ISO 23453:2022

INTERNATIONAL ISO
STANDARD 23453
First edition
2022-12
Ships and marine technology —
Guidelines for the design and
manufacture of the hub cap with fins
for a fixed-pitch marine propeller
Reference number
© ISO 2022
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Guidelines for HCWF design and manufacture . 2
4.1 Hydrodynamic performance and energy-saving effect evaluation . 2
4.2 Manufacture. 2
4.3 Tightness test . 3
4.4 Accessibility . 3
5 Hydrodynamic design procedure of HCWF . 3
5.1 Applicability analysis . 3
5.2 Preliminary principle dimensions and main parameters . 3
5.3 Pitch and camber distribution . . 3
5.4 V erification with open water testing . 3
5.5 V erification using full-scale tests . . 5
6 Strength check of HCWF . 5
6.1 Strength check method of HCWF . 5
6.2 Strength check method of connecting bolts between HCWF and propeller . . 6
Bibliography . 7
iii
Foreword
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This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 8, Ship design.
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iv
Introduction
A hub cap with fins is an energy-saving device installed behind a propeller instead of a propeller hub
cap. It rotates together with the propeller to increase the propulsion efficiency of the ship by decreasing
the energy losses caused by hub vortex. To save energy and reduce underwater noise, propeller hub
caps with fins are installed on a wide variety of ships.
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INTERNATIONAL STANDARD ISO 23453:2022(E)
Ships and marine technology — Guidelines for the design
and manufacture of the hub cap with fins for a fixed-pitch
marine propeller
1 Scope
This document provides general guidelines for design and manufacture of a hub vortex energy-saving
device for a fixed-pitch marine propeller. This document can also apply to the design and manufacture
of hub vortex energy-saving device for other types of marine propellers.
According to the specific geometrical shape of the propeller and other specifications, it is suggested
that hub cap with fins is used in merchant ships.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following address
...