An Analysis of Cavitation Activity at Orifices of the FFG-7 Seawater Piping System
Abstract
An analytical investigation has been made of cavitation in a number of pairs of orifice plates installed within the seawater cooling pipe lines of FFG-7 guided missile frigates. Four lines, where excessive noise and erosion have been reported, have been analysed; these are, the fire main recirculating line, the gas turbine start and bleed air cooler lines, and the prairie air cooler line. The results show that all circuits operate at exceedingly high levels of cavitation, much higher than the usual acceptable limit. The fire main line may suffer from supercavitation, possibly causing damage down stream from the second orifice. Sample design studies indicate that a simple multiple orifice plate arrangement may eliminate the problem. Flow rates, Pressure, Cavitation, Orifice plates, Pipe erosion, Ship noise, Orifice cavitation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1993
- Accession Number
- ADA268805
Entities
People
- M. Castillo
Organizations
- Defence Science and Technology Group