An experimental study of premixed flame impingement heat transfer
- Purdue Univ., West Lafayette, IN (United States). School of Mechanical Engineering
This paper reports results of an experimental study to determine the flame structure and heat transfer characteristics of a premixed methane-air flame impinging on a calorimeter. The flame structure is studied photographically and through temperature measurements. The convection and radiation heat transfer contributions of the flame are separated using a black and a highly reflecting water cooled calorimeter. The effects of nozzle-to-plate spacing, firing rate and equivalence ratio on the flame structure and average heat flux are reported. The axial temperature profiles are found to be a strong function of the gap between burner and calorimeter. The radial temperature profiles show a sharp decline near the burner edge. The photographs reveal that multiple jets, arranged in a circular configuration, exit between the cup-shaped ceramic burner and the calorimeter plate. The length of the flame increases with both the firing rate and the equivalence ratio. The heat flux is highest when the burner is closest to the calorimeter, except for the high firing rates when quenching occurs. Even though the heat flux increases, the heat transfer efficiency decreases with increasing firing rate. Heat flux is also found to increase as the flame becomes air rich in the range of parameters investigated.
- OSTI ID:
- 442720
- Report Number(s):
- CONF-961105-; ISBN 0-7918-1523-4; TRN: IM9712%%145
- Resource Relation:
- Conference: 1996 international mechanical engineering congress and exhibition, Atlanta, GA (United States), 17-22 Nov 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the ASME Heat Transfer Division. Volume 4: Natural convection within a horizontal circular cylinder heated from below and cooled from above; Numerical methods for coupled fluid-thermal-structural interaction; Thermal analysis in waste processing and disposal; Heat transfer in fire and combustion systems; HTD-Volume 335; Pepper, D.W. [ed.] [Univ. of Nevada, Las Vegas, NV (United States)]; Douglass, R.W. [ed.] [Idaho National Engineering Lab., Idaho Falls, ID (United States)]; Heinrich, J.C. [ed.] [Univ. of Arizona, Tucson, AZ (United States)] [and others]; PB: 433 p.
- Country of Publication:
- United States
- Language:
- English
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