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Effect of Surface Roughness on Characteristics of Spherical Shock Waves (1959)

McFarland, Donald R. ; Huber, Paul W.

In: CASI

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Publication Date: 2019-08-15

Description: Measurements of peak overpressure and Mach stem height were made at four burst heights. Data were obtained with instrumentation capable of directly observing the variation of shock wave movement with time. Good similarity of free air shock peak overpressure with larger scale data was found to exist. The net effect of surface roughness on shock peak overpressures slightly. Surface roughness delayed the Mach stem formation at the greatest charge height and lowered the growth at all burst heights. A similarity parameter was found which approximately correlates the triple point path at different burst heights.

Keywords: Fluid Mechanics and Heat Transfer

Type: NASA-TR-R-23

Format: application/pdf

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