CORRELATION OF THE BASE-PRESSURE BEHIND A TWO DIMENSIONAL BACKWARD FACING STEP IN A LAMINAR SUPERSONIC FLOW,

Abstract

Pressure disribution over two-dimensional backward-facing step models is measured at Mach 2.25 and 3.55. The Reynolds numbers (based on flat plate length L) in these tests vary between 0.5x10 to the fifth power and 5x10 to the fifth power. In the laminar flow case, the base pressure was found to correlate with the single para meter delta X sub sh/L in accordance with the base flow theory which is based on the CroccoLees mixing concepts. The mixing parameter C is found to be approximately 15 when the mixing region thickness is defined at u/u sub e =0.95. This value for C agrees with the mixing parameter value found in the shock wave-laminar boundary layer case by Glick. This result supports the a priori assumption of the mixing theory that the mixing parameter C be independent of external flow Mach number and Reynolds number. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1962
Accession Number
AD0429812

Entities

People

  • J. Rom
  • M. Victor

Organizations

  • Technion – Israel Institute of Technology

Tags

DTIC Thesaurus Topics

  • Base Flow
  • Base Pressure
  • Boundary Layer
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Laminar Boundary Layer
  • Laminar Flow
  • Layers
  • Mach Number
  • Reynolds Number
  • Shock Waves
  • Supersonic Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Analytical Mechanics
  • Fluid Mechanics and Fluid Dynamics.
  • Statistical inference.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flow