The BRL-Q1D: A Tool for the Numerical Simulation of Flows in Shock Tubes with Variable Cross-Sectional Areas

Abstract

The BRL-Q1D code is a computer program that uses quasi-one- dimensional, adiabatic, inviscid, numerical algorithms to solve the Euler equations. The governing equations are derived for arbitrary geometry and transformed into a uniform computational grid. An implicit Beam-Warming solver and an explicit MacCormack solver are employed. The input requirements, the code structure and the output options are discussed. Various flow calculations with the BRL-Q1D code are verified against experiments. Calculations are performed using the experimental geometries and test conditions of a conventional shock tube, a small-scale blast-simulator model and the large blast simulator at the experimental data validates the numerical flow simulation. In addition, two methods are discussed which are helpful for improving the computational prediction.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA174254

Entities

People

  • Andrew Mark
  • Klaus O. Opalka

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Counter WMD
  • Cyber
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Blast
  • Computational Fluid Dynamics
  • Computational Science
  • Difference Equations
  • Differential Equations
  • Dynamic Pressure
  • Equations
  • Euler Equations
  • Experimental Data
  • Fluid Dynamics
  • Geometry
  • Military Research
  • Navier Stokes Equations
  • Operating Systems
  • Shock Tubes
  • Simulations
  • Simulators

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Dynamics.
  • Instructional Design and Training Evaluation.