On the Evaluation of Gas Flow Resistance Measurement Through Packed Beds

Abstract

Interior ballistic prediction rely on submodels and submodel measurements. An important parameter is the coefficient of drag. These have been measured on the basis of steady flow through inert packed beds. Results have been presented in the form of coefficient of drag vs. Reynolds number divided by 1-4, where is the porosity of the bed. With improved statistical tools, it was felt that the existing data might be put into a form which would better reflect the actual measurements. In the report, we show that indeed this is the case. Minimizing the root-mean-square en-or (RMSE), a commonly used measure of the adequacy of fit, a new relationship is obtained. The new fit reduces the RMSE by 20%.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1992
Accession Number
ADA255302

Entities

People

  • C. K. Zoltani
  • M. S. Taylor

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Artillery
  • Data Science
  • Flow
  • Fluid Flow
  • Gas Flow
  • Information Science
  • Jet Propulsion
  • Measurement
  • Mechanical Engineering
  • Military Research
  • Physics
  • Physics Laboratories
  • Regression Analysis
  • Reynolds Number
  • Statistical Analysis
  • Steady Flow
  • Steady State

Readers

  • Combustion and Flow Dynamics.
  • Computational Modeling and Simulation
  • Materials Science.