A Forward Facing Step Study: The Step Height Less than the Boundary- Layer Thickness

Abstract

An experimental investigation involving a thick, adiabatic, naturally turbulent, two-dimensional boundary layer undergoing separation has been completed at the Naval Ordnance Laboratory (NOL). Forward facing steps (with attached end plates) were used to induce boundary-layer separation for the particular case where the step heights, h, were less than the boundary-layer thickness, delta. The tests were conducted at a free-stream Mach number of 4.9 with a range of unit Reynolds numbers varying from 0.8 x 10 to the 6th power per foot to 4.0 x 10 to the 6th power per foot. The pressure distributions measured in the separated region ahead of the steps were found to be functions of both Re sub delta and h/delta for the turbulent boundary-layer separation case where h < delta.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1973
Accession Number
AD0764512

Entities

People

  • Richard T. Driftmyer

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Equations
  • Flow Fields
  • Flow Separation
  • Mach Number
  • Ordnance Laboratories
  • Plastic Explosives
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Pressure Signatures
  • Pressure Transducers
  • Static Pressure
  • Turbulent Boundary Layer
  • Two Dimensional
  • Wind Tunnel Nozzles
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Analytical Mechanics
  • Electrical Engineering
  • Fluid Dynamics.