Scaling Effects on Stern Flap Performance. Progress Report
Abstract
The installation of a prototype stern flap on the USS RAMAGE (DDG 61), the 11th destroyer of the DDG 51 Class, with associated stern flap evaluation trials, has provided invaluable information towards the continuation of the stern flap scale effects investigation. Comparison of stern flap trials results on RAMAGE, to that of a geosim model experiment series, was utilized for the refinement of techniques for extrapolation of model test data to full-scale performance. A practical technique, by which full-scale stern flap performance at sea could be projected from model-scale experimental data, is presented. An analysis tool for evaluating stern flap scaling effects, to be utilized with model-scale experimental results, to better project full-scale stern flap performance, was formulated. This formulation has several distinct advantages over its predecessor. Foremost, is the inclusion of the RAMAGE trials data in the updated version. In addition, the stern flap scale effects, as represented in this analysis tool, are dependant on not only the tested model scale ratio and speed range as before, but also on the magnitude of the model-scale performance relative to that of the study case.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 2009
- Accession Number
- ADA507858
Entities
People
- Dominic S. Cusanelli
Organizations
- Naval Surface Warfare Center Carderock Division