A comparative study of the structure of burning sprays of number 2 and SRC-II fuel oils

Gollahalli, S. R.; Lin, Jiin-Hong

doi:10.1016/0010-2180(82)90068-2

Cited by 3 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 7(b) shows the effect of swirl on CO emissions for different values of Ds 1 with and without porous medium. For all cases shown in the figure, the CO emissions decrease with the increase in swirl number due to the enhanced mixing with air [35,55]. The reduction is less steep at higher swirl numbers.…”

Section: Emission Characteristics With Variation In Burner Geometrical Parametersmentioning

confidence: 90%

“…This range matches those found by Shihadeh et al [54] for a multi-annular swirl burner accommodating liquid fuel combustion, where NO x emissions decreased from 300 to 91 ppm and its emissions were attributed to the thermal and prompt mechanisms. At high-swirl degrees, turbulent spray combustion interrupts the prompt mechanism by providing sufficient air for complete fuel oxidation [55]. The increase in thermal NO x formation due to the increased flame gas temperatures by swirl mixing counteracts the inhibition of the prompt NO x , but the net effect is still a pronounced reduction in total NO x emissions [29,35].…”

Section: Emission Characteristics For Different Injection Anglesmentioning

confidence: 99%

“…The concentration of hydrocarbons decreases when the flame gas temperature and oxygen availability are high enough to oxidize the un-burnt hydrocarbons. The reduction in UHC concentration by swirl then indicates higher rates of soot oxidation [29,55].…”

Section: Emission Characteristics For Different Injection Anglesmentioning

confidence: 99%

“…In such conditions, a homogenous gas-phase oxidation takes place [55,65] with a wider jet spread. These conditions of mixing lead to a reduced peak flame gas temperatures as any excess air is entrained uniformly across the flame region.…”

Section: Gas Temperatures and Radiation Characteristicsmentioning

confidence: 99%

See 3 more Smart Citations

Investigation of liquid fuel combustion in a cross-flow burner

Kamal

Amohamad

2007

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

A rotary swirl burner was employed for liquid fuel spray combustion in a cross-flow stream of air. The effect of fuel spray orientation on mixing dynamics with the swirled air was investigated for different nozzle angles, including -45°, 0°, and 45°, respectively, with a variable portion of the air (from 0 to 100 per cent) allowed to flow aligned with the spray without swirl. The effect of swirl on CO and NOx emissions was found to be dominated by the competitive influences of improved mixing and increased kinetic rates. For cross injector alignment with air, NOx emissions were reduced by increasing the co-current air flowdue to the improved premixing effect, while for inclined alignment its emissions exhibited a reduction by supplying enough air to the spray lee side. High swirl intensity (swirl number up to 12) and co-current/cross-flow combination produce a reduction in the unburned hydrocarbons. The enhancement in flame radiation output with swirl was pronounced by an increase to 1.9 times the output without swirl. Inserting a porous medium at the burner exit, increased the enhancement to 4.18 times and promoted droplet evaporation. Enlarging the re-circulation zone beneath the fuel injector to a certain extent improved mixing and combustion efficiency.

show abstract

Section: Emission Characteristics With Variation In Burner Geometrical Parametersmentioning

confidence: 90%