A Monte Carlo Radiation Model for Simulating Rarefied Multiphase Plume Flows

Abstract

A Monte Carlo ray trace radiation model is presented for the determination of radiative properties of Al2O3 particles in the high altitude plume of a solid propellant rocket. A polydisperse distribution of non-gray particles is modeled as an emitting, absorbing and scattering medium of arbitrary optical thickness. Strong two-way coupling is allowed between radiation and flowfield calculations, where the gas is simulated using the direct simulation Monte Carlo method and particle phase properties are determined using a similar Lagrangian approach. Effects of anisotropic scattering and nozzle searchlight emission are considered, and a procedure is described for the calculation of spectral radiance. The model is applied to the simulation and radiation analysis of the freely expanding plume from a subscale solid rocket motor, and various flowfield properties are presented and discussed.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2005
Accession Number
ADA435725

Entities

People

  • Iain D. Boyd
  • Jonathan Burt

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Altitude
  • Computational Fluid Dynamics
  • Energy
  • Energy Transfer
  • Heat Energy
  • Heat Of Fusion
  • Heat Transfer
  • High Altitude
  • Latent Heat
  • Materials
  • Monte Carlo Method
  • Particle Size
  • Particles
  • Phase Transformations
  • Radiation
  • Scattering
  • Solid Propellants

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Computational Fluid Dynamics (CFD)
  • Spectroscopy.