Stern Flap Design

[manishindian979]

Hey guys. Can you suggest me some papers or books where I can find the design techniques for stern flaps for energy saving?

 

[gonzo]

Do you mean "trim tabs"?

 

[TANSL]

I think not. I think what he means is: "stern flaps for energy saving". It is similar but not the same.

 

[Mr Efficiency]

http://greenfleet.dodlive.mil/files/2011/09/20110830_SternFlapsEnergyFactsheet.pdf

 

[CDBarry]

Here is some material relating to the use of stern flaps on USCG 110' cutters:

U.S. Coast Guard Island Class 110 WPB: Stern Flap Evaluation and Selection (Model 5526) - NSWCCD Report - www.dtic.mil/dtic/tr/fulltext/u2/a372316.pdf

Hydrodynamic Efficiency Improvements to the USCG 110 Ft WPB ISLAND Class Patrol Boats
http://www.sname.org/communities1/r...umentKey=92510f58-0487-4305-9bef-576a096a1ce5
SNAME Annual Meeting Paper (also on 1st SNAME small craft CD)

www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA400106

There is also a paper that was given at the WorkBoat show by Dominic Cusanelli covering the subject for a range of ship types, and a similar Professional BoatBuilder article, but I can't find the links.

So far it appears that either model tests or high level CFD is required.

 

[manishindian979]

Thanks to all of you. But I have read all these articles. I still am not able to understand the thickness requirements. Might be some CFD analysis can reveal the facts. I still don't think that root thickness will be playing any major role. However the shape of the cross section may do that. Can you guess if am right or going drastically wrong?