Accession Number : AD0428477

Title :   DESIGN AND CONSTRUCTION OF NEW CAVITATION MACHINE,

Corporate Author : BUREAU OF RECLAMATION DENVER COLO

Personal Author(s) : Karpoff,Comp. by K. P.

Report Date : 18 NOV 1963

Pagination or Media Count : 7

Abstract : A new simplified Venturi-type apparatus with a single test compartment was designed. This apparatus is operated by a 60 hp electrical pump driven at 1,500 rpm resulting in about 150 feet of pressure head, 98 ft/sec velocity and 2.1 cfs discharge of water through 1/4 by 12-inch throat of the cavitation test apparatus. The series of trial runs of the cavitation test apparatus, using a transparent plastic plate in place of the usual specimen, show that the center of the vapor collapse area is located directly under the specimen, when the upstream and downstream pressures are 59.0 and 17.8 psi gage respectively, resulting in 41.2 psi or 95 feet of differential hydraulic pressure. Evaluation of cavitation resistance of different types of tested materials is based on complete surface destruction occurring in a percentage of 250 hours which was the maximum period used in the laboratory test. (Author)

Descriptors :   (*CAVITATION, TEST FACILITIES), (*HYDRAULIC EQUIPMENT, CAVITATION), WEAR RESISTANCE, MACHINES, HYDRAULIC MODELS, MATERIALS, COATINGS, SURFACES, SURFACE PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE