An Experimental and Theoretical Investigation of Conic Entrance Orifice Performance in the Low Reynolds Number Domain

Abstract

A constant discharge coefficient (Cd), relating flow rate to the square root of the differential pressure across a primary element, is a desirable characteristic of any flow sensor to be used in shipboard automatic control systems. Although the simple, square edged orifice meets this criterion for turbulent flows, Cd does not remain constant for applications in the laminar and transitional regions of pipe Reynolds number (ReD). In a quest for a device which exhibits both simplicity and constant Cd at low ReD, twelve conic entrance orifice plates were tested.

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Document Details

Document Type
Technical Report
Publication Date
Apr 18, 1972
Accession Number
AD0743479

Entities

People

  • Ronald F. Bruner

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Energy Conservation
  • Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Fuel Oils
  • Geometry
  • Hydrodynamics
  • Measurement
  • Mechanical Engineering
  • Pipe Flow
  • Quadrants
  • Reynolds Number
  • Square Roots
  • Steady Flow
  • Steady State

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design