In a comprehensive experimental study, a Flow-Blurring(FB) injector is examined, with glycerol selected as the fuel due to its notably challenging thermophysical attributes, characterized by elevated viscosity and a diminished calorific value, impacting both atomization and subsequent combustion. Preheating is employed to address these adverse thermophysical properties, raising the combustion air temperature to 500K and the fuel temperature to 400K. In FB injector, there is a notable elevation in the axial velocity of particles. As the geometric swirl number increases, it induces a robust reversed axial flow field development, attributed to the breakdown of vortices. The convergent nozzle improves the entrainment of combustion air into the spray. The distance between the convergent nozzle and the FB injector significantly influences combustion stability. This paper investigates distances of 3mm, 6mm, 9mm, 12mm, and 15mm. A digital camera was employed, and flame liftoff stability and the flame anchoring point were investigated through visual combustion imaging. OH* Chemiluminescence imaging technique is used to diagnose the flame morphology. Attaining flame anchoring closer to the nozzle's immediate downstream region is accomplished by increasing ALR and geometric swirl number.