Unsteady heat transfer during laminar flame quenching
Conference
·
OSTI ID:7060524
Measurements were made of the unsteady heat transfer to a wall during the quenching of premixed, methane-air flames. One dimensional laminar flames were produced in a constant volume chamber and the heat transfer into the quenching surface was measured by means of a platinum thin film resistance thermometer. The experiments were performed at pressures near atmospheric over a range of equivalence ratios from 0.7 to 1.2. Predictions of the heat transfer were made with two numerical finite difference models, one with detailed kinetics and the other with single step kinetics. The main experimental results are: (1) the data are successfully correlated using the heat release rate of the flame prior to quenching; and (2) the maximum heat flux is related to the quenching distance and thus it may be possible to use measurements of the quenching distance to predict the maximum heat flux. A comparison of the experimental results and the numerical calculations revealed that: (1) a single step reaction model predicts the heat transfer as well as a detailed kinetics model, to within 15% of the experimental results; and (2) thermal diffusion and the chemical reaction rate of combustion are the dominant processes which determine the heat flux during quenching.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA); Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48; AC03-76SF00098
- OSTI ID:
- 7060524
- Report Number(s):
- UCRL-90319; CONF-840801-3; ON: DE84006301
- Country of Publication:
- United States
- Language:
- English
Similar Records
Unsteady heat transfer during the interaction of a laminar flame with a cold wall
The effects of pressure and temperature on heat transfer during flame quenching
Geometric and radiation effects on steady and unsteady strained laminar flames
Technical Report
·
Mon Oct 31 23:00:00 EST 1983
·
OSTI ID:5492290
The effects of pressure and temperature on heat transfer during flame quenching
Conference
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:5212091
Geometric and radiation effects on steady and unsteady strained laminar flames
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:93290