TY - GEN
T1 - The influence of density ratio on the primary atomization of a turbulent liquid jet in crossflow
AU - Herrmann, Marcus
N1 - Funding Information:
This work was supported in part by CASCADE Technologies Inc. under NavAir SBIR N07-046 . The author would like to thank M. Arienti and M. Soteriou from United Technologies Research Center for many helpful discussions and participation in the NavAir SBIR as well as S. Hajiloo and F. Ham from Cascade Technologies Inc.
PY - 2010
Y1 - 2010
N2 - In this paper we study the impact of density ratio on the liquid jet in crossflow penetration, deformation, and atomization if all other characteristic parameters, i.e. momentum flux ratio, jet and crossflow Weber and Reynolds numbers, are maintained constant. We perform detailed simulations of the primary atomization region using the refined level set grid method to track the motion of the liquid/gas phase interface. We employ a balanced force, interface projected curvature method to ensure high accuracy of the surface tension forces, use a multi-scale approach to transfer broken off, small scale nearly spherical drops into a Lagrangian point particle description allowing for full two-way coupling and continued secondary atomization, and employ a dynamic Smagorinsky large eddy simulation approach in the single phase regions of the flow to describe turbulence. We compare simulation results obtained previously using a liquid to gas density ratio of 10 for a momentum flux ratio 6.6, Weber number 330, and Reynolds number 14000 liquid jet injected into a Reynolds number 740,000 gaseous crossflow to those at a density ratio of 100, a value typical for gas turbine combustors. The results show that the increase in density ratio results in a noticeable increase in jet penetration and decrease in liquid core deformation in the transverse direction.
AB - In this paper we study the impact of density ratio on the liquid jet in crossflow penetration, deformation, and atomization if all other characteristic parameters, i.e. momentum flux ratio, jet and crossflow Weber and Reynolds numbers, are maintained constant. We perform detailed simulations of the primary atomization region using the refined level set grid method to track the motion of the liquid/gas phase interface. We employ a balanced force, interface projected curvature method to ensure high accuracy of the surface tension forces, use a multi-scale approach to transfer broken off, small scale nearly spherical drops into a Lagrangian point particle description allowing for full two-way coupling and continued secondary atomization, and employ a dynamic Smagorinsky large eddy simulation approach in the single phase regions of the flow to describe turbulence. We compare simulation results obtained previously using a liquid to gas density ratio of 10 for a momentum flux ratio 6.6, Weber number 330, and Reynolds number 14000 liquid jet injected into a Reynolds number 740,000 gaseous crossflow to those at a density ratio of 100, a value typical for gas turbine combustors. The results show that the increase in density ratio results in a noticeable increase in jet penetration and decrease in liquid core deformation in the transverse direction.
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M3 - Conference contribution
AN - SCOPUS:84943419350
T3 - Western States Section of the Combustion Institute Spring Technical Meeting 2010
SP - 191
EP - 205
BT - Western States Section of the Combustion Institute Spring Technical Meeting 2010
PB - Western States Section/Combustion Institute
T2 - Western States Section of the Combustion Institute Spring Technical Meeting 2010
Y2 - 22 March 2010 through 23 March 2010
ER -