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 conferencePaper

6 Scopus citations

Abstract

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 - Dec 1 2001
Event39th Aerospace Sciences Meeting and Exhibit 2001 - Reno, NV, United States
Duration: Jan 8 2001Jan 11 2001

Other

Other39th Aerospace Sciences Meeting and Exhibit 2001
CountryUnited States
CityReno, NV
Period1/8/011/11/01

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Laminar burning rates and markstein lengths of CH<sub>4</sub>/O<sub>2</sub>/inert mixtures at high pressures'. Together they form a unique fingerprint.

  • Cite this

    Rozenchan, G., Tse, S. D., Zhu, D. L., & Law, C. K. (2001). Laminar burning rates and markstein lengths of CH4/O2/inert mixtures at high pressures. Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States.