Experimental investigation of shock wave diffraction over a single- or double-sphere model

In this study, the unsteady drag produced by the interaction of a shock wave with a single- and a double-sphere model is measured using imbedded accelerometers. The shock wave is generated in a horizontal circular shock tube with an inner diameter of 200 mm. The effect of the shock Mach number and t...

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Bibliographic Details
Published in:Shock waves 2017, Vol.27 (1), p.97-107
Main Authors: Zhang, L. T., Wang, T. H., Hao, L. N., Huang, B. Q., Chen, W. J., Shi, H. H.
Format: Article
Language:English
Subjects:
Acceleration measurement
Accelerometers
Acoustics
Condensed Matter Physics
Dimensionless numbers
Drag coefficients
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Fast Fourier transformations
Fluid- and Aerodynamics
Heat and Mass Transfer
Mach number
Original Article
Polynomials
Thermodynamics
Wave diffraction
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Summary:In this study, the unsteady drag produced by the interaction of a shock wave with a single- and a double-sphere model is measured using imbedded accelerometers. The shock wave is generated in a horizontal circular shock tube with an inner diameter of 200 mm. The effect of the shock Mach number and the dimensionless distance between spheres is investigated. The time-history of the drag coefficient is obtained based on Fast Fourier Transformation (FFT) band-block filtering and polynomial fitting of the measured acceleration. The measured peak values of the drag coefficient, with the associated uncertainty, are reported.
ISSN:0938-1287
1432-2153
DOI:10.1007/s00193-016-0641-4