Accession Number:

ADA801331

Title:

Theory and Application of Hot-Wire Instruments in the Investigation of Turbulent Boundary Layers

Descriptive Note:

Wartime rept.

Corporate Author:

NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Personal Author(s):

• Schubauer, G. B.
• Klebanoff, P. S.

Report Date:

1946-03-01

Pagination or Media Count:

63.0

Abstract:

An account is given of the recent developments in hot-wire instruments for use in turbulent boundary layers to determine the magnitude of the several components of the turbulent velocity fluctuations together with the correlation between them and turbulent shearing stress. The instruments were developed in order to make possible a study of the turbulent characteristics of the layer as well as the average characteristics in a general investigation of the turbulent boundary layer under conditions producing separation. The experimental setup used to provide a thick turbulent boundary layer is described, and results are included to show the general nature of the boundary layer, as well as examples of the measured fluctuations, correlation coefficient, and turbulent shearing stress. Finally the errors inherent in the hot-wire method are discussed.

Descriptors:

• *INSTRUMENTATION
• *HOT WIRE
• AERODYNAMICS
• FLIGHT INSTRUMENTS
• TURBULENT BOUNDARY LAYER
• TURBULENT FLOW

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE