SYMPOSIA PAPER Published: 01 January 1974

Influence of Velocity, Impingement Angle, Heating, and Aerodynamic Shock Layers on Erosion of Materials at Velocities of 5500 ft/s (1700 m/s)


The dependence of materials erosion in rain at supersonic velocities up to 1700 m/s (5500 ft/s) has been determined as a function of velocity, impingement angle, and aerodynamic heating. The erosion rate of materials has been found to vary with the 4.5 to 6.5 power angle. Coupled heating and erosion effects are highly significant for polymeric composites. The effects of shock layer breakup, acceleration, deflection, and deformation of the droplets have been quantitatively assessed, and damage gradients in materials are shown to be a function of primarily droplet distortion and breakup resulting from drop traversal of the shock layer around the vehicle.

Author Information

Schmitt, GF
Air Force Materials Laboratory, Ohio
Reinecke, WG
Avco Corporation, Wilmington, Mass.
Waldman, GD
Avco Corporation, Wilmington, Mass.
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Developed by Committee: G02
Pages: 219–238
DOI: 10.1520/STP32232S
ISBN-EB: 978-0-8031-4650-1
ISBN-13: 978-0-8031-0335-1