0
Research Papers: Combustion and Reactive Flows

A Numerical Study of Concurrent Flame Propagation Over Methanol Pool Surface

[+] Author and Article Information
Seik Mansoor Ali

Safety Research Institute, Atomic Energy Regulatory Board, Kalpakkam-603 102, India

Vasudevan Raghavan1

Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai-600 036, Indiaraghavan@iitm.ac.in

K. Velusamy

 Indira Gandhi Center for Atomic Research, Kalpakkam-603 102, India

Shaligram Tiwari

Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai-600 036, India

1

Corresponding author.

J. Heat Transfer 134(4), 041202 (Feb 15, 2012) (9 pages) doi:10.1115/1.4005111 History: Received April 20, 2011; Revised September 12, 2011; Published February 15, 2012; Online February 15, 2012

Concurrent flame spread over methanol pool surface under atmospheric conditions and normal gravity has been numerically investigated using a transient, two-phase, reacting flow model. The average flame spread velocities for different concurrent air velocities predicted using the model are quite close to the experimental data available in the literature. As the air velocity is increased, the fuel consumption rate increases and aids in faster flame spread process. The flame initially anchors around the leading edge of the pool and the flame tip spreads over the pool surface. The rate of propagation of flame tip along the surface is seen to be steady without fluctuations. The flame spread velocity is found to be nonuniform as the flame spreads along the pool surface. The flame spread velocity is seen to be higher initially. It then decreases up to a point when the flame has propagated to around 40% to 50% of the pool length. At this position, a secondary flame anchoring point is observed, which propagates toward the trailing edge of the pool. As a result, there is an increasing trend observed in the flame spread velocity. As the air velocity is increased, the initial flame anchoring point moves downstream of the leading edge of the fuel pool. The variations of interface quantities depend on the initial flame anchoring location and the attainment of thermodynamic equilibrium between the liquid- and gas-phases.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Computational domain

Grahic Jump Location
Figure 2

Temporal variations of (a) the flame tip location and (b) the fuel consumption rate in kg/m2 s

Grahic Jump Location
Figure 3

Variation of flame spread velocity along the pool surface

Grahic Jump Location
Figure 4

Average flame spread velocity versus air velocity

Grahic Jump Location
Figure 5

Temperature contours and velocity vectors as a function of time in the gas-phase for u∞  = 3.9 m/s

Grahic Jump Location
Figure 6

Temperature contours and velocity vectors as a function of time in the liquid-phase for u∞  = 3.9 m/s

Grahic Jump Location
Figure 7

Variation of interface quantities (a, b) temperature, (c, d) gas-phase u-velocity (x-component) and (e, f) gas-phase v-velocity (y-component) along the pool length for various free stream velocity cases; (a), (c) and (e) for u∞  = 1.3 m/s; (b), (d), and (f) for u∞  = 3.9 m/s

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In