Fundamental Studies on Droplet Interactions in Dense Sprays

Abstract

Computational studies of interactive, vaporizing droplets have been made in order to understand better dynamics of dense sprays. Axisymmetric situations with droplets moving in tandem and three-dimensional situations with droplets moving in parallel have been considered. Detailed velocity and thermochemical properties fields have been determined. Lift and drag coefficients, Nusselt numbers, and Sherwood numbers for the droplets have been obtained. Correlations of these numbers with instantaneous Reynolds number and transfer number have been obtained. The flow field has been solved by implicit finite-difference solutions of the Navier-Stokes equations. Explanations for the modifications of lift and drag forces, trajectories, and transport phenomena due to droplet interactions have been formulated. Results have been obtained for fuel droplets, especially in high temperature environments, and, to a limited extent, for liquid oxygen (LOX) droplets in a hot, reducing environment. The results, especially the correlations, should prove useful in spray modelling.

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Document Details

Document Type
Technical Report
Publication Date
Dec 02, 1991
Accession Number
ADA246918

Entities

People

  • C. H. Chiang
  • I. Kim
  • S. E. Elghobashi
  • W. A. Sirgnano

Organizations

  • University of California, Irvine

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Coefficients
  • Computations
  • Environment
  • Equations
  • Flow Fields
  • Gas Turbines
  • Geometry
  • Heat Of Vaporization
  • High Pressure
  • High Temperature
  • Liquid Oxygen
  • Liquid Phases
  • Navier Stokes Equations
  • Payload
  • Symmetry
  • Three Dimensional
  • Vaporization

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.