Analysis of transport mechanisms in dense fuel droplet sprays: Progress report for the period June 1, 1987-May 31, 1988

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:6928660

Kleinstreuer, C

A basic understanding of the effects of closely-spaced, evaporating droplets on the transfer processes in dense sprays are of importance for the improved design of fuel droplet combustion and other spray systems. The development of two different modeling approaches and preliminary results are presented for transient laminar axisymmetric two-phase flow past single and multiple droplets. The first approach is a finite element solution of the complete transport equations for convection heat transfer between a hot gas stream and closely-spaced volatile fuel droplets. The resulting computer simulation model is validated with empirical data sets for flow around a single, heated sphere in the Reynolds number range of 10 less than or equal to Re/sub d/ less than or equal to 200. Results of different case studies are given for single fuel droplet vaporization and for flow past a linear array of multiple spherical droplets. The second approach, ultimately based on the insight gained from the exact numerical solution, is a boundary-layer type simulation. For illustration purposes, results are given for the dynamics of interacting water drops in a trace gas environment. Semi-empirical correlations have been used for the drag/interaction force coefficient and for the near-wake velocities. 21 refs., 7 figs.

• Research Organization: North Carolina State Univ., Raleigh (USA). Dept. of Mechanical and Aerospace Engineering
• DOE Contract Number: FG05-87ER13728
• OSTI ID: 6928660
• Report Number(s): DOE/ER/13728-1; ON: DE88017256
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ANALYTICAL SOLUTION
CHEMICAL REACTIONS
COMBUSTION
COMPUTERIZED SIMULATION
CORRELATIONS
DOCUMENT TYPES
DROPLETS
ENERGY CONSUMPTION
ENERGY TRANSFER
EQUATIONS
EVAPORATION
FINITE ELEMENT METHOD
FLUID FLOW
FUELS
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
NUMERICAL SOLUTION
OXIDATION
PARTICLES
PHASE TRANSFORMATIONS
PROGRESS REPORT
SIMULATION
SPRAYS
THERMOCHEMICAL PROCESSES