VMP Waterjet Test Results,
Abstract
This report presents the results of a series of waterjet experiments using twin, nearly vertical inlets and a nozzle with an underwater discharge conducted on a 1:24.8 scale model of a DDG 51 hull. The aft end of the hull was redesigned considerably both to accommodate the waterjet and to take advantage of potential propulsor/hull interactions. This is a unique application. The DDG 51 parent hull is a displacement hull operating at speeds lower than what is typical for waterjets. In addition, the aft portion of the hull, the waterjet inlet, and the nozzle were executed as an integrated design to investigate taking advantage of both boundary layer and afterbody flows. Total pressure, static pressure and velocities are presented at three measuring stations, one along the hull a short distance upstream of the waterjet inlet, the second inside of the inlet and the third in the jet a short distance downstream of the nozzle discharge. Surface pressure measurements along the hull, both upstream and downstream of the inlet, and within the duct are also presented. A powering analysis of the results compared with a propeller driven hull indicated that the power requirement of the waterjet equipped hull was comparable and on the low side.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1999
- Accession Number
- ADA362376
Entities
People
- Charles M. Dai
- James W. Hickok
- John F. Mcmahon
- John G. Hoyt Iii
- Roderick W. Burke
Organizations
- Naval Surface Warfare Center Carderock Division