Accession Number:

AD0777385

Title:

Compressible Turbulent Skin Friction on Rough and Rough/Wavy Walls in Adiabatic Flow

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

• Reda, Daniel C.

Report Date:

1974-02-12

Pagination or Media Count:

68.0

Abstract:

An experimental program was conducted to investigate effects of roughness, and roughness superimposed on single andor multiple, shallow, periodic waveforms, on turbulent boundary-layer skin friction and velocity profile, in compressible, adiabatic flow. Test conditions were Mach number 2. 9 and Reynolds numberft 2 million to 8 million. The planar models included smooth, sand-grain, machined and molded surface finishes. Direct measurements of surface shear and Pitotrecovery temperature profiles were obtained.

Descriptors:

• *SKIN FRICTION
• *SURFACE ROUGHNESS
• *TURBULENT FLOW
• *WALLS
• ADIABATIC GAS FLOW
• BOUNDARY LAYER
• GRAPHICS
• MODEL TESTS
• TEST EQUIPMENT
• TEST METHODS

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE