Accession Number:

AD0697648

Title:

BALANCE FOR MEASURING SKIN FRICTION IN THE PRESENCE OF HEAT TRANSFER

Descriptive Note:

Final rept.

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Report Date:

1969-06-10

Pagination or Media Count:

16.0

Abstract:

The development of a skin-friction balance to be used in a wind tunnel with heat-transfer conditions is described. The balance is a null-type device with a floating head element whose temperature can be maintained between 100K and 345K. This is accomplished with a cooled or heated jacket that is placed in direct contact with the friction element. At the desired element temperature the jacket is separated from the element and the shear-force data is taken. The balance was used in a Mach 5 supersonic flow with moderate heat- transfer rates. Shear forces ranging from 0.05 gmsq cm to 1 gmsq cm have been measured and higher ranges can be obtained by simply changing a coil spring.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE