PROGRESS REPORT 1 AUGUST-30 SEPTEMBER 1952. Contract No. N7 ONR-35805 (Brown Univ.)

Abstract

Calibration data in the M = 0.8 to 1.1 range for a section cont aining 3 dimensionally shaped upper and lower walls indicated satisfactory velocity distribution. The re-entry flow downstream of the slots was improved by inserting adjustable flaps. The elimination of flow instabilities by inserting an adjustable center body in the flow at the re-entry flaps is being investigated. Difficulty was encountered in correlating results of a study of the boundary layer characteristics of a variety of perforated walls. Data obtained with a jet open on 1 side to secure constant pressure along the test section and a knife edge which cut off the boundary layer prior to its reaching the perforated wall revealed suction values agreeing with values predicated by a simplified theory analogous to the theory of free-jet mixing.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1952
Accession Number
AD0002953

Entities

People

  • P. F. Maeder

Organizations

  • Brown University

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Calibration
  • Contracts
  • Directives
  • Displacement
  • Elimination
  • Instability
  • Layers
  • Mach Number
  • Motion
  • Physical Properties
  • Reflection
  • Revolutions
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Technical Research and Report Writing.
  • Theoretical Analysis.