Accession Number:

ADP012362

Title:

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

Descriptive Note:

Corporate Author:

UNIVERSITE DE ROUEN MONT SAINT AIGNAN (FRANCE)

Personal Author(s):

Report Date:

2001-03-01

Pagination or Media Count:

12.0

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 Kolmogorovs 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 pdFs is shown at different sections in downstream direction.

Subject Categories:

  • Numerical Mathematics
  • Statistics and Probability
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE