Rise-time response of nickel-foil-on-Kapton-substrate, hot-film, shear-stress sensorsAn existing nickel-foil-on-Kapton-substrate sensor design was modified by including two heated elements in an attempt to minimize or reduce substrate conduction effects. The rise-time responses of the original and modified sensors were then investigated in unsteady flows of 0.5-1-s duration, consistent with flows encountered in wind-energy applications. The results obtained indicate a measurable degradation in transient performance due to the activation of the dynamic guard heater. Transient heat conduction within the substrate remains the limiting factor in such applications.
Document ID
19910036769
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Reda, Daniel C. (NASA Ames Research Center Moffett Field, CA, United States)