Numerical Calculation of Aspiration Efficiency of Aerosols into Thin Walled Sampling Inlets

Abstract

Efficiency of aspiration of particles from a flowing airstream into a thin walled sampling inlet is accurately predicted using a numerical model. The model combines the Boundary Integral Equation method for predicting the air velocity field into the inlet with an analytical solution to the particle equations of motion to describe particle trajectories. A two and a three dimensional model are examined. Results for the three dimensional model correlate well with an empirical model of aspiration efficiency. The method can be generalized for a wide range of airstream, sampling inlet, and particle conditions.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1991
Accession Number
ADA239231

Entities

People

  • Keven M. Boyle

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Biomedical

DTIC Thesaurus Topics

  • Air Flow
  • Air Force
  • Computers
  • Coordinate Systems
  • Ecology
  • Efficiency
  • Equations
  • Equations Of Motion
  • Flow Fields
  • Free Stream
  • Geometry
  • Integral Equations
  • Particle Trajectories
  • Sampling
  • Three Dimensional
  • Two Dimensional
  • Wind Velocity

Readers

  • Aerosol Science/Aerosol Physics
  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)