Diffusion-flame extinction of liquid fuel at elevated pressures

Journal Article · Mon Jul 01 00:00:00 EDT 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90064-I· OSTI ID:5541558

Niioka, T; Hasegawa, S; Tsukamoto, T ^[1]; Sato, J ^[2]

---

1. Inst. of Fluid Science, Tohoku Univ., Katahira, Sendai 980 (JP)
2. Research Inst., Ishikawajima-Harima Heavy Industries Co. Ltd., Toyosu, Koto-Ku, Tokyo 135 (JP)

The objective of this paper is to determine the effect of pressure on droplet size at extinction of the diffusion flame around the droplet. Analogy between the diffusion flame in a stagnation-point flow on a liquid fuel and that of a droplet is given, and an analytical equation is obtained for the relationship between both diffusion flame extinctions. This equation makes it possible to calculate droplet diameter (d{sub c}) at extinction without any chemical parameters. In order to obtain extinction velocities, experiments are conducted for the diffusion flame in a stagnation-point flow at elevated pressures. The extinction velocity increases with pressure, but it becomes almost constant at pressures from about 0.3 to 1 MPa. From these data, it is found that the droplet diameter at extinction decreases sharply with pressure: d{sub c} = 150 {mu}m at 0.1 MPa, 46 {mu}m at 0.3 MPa, and 17 {mu}m at 0.8 MPa for heptane in an air environment.

• OSTI ID: 5541558
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 86:1; ISSN 0010-2180; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
025000 -- Petroleum-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR FLOW
ALKANES
ANALYTICAL SOLUTION
CALCULATION METHODS
DIFFUSION
DROPLETS
FIRE EXTINGUISHERS
FLAME PROPAGATION
FLAMES
FLUID FLOW
FUELS
GAS FLOW
HEPTANE
HIGH PRESSURE
HYDROCARBONS
LIQUID FUELS
ORGANIC COMPOUNDS
PARTICLES
PRESSURE EFFECTS
SIZE
VELOCITY