Accession Number:

AD0837113

Title:

A SYSTEM FOR MEASURING DYNAMIC FLOW PROPERTIES IN AIRFOIL BOUNDARY LAYERS,

Descriptive Note:

Corporate Author:

ARMY AERONAUTICAL RESEARCH LAB MOFFETT FIELD CA

Personal Author(s):

• Durbin, Enoch

Report Date:

1968-01-01

Pagination or Media Count:

15.0

Abstract:

The paper is concerned with analysis of a method for ascertaining flow direction and magnitude in the rotor boundary-layer region as an indication of shear stress by the use of direction sensitive electrically heated surface film sensors which are powered in a feedback double bridge constant temperature system. The report concerns itself with a discussion of the basic idea of this system together with a theoretical analysis of the errors associated with such a system. Author

Descriptors:

• (*HELICOPTER ROTORS
• AERODYNAMIC CHARACTERISTICS)
• BOUNDARY LAYER
• FLOW FIELDS
• AIRFOILS
• SHEAR STRESSES
• DETECTORS
• FEEDBACK
• CONVECTION(HEAT TRANSFER)
• HEAT OF COMBUSTION
• THERMAL CONDUCTIVITY
• VOLTAGE
• EQUATIONS
• ERRORS

Subject Categories:

• Helicopters
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE