhibit 2001 - Reno, NV, United States
Duration: Jan 8 2001Jan 11 2001


Other39th Aerospace Sciences Meeting and Exhibit 2001
Country/TerritoryUnited States
CityReno, NV

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering


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