THE INFLUENCE OF POROSITY AND CONTACT ANGLE ON INCIPIENT AND DESINENT CAVITATION
Abstract
The investigation was primarily devoted to the determination of the effect of porosity and contact angle on incipient and desinent cavitation. The primary test models were 1/4-inch diameter hemispherical-nosed bodies made of teflon, rubber, polyethylene, stainless steel and glass. The test results imply that the hydrophobic surfaces, i.e., teflon and polyethylene models, contribute surface nuclei to the inception process provided that the surface nuclei are in a normal condition, i.e., no effort has been made to minimize surface nuclei by extreme pressurization, etc. On the other hand, the hydrophilic hemispherical models made of glass and stainless steel seem to show no contribution of surface nuclei to the onset of cavitation and may depend entirely on the stream nuclei for cavitation. However, the rubber model which was hydrophilic in nature was not consistent with the other hydrophilic models.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 1969
- Accession Number
- AD0700919
Entities
People
- Surender K. Gupta
Organizations
- Pennsylvania State University