In this paper, effects of the difference between the air injection velocity and the fuel injection velocity on the rapidly mixed tubular flame have been investigated. A parameter of αst which is the ratio of the air injection velocity to the fuel injection velocity at stoichiometric condition has been introduced, and five tubular flame burners with different αst, 0.6, 1.2, 2.4, 6.0 and 11.9 were examined. Stability limits of the propane-air flame and the local fuel concentrations of unburned mixture have been determined. Results show that, with αst = 0.6 and αst = 1.2, in burner a stable tubular flame can be established in the range of Φ = 0.45 to 2.1 and Φ = 0.48 to 2.15. When αst is increased to 2.4, in which the air injection velocity is almost two times higher than that of the fuel at stoichiometric condition, the stable combustion range shifts to the relatively fuel rich side of Φ = 0.55 to 2.35. With further increase in the αst to 6.0 and 11.9, stable combustion range shifts to richer side of Φ = 0.6 to 2.45, and Φ = 0.7 to 2.9, respectively. Results of gas analysis have revealed that, for αst = 0.6 and αst = 1.2, although the total equivalence ratio of supplied air and fuel were stoichiometric, a fuel rich mixture gas of Φ = 1.13 and Φ = 1.17 was formed locally at the center of the burner. Increasing in the αst leads to a decrease in the local equivalence ratio, such as Φ = 0.95, 0.42, and 0.19 for αst = 2.4, 6.0 and 11.9, respectively. These results indicate that the mixing process of air and fuel in the rapidly mixed tubular flame is greatly affected by the injection velocity ratio, suggesting the possibility of the flame front structure control by the injection velocity ratio.
Skip Nav Destination
ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Effects of the Air-Fuel Ejection Velocity Ratio on the Combustion Characteristics and the Unburned Gas Compositions of the Propane–Air Rapidly Mixed Tubular Flame Combustion
Y. Wang,
Y. Wang
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Search for other works by this author on:
K. Kimura,
K. Kimura
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Search for other works by this author on:
N. Gokita,
N. Gokita
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Search for other works by this author on:
D. Shimokuri,
D. Shimokuri
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Search for other works by this author on:
S. Ishizuka
S. Ishizuka
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Search for other works by this author on:
Y. Wang
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
K. Kimura
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
N. Gokita
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
D. Shimokuri
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
S. Ishizuka
Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
Paper No:
AJK2011-21019, pp. 3813-3818; 6 pages
Published Online:
May 25, 2012
Citation
Wang, Y, Kimura, K, Gokita, N, Shimokuri, D, & Ishizuka, S. "Effects of the Air-Fuel Ejection Velocity Ratio on the Combustion Characteristics and the Unburned Gas Compositions of the Propane–Air Rapidly Mixed Tubular Flame Combustion." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 3813-3818. ASME. https://doi.org/10.1115/AJK2011-21019
Download citation file:
8
Views
Related Proceedings Papers
Related Articles
Effect of Fuel System Impedance Mismatch on Combustion Dynamics
J. Eng. Gas Turbines Power (January,2008)
Stability of Flames Close to Auto-Ignition Temperatures Generated by Extreme Separated Gas-Air Inlets
J. Energy Resour. Technol (March,2001)
Partially Premixed Flame Structure and Stability of Twin Droplets in Flows
J. Heat Transfer (November,2000)
Related Chapters
The Identification of the Flame Combustion Stability by Combining Principal Component Analysis and BP Neural Network Techniques
International Conference on Mechanical Engineering and Technology (ICMET-London 2011)
Effect of Fuel Properties on Ignition and Combustion Limits in Gas Turbine Combustors
Stationary Gas Turbine Alternative Fuels
Numerical Modeling of N O x Emission in Turbulant Spray Flames Using Thermal and Fuel Models
International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-China 2011), Volumes 1–3