A semi-empirical Laminar Smoke-Point (LSP) model is used to compare soot predictions against experimental Laser-Induced Incandescence (LII) based measurements in a lab-scale CFM-56 aircraft combustor with liquid jetA1 as fuel and dilution jets. The soot model, which has so far been used in the fire dynamics domain for laminar flames, has now been extended using LES simulations. Comparison of the averaged Discrete Particle Model (DPM) based spray with backlight spray images shows a good comparison. The simulation displays some degree of spray asymmetry similar to the data due to wall confinement effect. A comparison of the thermal field with the instantaneous flame image shows a good comparison in terms of the radial and axial extent of the flame front. Finally, comparison of the soot volume fraction predicted by the model with the LII data shows an excellent quantitative match. The soot field immediately downstream of the swirler shows a near uniform soot field at an angle of about 98 degree which is close to the measured angle. The radial extent of the soot at the widest section matches closely with the data. However, the model predicts an axial extension of the soot further downstream and up to the dilution jets which is not observed in LII. This could be due to the presence of PAH in these regions which are not picked in LII due to the spectral filter or could be due to the laser sheet attenuation by the liquid fuel. Thus, the LSP model gives good qualitative and quantitative prediction of soot in a realistic combustor.