Accession Number:

AD0860314

Title:

Turbulent Flow Separation Ahead of Forward Facing Steps in Supersonic Two-Dimensional and Axisymmetric Flows

Descriptive Note:

Technical note

Corporate Author:

VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s):

• Uebelhack, H. T.

Report Date:

1969-07-01

Pagination or Media Count:

45.0

Abstract:

Pressure distributions in the separated flow region ahead of forward facing steps and on the step face in supersonic turbulent flows obtained at VKI are compared with those found by previous investigators. Parameters such as step height, unit Reynolds number and Mach number were compared. It was intended, in particular, to relate the axisymmetric results to existing two-dimensional data. A general law relating the variation of the step pressure integral with Mach number was found by analyzing pressure distributions on the step face. The influence of flow inclination, Mach number variation and three-dimensional effects on the characteristic pressures were discussed. The flow has been visualized by schlieren and shadow photographs and by the oil flow technique.

Descriptors:

• *FLOW SEPARATION
• *AIRCRAFT PROTUBERANCES
• MATHEMATICAL MODELS
• LOAD DISTRIBUTION
• SHOCK WAVES
• TURBULENCE
• FLOW VISUALIZATION
• FLOW FIELDS
• CYLINDRICAL BODIES
• CONICAL BODIES
• SUPERSONIC DIFFUSERS
• BELGIUM
• FLAT PLATE MODELS
• WIND TUNNEL MODELS
• REYNOLDS NUMBER
• PRESSURE
• WALLS
• ATTACHMENT
• MACH NUMBER
• SUPERSONIC FLOW
• DRAG
• SUPERSONIC CHARACTERISTICS

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE