Computations of turbulent evaporating sprays

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5522331

Aggarwal, S K; Chitre, S

A computational study of turbulent evaporating sprays is reported. The major focus is to examine the sensitivity of the vaporization behavior of turbulent sprays to the transient liquid-phase processes. Three models considered to represent these processes are the thin skin, infinite diffusion, and diffusion limit models. Favre-averaged equations with k-epsilon-g turbulence model are employed for the gas phase. The Lagrangian approach with a stochastic separated flow method is used for the liquid phase where the effects of gas turbulence on droplet trajectories and interphase transport rates are considered using random-walk computations. Also the variable-property effects are considered in detail. Results indicate that, depending upon the boiling temperature and heat of vaporization of the fuel considered, the vaporization behavior of turbulent sprays may be quite sensitive to the modeling of transient liquid-phase processes. Thus, it is important that for most hydrocarbon fuels these processes be adequately represented in any comprehensive spray computations. The present results also provide further support to the conclusions of earlier studies which have been based on simplified spray configurations. 8 refs.

• OSTI ID: 5522331
• Report Number(s): AIAA-Paper--89-2433; CONF-8907118--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
COMPUTERS
CRAY COMPUTERS
DIFFUSION
ENTHALPY
EVAPORATION
FLUID FLOW
FLUIDS
FUELS
GASES
LIQUID FUELS
LIQUIDS
MATHEMATICAL MODELS
PARTICLE SIZE
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SIZE
SPRAYS
THERMODYNAMIC PROPERTIES
TRANSITION HEAT
TURBULENT FLOW
VAPORIZATION HEAT