TY - GEN
T1 - Effect of geometry of pressure-swirl duplex nozzle and ALR on atomization characteristics of Jet A-1 fuel
AU - Hasan, M. M.
AU - Chandrahasan, R.
AU - Ru, S.
AU - Choi, Y.
AU - Lee, J.
N1 - Publisher Copyright:
Copyright © 2019 KSME.
PY - 2019
Y1 - 2019
N2 - The efficiency of engine combustion is strongly dependent on fuel atomization and spray processes which in turn are greatly influenced by nozzle internal geometry and parameter like air to liquid ratio (ALR). Modern engines employ different geometrically designed nozzles. It is crucial to characterize the effect of the internal geometry of the nozzle and ALR on atomization characteristics. In this study, the effects of geometric parameters of the pressure-swirl duplex nozzle and ALR on the spray characteristics of Jet A-1 fuel were investigated. Two different shaped pilot nozzles and two different shaped main nozzles were used. The analysis of spray characteristics was done by using particle image velocimetry (PIV) system and phase Doppler anemometry (PDA) system. Spray cone angle, Sauter mean diameter (SMD) distribution and weighted mean SMD (WMSMD) were analyzed. In the case of the effect of the internal geometry of the nozzle, the results show that when main and pilot nozzle work together, it produces a higher spray cone angle compared to the pilot nozzle alone. Cone-shaped pilot nozzle tip exhibits better atomization characteristic than flat shaped pilot nozzle tip. Combined main and pilot nozzle with counter-rotating flow provides smaller droplets and higher spray cone angle than co-rotating flow configuration. In the case of the effect of ALR, a decreasing trend in the spray cone angle is found with increasing ALR. Moreover, WMSMD increases with increasing ALR up to 1.16, but thereafter, it decreases again.
AB - The efficiency of engine combustion is strongly dependent on fuel atomization and spray processes which in turn are greatly influenced by nozzle internal geometry and parameter like air to liquid ratio (ALR). Modern engines employ different geometrically designed nozzles. It is crucial to characterize the effect of the internal geometry of the nozzle and ALR on atomization characteristics. In this study, the effects of geometric parameters of the pressure-swirl duplex nozzle and ALR on the spray characteristics of Jet A-1 fuel were investigated. Two different shaped pilot nozzles and two different shaped main nozzles were used. The analysis of spray characteristics was done by using particle image velocimetry (PIV) system and phase Doppler anemometry (PDA) system. Spray cone angle, Sauter mean diameter (SMD) distribution and weighted mean SMD (WMSMD) were analyzed. In the case of the effect of the internal geometry of the nozzle, the results show that when main and pilot nozzle work together, it produces a higher spray cone angle compared to the pilot nozzle alone. Cone-shaped pilot nozzle tip exhibits better atomization characteristic than flat shaped pilot nozzle tip. Combined main and pilot nozzle with counter-rotating flow provides smaller droplets and higher spray cone angle than co-rotating flow configuration. In the case of the effect of ALR, a decreasing trend in the spray cone angle is found with increasing ALR. Moreover, WMSMD increases with increasing ALR up to 1.16, but thereafter, it decreases again.
KW - ALR
KW - Nozzle geometry
KW - PDA
KW - PIV
KW - Pressure-swirl duplex nozzle
UR - https://www.scopus.com/pages/publications/85076499346
U2 - 10.1115/AJKFluids2019-5111
DO - 10.1115/AJKFluids2019-5111
M3 - Conference paper
AN - SCOPUS:85076499346
T3 - ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
BT - Fluid Measurement and Instrumentation; Micro and Nano Fluid Dynamics
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019
Y2 - 28 July 2019 through 1 August 2019
ER -