Two-Dimensional Direct Numerical Simulations of Jet Spray under High Pressure

Two-dimensional direct numerical simulations are applied to a planar jet spray flow in order to investigate the effects of pressure on droplet behavior. For the gaseous phase, Eulerian mass, momentum, energy, and species conservation equations are solved. For the disperse phase, the fuel droplets ar...

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Bibliographic Details
Main Author: Nakamura, Mariko
Format: Conference Proceeding
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTERIZED SIMULATION
DIRAC EQUATION
DROPLETS
EVAPORATION
FLUID MECHANICS
JETS
LAGRANGIAN FUNCTION
NUMERICAL ANALYSIS
PRESSURE DEPENDENCE
RUNGE-KUTTA METHOD
SPRAYS
TWO-DIMENSIONAL CALCULATIONS
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Summary:Two-dimensional direct numerical simulations are applied to a planar jet spray flow in order to investigate the effects of pressure on droplet behavior. For the gaseous phase, Eulerian mass, momentum, energy, and species conservation equations are solved. For the disperse phase, the fuel droplets are tracked individually in a Lagrangian manner. Concerning the vaporization of droplets, a nonequilibrium Langmuir-Knudsen evaporation model is adopted. The results show that the droplet mean diameter increases as the distance from the nozzle increases; however, because evaporation does not progress rapidly at normal temperature, the change in the droplet mean diameter with the increase in the distance from the nozzle is small for each pressure condition. The droplet mean velocity decreases as the droplets move downstream for each pressure condition, and the gradient of the droplet mean velocity toward the axial direction differs with each pressure condition.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2991049