Ignition behavior of a multicomponent fuel spray

Journal Article · Fri Mar 31 23:00:00 EST 1989 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(89)90072-2· OSTI ID:6162732

Aggarwal, S K

Ignition characteristics of multicomponent fuel sprays are studied. Three subsets of equations, the gas-phase, the liquid-phase, and the droplet equations, are solved by a hybrid Eulerian-Lagrangian, explicit-implicit method. Major features of the ignition model are that a zero heat-flux criterion is used to define ignition, a global one-step reaction scheme with nonunity exponents of fuel and oxygen is employed for a multifuel system, and the transient thermal and composition fields inside the droplet are resolved via a diffusion-limit model. Monodisperse and polydisperse size distributions are considered. The results are presented for a bicomponent fuel spray. The ignition behavior exhibits a strong sensitivity to the initial fuel composition. The presence of a volatile component, even in small amounts, can greatly improve the ignitability of nonvolatile fuel sprays. The relative enhancement in ignitability depends strongly on the droplet size, volatility differential, hot wall temperature, and, to a lesser degree, on the equivalence ratio. The results are significant from a practical point of view as the concept may be used to improve the ignitability of liquid fuel sprays.

• Research Organization: Dept. of Mechanical Engineering, Univ. of Illinois at Chicago, Chicago, IL (US)
• OSTI ID: 6162732
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 76:1; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

090100 -- Hydrocarbon Fuels-- (-1989)
090500 -- Liquid Waste Fuels-- (-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
DIFFUSION
DROPLETS
EQUATIONS
FUELS
HEAT FLUX
IGNITION
KINETICS
LIQUID FUELS
PARTICLES
PHASE STUDIES
REACTION KINETICS
SPRAYS