Accession Number:

ADA303507

Title:

Breakup and Turbulence Generation in Dense Sprays.

Descriptive Note:

Final technical rept. 15 Aug 93-14 Aug 95,

Corporate Author:

MICHIGAN UNIV ANN ARBOR

Report Date:

1995-09-30

Pagination or Media Count:

109.0

Abstract:

Single and double pulse holography was used to measure the outcomes of secondary drop breakup after shock wave disturbances in air at normal temperature and pressure the resulting drop breakup regimes and drop size and velocity distributions were successfully interpreted and correlated based on phenomenalogical analysis. Laser velocimetry was used to measure the properties of sphere wakes at moderate Reynolds numbers less than 1000 in turbulent environments relative turbulence intensities in the range 2.109.5 it was found that velocity distributions in these wakes could be correlated as laminar like turbulent wakes with effective turbulent visd6sities that were simple functions of sphere Reynolds numbers and relative turbulence intensities. A stochastic analysis of turbulence generation by particles drops was evaluated using earlier laser velocimetry measurements for dispersed multiphase flows it was found that velocity fluctuations could be estimated reasonably well based on stochastic synthesis of randomly arriving particle drop wakes using Campbells theorem.

Subject Categories:

  • Fluid Mechanics
  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE