The Specialist Committee on Azimuthing Podded Propulsion Report and - PowerPoint PPT Presentation

The Specialist Committee on Azimuthing Podded Propulsion Report and Recommendations Noriyuki Sasaki , National Maritime Research Institute Δ = Δ + Δ + Δ + Δ R R R R R POD BODY STRUT INT LIFT ⎛ ⎞ ) 1 ( R BODY = 1 + k BODY 2 C F ρ V 2 S ⎜ ⎟ ⎝ ⎠ 0.016 0.014 0.012 0.01 Cf 0.008 0.006 0.004 0.002 0 0.0E+00 5.0E+05 1.0E+06 1.5E+06 2.0E+06 2.5E+06 Rn_L

Membership Maritime Research Institute Netherlands (MARIN), Wageningen, The Netherlands. Ir. Jaap H. Allema. Professor Mehmet Atlar. ( Former Chairman ) University of Newcastle, Newcastle-upon-Tyne, United Kingdom. Samsung Heavy Industries Co. Ltd., Daejeon, Korea. Dr. Se-Eun Kim. Krylov Shipbuilding Research Institute (KSRI), St. Petersburg, Russia. Dr.Valery Borusevich. VTT Industrial Systems, Espoo, Finland. Dr. Antonio Sanchez-Caja. Istituto Nazionale per Studied Esperienze di Architettura Navale (INSEAN), Roma, Dr. Francesco Salvatore. Professor Chen-Jun Yang (Secretary). Shanghai Jiao Tong University (SJTU), Shanghai, China. National Maritime Research Institute (NMRI), Tokyo, Japan. Dr. Noriyuki Sasaki (Chairman).

Outline 1. General 2. Questionnaires 3. Review and update Procedure 7.5-02-03-01.3 4. Cavitation behaviour of podded propulsors with steering angles 5. Hydrodynamics of POD propulsion for ice applications 6. Technical Conclusions

1. General

Meetings (1) Tokyo, Japan, March 2006. (2) Brest, France, Octover 2006, in conjunction with the 2nd T-Pod Conference (3) St. Petersburg, Russia, June 2007 (4) Shanghai, China, March 2008. St. Petersburg(KSRI) Tokyo(NMRI)

Committee’s Tasks 1. Review and update Procedure 7.5-02-03-01.3 “Propulsion, Performance- Podded Propulsor Tests and Extrapolation”. Give special emphasis on how to scale housing drag and to the validation of full-scale propulsion prediction. 2. Continue the review of hydrodynamics of POD propulsion for special applications including fast ships, ice going ships (Liaise with the Ice committee) and special POD arrangements like Contra-rotating Propellers (CRP) and hybrids. Include the practical application of computational methods to prediction and scaling. 3. Review and analyse the cavitation behaviour of podded propulsors. Emphasize high pod angles and normal steering angles including dynamic behaviour. Include the practical application of computational methods to prediction and scaling.

Task Distributions TASKS MA NS JA AS SEK FS CJY VB Kawanami Kume Ohhashi Type of Instruments ○ ○ ◎ ○ ○ ○ ○ ○ Unit Thrust Mes. ○ ○ ◎ ○ ○ ○ ○ ○ Prop. Thrust Mes. ○ ○ ◎ ○ ○ ○ ○ ○ Prop. Torque Mes. ○ ○ ◎ ○ ○ ○ ○ ○ Idle Thrust Mes. ○ ○ ◎ ○ ○ ○ ○ ○ Idle Torque Mes. ○ ○ ◎ ○ ○ ○ ○ ○ Model Ｔｅｓｔ Procedure Gap Effect ◎ ○ ○ ○ SFC at SPT ◎ ○ ○ ○ Driving System ◎ ○ ○ ○ Air Draw ◎ ○ ○ ○ DATA Prosessing ◎ ○ ○ ○ Ｏｔｈｅｒｓ ○ ○ ○ ○ Propeller Base ◎ Ｓｃａｌｉｎｇ Ｂａｓｅ Unit Base ◎ Unit Thrust Correction ◎ ○ Wake Scaling ◎ ○ Powering Sea Trial ○ ◎ ○ ○ ○ ○ ○ Monitoring ○ ◎ ○ ○ ○ ○ ○ Hybrid CRP ○ ◎ Crash Stop ◎ ○ Ice ◎ ○ Special Theme Crabbing ◎ ○ Sea Keeping ◎ ○ Others ○ Simulation of R.T ◎ ○ ○ ○ Simulation of S.P.T. ◎ ○ ○ ○ Simulation of Full Scale ◎ ○ ○ ○ CFD Application Maneuvering ◎ ○ ○ ○ Sea Keeping ◎ ○ ○ ○ Others ○ ○ ○ ○

History of Podded Propulsion 1993 submarine, war ships, ice breaker, cruise ice breaker ships Uikku 1991 electric propulsion 1995 cruise ship FANTASY 2002 ELATION HATAKAZE double acting tanker 2002 TEMPERA 2005 DAS Queen Mary II FAST POD TRITON SES HAMANASU

Combined pod and waterjet setup, Atlar et al (2006) The hybrid system is composed of two steerable (wing) pod drives and two fixed (central) – booster – flush type water jets

Contra-rotating Pod Propellers Super Eco Ship Project Slender shaped pod 2 shafts – 2 electrical motors

Pure CRP Pods (Mechanical Drive) on the Shiga Maru Shige Maru is one of the ships delivered as “Super Eco Ship”. The Super Eco Ship project was led by Ministry of Land, Infrastructure and Transport and National Maritime Research Institute from 2001.

Pump jet pod (PJP) unit , Bellevre et al. (2006). A comprehensive numerical and experimental design study was conducted for 2 cruise liner type pod units (13MW) for a 45000 GRT cruise liner using 2D-3D RANS codes. Based upon this comparative study it was concluded that the propulsive performance of PJP was 14% higher than the conventional tractor pod mainly due to its superior open water efficiency.

2. Questionnaires

We sent following questionnaire to 40 organizations and received 20 replies. 25th ITTC Specialist Committee on Azimuthing Podded Propulsion Questionnaire on Model Test Procedure, Powering Method and CFD Computation Method for Podded Propulsion System Introduction The task assigned by the 25th ITTC to this specialist committee is to develop and validate practical experimental and numerical prediction procedures for full scale performance of Azimuthing podded Propulsion System. As a first step toward accomplishing the task, the committee developed the following questionnaire to assess current practices in use by various organizations, including the ITTC member organizations. The analysis of the responses to the Nation Organazation questionnaire will be presented to the 26th ITTC conference as part of the final report of this specialist committee. CN SJTU CN DUT The questionnaire consists of six(6) parts: (A) Propeller Open Water Test, (B) Podded Propeller Open Water Test, (C) Resistance & Self Propulsion Test, (D) Powering, (E) FI VTT CFD application (F) Special theme. You do not have to complete all the sections or questions of the questionnaire. If you are not in a position to answer the IT INSEAN questionnaire at all, then a null response would be appreciated. If that is the case, JP NMRI please fill in the Respondent’s Information only and return. JP IHIMU Please ease r return rn t the e co complete ted for form prefe eferably ably b befo fore re 25 25th/Sep ept./20 t./2006. fo for th r the co committee tee t to JP MHI eval aluate uate th the r e res esults i in ti time me. If yo If you fai fail to mee to meet th the d e deadline ple please tr e try y to to ret return an anyw yway a at your your JP SHIME suitabl sui able t e time. e. JP ASMB KR SSMB KR MOERI Respondent’s Information (Example) KR HMRI NL MARIN Name: Noriyuki Sasaki_______________________ UK UNCL Organization: National Maritime Research Institute UK Quinetic Position: Group Leader of Propulsors Research Group Mailing Address: , Shinkawa, Mitaka-shi, Tokyo 181-0004 GER HSVA JAPAN_____________________________ POL CTO Tel. No.: +81 422 41 3505______________________ SW SSPA Fax No.: +81-422 41 3053____________________ CA IOT E-Mail Address: sasaki@nmri.go.jp______________ Website: http://www.nmri.go.jp/ CA MU

Questions A series : Propeller Open Water Test for Pod Propulsion Experimental tank A-7 What is the standard Reynolds Number (based on Dp) A-1 What kind of experimental tank do you use? for the open water test? A. Towing Tank A. We don’t have any standard for it B. Circulation Water Channel (incl. Cavitation Tunnel) B. We have a standard Reynolds Number C. Both C. We have two standards D. Others A A B B C C D 0 1 4 4 Towing Tank 10 2 9 We have standard Rn = ******

Questions A series : Propeller Open Water Test for Pod Propulsion Diameter A-3 What is the diameter of propeller? 600 500 400 Dp [mm] 300 200 100 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 immersion A-11 How much is the propeller immersion, Im? 250 200 Im/Dp [%] 150 100 50 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Questions B series : Pod Propeller Open Water Test Survey Results of Gap Width B-3 What is the propeller gap between boss and pod housing? 6 Width of Gap [mm] 5 4 3 2 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Questions B series : Pod Propeller Open Water Test Survey Results on Propeller Immersion B-11 How much is the propeller immersion, Im? 250 200 Im/Dp [%] 150 100 50 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Questions C series : Pod Propeller Self Propulsion Test Survey Results on Propulsion Analysis Methods for Pod Propulsion Ships C-1 How do you analyze self-propulsion test? A A. Conventional way (regards pod housing as an appendage) B B. Unit base (regards pod unit as the propulsor) C. Both C 2 appendage 6 propulsor 11 regards pod unit as a propulsor

Questions D series : Powering to full scale Survey Results on Rn Correction Method D-1 If yes, what kind of correction method do you use for pod D-1 Do you assess the effect of Reynolds numbers on housing drag correction(s)? performance of Podded propulsor? A. Empirical A. Yes B. Semi-empirical A B. No C. CFD-base B D. Others( ) A C B D 1 3 5 3 7 14 We assess the effect of Reynolds numbers