Show all publications

Flow analysis, design and testing of ducted propellers

AuthorsZondervan, G.J., Hoekstra, M., Holtrop, J.
Conference/JournalSNAME 11th Propeller and Shafting Symposium, Williamsburg, Virginia, USA
Date1 Sep 2006
This paper addresses the design and the testing of ducted propellers and illustrates how flow analysis can be used as a support. After a review of the working principles of a ducted propeller system by referring to well-known theoretical analyses, it describes developments in computational methods. In particular a numerical code simulating the viscous flow around a ducted propeller system in open water shows promising results. Since propellers in ducts are designed as quasi-open propellers, the estimation of the effective advance speed, influenced by the velocity field induced by the duct, is an important aspect. New estimates for dividing the induced flow field into a propeller and a duct contribution are given, which lead to better correspondence with experimental information. Polynomials describing the performance of the B-4-70 propeller in nozzle 19A are also provided, in addition to an empirical relation for the virtual pitch of the Ka-series propellers. Model testing of ducted propellers is evaluated against numerical simulation tools. It is concluded that, in spite of rapid developments in computational fluid dynamics, the propulsive performance of ducted propellers can still most accurately be assessed by model tests.


Contact person photo

GertJan Zondervan

Senior Project Manager

You will need an account to view this content

To view this content you will need a login account. If you already have an account you can sign in below. If you want an account then you can create one.

sustainable propulsioncfd developmentcfd/simulation/desk studiesmeasurements and controldata sciencetime-domain simulationsresistance and propulsionmarine systemspoweringmodel testingpropeller designpropulsionsimulations