Thesis-2005-Abdelkarim.pdf (9.14 MB)
Download fileNumerical modelling of direct-injection gasoline fuel sprays
thesis
posted on 2018-07-20, 15:46 authored by Nazar B.H. AbdelkarimThis thesis presents a numerical study of the break-up and atomisation of gasoline
fuel sprays injected into atmospheric flow conditions and environments related to
combustion chamber conditions. Calculations of the fuel break-up process were
achieved by four different models: Taylor Analogy Break-up (TAB), the wave
instability theory (WAVE), the Hybrid Sheet-TAB and the Hybrid WAVE-FIPA
models. The TAB model relates the break-up process to the droplet oscillations;
whereas the WAVE models calculate the fuel break-up from the unstable waves on
the droplet surface. The modified version of the TAB model, called the Hybrid
Sheet-TAB model delays the start of the break-up further downstream from the
nozzle tip. A new hybrid model, the WAVE-FIPA model, divides the spray
atomisation processes into a primary stage, where the WAVE model is used, and a
secondary stage, which is simulated using experimental correlations to calculate the
break-up time for the low Weber number droplets. [Continues.]
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering