Journal Published Online: 01 May 1980
Volume 8, Issue 3

Erosion and Cavity Characteristics in Rotating Components



An investigation of the initiation and growth of erosion and of the effect of velocity and pressure on erosion in a rotating disk is presented. Also, the role of an intervening noncavitating period on erosion is studied. The results indicate that at high intensities the peak rate of erosion decreases with increases in pressure. The erosion rate/time curves obtained for metallic materials are explained by the eroded particle distribution and the cavity size. The average size of the eroded particles decreased when pressure and tensile strength of the material were increased. The erosion rate peaked after an intervening noncavitating period. The use of the rate of erosion, defined as an average over the entire test duration, in the equation governing the theory of erosion resulted in reasonably good correlations. The correlations reveal that it is possible to predict the length, width, and area of a cavity when the cavitation parameter σ is known. The normalized width of a cavity may be estimated if its normalized length is known.

Author Information

Veerabhadra Rao, P
Tata Consulting Engineers, Carnac, Bombay, India
Syamala Rao, BC
Indian Institute of Science, Bangalore, India
Lakshmana Rao, NS
Indian Institute of Science, Bangalore, India
Pages: 16
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Stock #: JTE10609J
ISSN: 0090-3973
DOI: 10.1520/JTE10609J