A Three-Dimensional Axisymmetric Calculation Procedure for Turbulent Flows in a Radial Vaneless Diffuser

Abstract

An analytical model is proposed to calculate the three-dimensional axisymmetric turbulent flowfield in a radial vaneless diffuser. The model assumes that the radial and tangential boundary layer profiles can be approximated by power law profiles. Then, using the integrated radial and tangential momentum and continuity equations for the boundary layer and corresponding inviscid equations for the core flow, there results six ordinary differential equation in six unknowns which can easily be solved using a Runge- Kutta technique. A model is also proposed for fully developed flow. The results using this technique have been compared with the results from a three- dimensional viscous, axisymmetric duct code and with experimental data and good quantitative agreement was obtained. Additional keywords: Antrifugal compressors; numerical analysis; charts.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1984
Accession Number
ADA157113

Entities

People

  • Lawrence F. Schumann

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Axisymmetric
  • Boundary Layer
  • Boundary Layer Flow
  • Centrifugal Compressors
  • Computational Science
  • Differential Equations
  • Equations
  • Experimental Data
  • Geometry
  • Mechanical Engineering
  • Numerical Analysis
  • Numerical Integration
  • Radial Velocity
  • Skin Friction
  • Static Pressure
  • Three Dimensional
  • Turbulent Flow

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)