Micro-bubbles Reduce Drag
Advertise Here
Trending Topics:
Monday, January 26, 2015

Ship Equipment
Ship Maintenance
Ship Systems
Worldwide Metric
Freeman Marine
Neptune Group

Home Page
About MarineTalk
Buyer's Guide
World InfoDesk
Discussion Forums
Advisory Board
Advertising Information
Submit Company Listing
Edit Company Listing
Site Map
MarineTalk Site Search:
Featured Companies

Electricfor S.A.
One of Electricfor's speciality is to build any type of electric heater elements from a provided design or based on discussions with one of our technical representatives.

Royal Danish Naval Technical School
The school gives training and education in technical matters, primarily for technical personnel of the navy.Furthermore the school offers diving education,training in fire fighting, da- mage control,ship´s stability,NBCDprotection,fighting pollution

ICC International Maritime Bureau(IMB)
The IMB is a division of the International Chamber of Commerce, the world business organisation, set up to look into fraud and malpractice in shipping and trading. The IMB has one of the most comprehensive records on piracy worldwide.
    United Kingdom

CLIPSO PRODUCTIONS is the leader in manufacturing PVC-FREE wide width stretch coverings for walls and ceilings. Lightweight, design, acoustic, CLIPSO fabrics are IMO, CE and Oeko-Tex certified to fulfill any of your wishes.

Micro-bubbles Reduce Drag


Ishikawajima-Harima Engineering has assessed the effects of drag reduction by micro-bubble injection. Long ship models with flat bottoms were used in experiments. The local skin friction and the total drag of 8 m, 20 m, and 40 m long slender ship models were measured while injecting micro-bubbles from porous plate during towing. The micro-bubbles were observed by CCD camera. Drag reduction was obtained by injecting micro-bubbles in all experimental cases. A maximum drag reduction was about 60% in frictional drag on the part of the flat bottom covered by micro-bubbles. Reduction of local skin friction was evident as far as about 40 m downstream from the injection point, although the reduction decreased with distance.
Ishikawajima-Harima Engineering Review March 1999, Vol. 39 No. 2 pp. 89-93
More information: IHI


You may also like:
Trending Technology, World Shipping & Maritime News

Latest Marine News and Technology Articles | Maritime 2015 Buyer's Guide


E-mail:  Contact Us

Copyright © 1998 - 2015 MarineTalk
Division of Link Internet Business Solutions
All rights reserved.

The reproduction, retrieval, copying or transmission of this Web site content,
in whole or in part, is not permitted without the express permission of
MarineTalk .