Statistical Modeling of the Air-Blast Atomization in the Langrangian Computation of Liquid Spray

Abstract

A new sub-grid-scale stochastic model of drops air-blast breakup is presented in this paper. The stochastic process is considered in the framework of cascade of uncorrelated breakage events in series down to the critical size, independently from the initial distribution of sizes. To this end, the Kolmogorov's discrete model of particle breakup has been reproduced in the form of evolution equation for distribution function. The asymptotic solution of this equation has been applied to simulate the drop breakup alongside with Lagrangian model of spray dynamics. Performed computations of air-blast atomization are related to a spray close to the rocket engine configuration. A broad spectra of droplet size is simulated at each spray location with a co-existence of large drops and small droplets. The evolution of shape of the droplet-size pdF's is shown at different sections in downstream direction.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2001
Accession Number
ADP012362

Entities

People

  • M. Gorokhovski

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Atomization
  • Combustion
  • Computations
  • Computer Programs
  • Distribution Functions
  • Flow
  • Heat Transfer
  • Liquid Jets
  • Normal Distribution
  • Particle Size
  • Particles
  • Personal Information Managers
  • Probability
  • Rocket Engines
  • Spatial Distribution
  • Stochastic Processes
  • Surface Tension

Readers

  • Aerospace Propulsion Engineering.
  • Quantum Chemistry
  • Statistical inference.