Numerical studies of dilute and dense spray characteristics

Conference · Tue Dec 31 23:00:00 EST 1991

OSTI ID:5420572

Kim, Y M; Shang, H M; Chen, C P; Ziebarth, J P; Wang, T S ^[1]

---

1. Alabama, University, Huntsville (United States) NASA, Marshall Space Flight Center, Huntsville, Ay (United States)

Several issues involving the improvement of physical submodels and the computational efficiency in modeling dilute and dense spray combustion are discussed. First, the implementations of a dispersion width approach accounting for turbulent dispersion within each computational parcel is discussed. This is essentially a statistical transport model and the testings of this model confirm the capability of accurately representing dispersion in nearly-homogeneous and inhomogeneous turbulent flows with improved efficiency over the delta function stochastic separated flow model. To account for the dense spray effects, an existing drop collision and coalescence model and a Taylor analogy breakup (TAB) model were employed. These models were incorporated into a state-of-the-art multiphase all-speed transient flow solution procedure. Several examples including nonevaporating, evaporating, and burning dense spray cases were studied. The numerical results show reasonably good comparisons with available experimental data in terms of spray penetration, drop sizes, and overall configuration of a spray flame. 35 refs.

• Research Organization: National Aeronautics and Space Administration, Huntsville, AL (United States). George C. Marshall Space Flight Center
• OSTI ID: 5420572
• Report Number(s): AIAA-Paper--92-0225; CONF-920157--
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
DROPLETS
FLUID FLOW
FLUID MECHANICS
FUELS
KINETICS
LIQUID FUELS
MATHEMATICAL MODELS
MATHEMATICS
MECHANICS
OXIDATION
PARTICLES
REACTION KINETICS
SPRAYS
STATISTICS
THERMOCHEMICAL PROCESSES
TURBULENT FLOW