Pubblicazione scientifica

Experimental Studies on Hydrodynamics of a Floater-Adjusted Wave Propulsion Device

FILONE TECNOLOGICO	TEMA
produzione e cattura

RIASSUNTO

ABSTRACT

Wave propulsion device (WPD) is a device that can directly absorb wave energy and convert it into forward thrust by using an oscillating hydrofoil. The concept of WPD has been proposed for many years and has been proved to be feasible as the dominating or assistant propulsion of ships. The main problem of such device is its low efficiency. A new idea to improve its efficiency is investigated in this paper by using small floaters to adjust the attack angle of the hydrofoil, which is halfactive and named as floater-adjusted wave propulsion device (FAWPD). The experimental tests show that the FAWPD can generate significantly more thrust compared with conventional designs.

INTRODUCTION

New technologies have been proposed widely in industrial practices in order to promote green energy and reduce emission. For example, green ship technologies have received more and more attention and the EEDI (Energy Efficiency Design Index) becomes an international convention in 2011 and takes into effect in 2013. It is enforced since 2015 and the ships failed to meet the EEDI standard will not be allowed by classification society or IMO. Thus developing new green ship technologies can be very helpful in the concept or initial design.

WPD is one of the green ship technologies, which can directly absorb wave energy and convert it into forward thrust. Generally speaking, the resistance of ship will increase when it navigates in waves, which leads to a speed loss and needs more power, meanwhile the responses of the ship due to waves will become violent.

However, some sea animals (i.e. whale and dolphin) can utilize the wave energy to swim, which was found firstly in the middle of the 18th century by an English whale catcher. They found that the floating dead whale swims faster than the ship in waves. This inspired many researchers investigate how to utilize wave energy to drive ships.

DATA

Data di pubblicazione: 31/07/2017

AUTORI

HAO HONGBIN
MA QINGWEI
LIAO KANGPING
ZHENG XING

ENTE DI AFFERENZA

COLLEGE OF SHIPBUILDING ENG HARBIN ENG UNIV
SCHOOL OF ENG & MATHEMATICAL SCIENCES CITY UNIV LONDON COLLEGE OF SHIPBUILDING ENG HARBIN ENG UNIV

RIVISTA

The 27th International Ocean and Polar Engineering Conference, 25-30 June, San Francisco, California, USA

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