Application of the flush mounted hot film gauge for measuring blast wave surface shear

TLDR: In this paper, the fast response capability of the hot film shear gauge was used to perform unique shock tube and field test blast wave surface shear measurements, and mean flow turbulent calibration data were presented from three different test facilities: a low speed wind tunnel, a high pressure pipe facility, and a laboratory scale shock tube.

Abstract: Use is made of the fast response capability of the hot film shear gauge to perform unique shock tube and field test blast wave surface shear measurements. Mean flow turbulent calibration data are presented from three different test facilities: a low speed wind tunnel, a high pressure pipe facility, and a laboratory scale shock tube. Favorable agreement in calibration data between the three facilities is demonstrated. The good correlation in calibration results validates the ‘‘established’’ formulation procedure and provides a unique verification of available shock tube shear data. Measurements of ground shear under clean wall, i.e., nondusty, flow conditions are reported for blast waves created by high explosive detonations under large scale field test conditions. Satisfactory scaling of results in terms of event yield and overpressure location is demonstrated.