Accession Number:

AD0730527

Title:

Experimental Study of the Thermal Wake Interference between Closely Spaced Wires of a X-Type Hot-Wire Probe,

Descriptive Note:

Corporate Author:

BRITISH COLUMBIA UNIV VANCOUVER INST OF OCEANOGRAPHY

Personal Author(s):

Report Date:

1970-03-01

Pagination or Media Count:

8.0

Abstract:

In constructing an X-type hot-wire probe it has been the usual policy to place the two wires forming the X close to each other to assure that they are both measuring in effectively the same plane. Recent experiments, however, have shown that an X-wire probe which has two wires almost in the same plane is quite sensitive to movements of the velocity vector out of that plane, because of the influence on one wire of the hot wake produced by the other. In this note a Disa X-type probe, with the wires 015 mm apart, is tested and found to have a static sensitivity to small angles of pitch, which is very significant for low wire Reynolds numbers but becomes small for Reynolds number greater than 10. A modified probe having the wires one wire length apart is suggested and tested. Author

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE