Michael Schmiechen, Berlin
News on ducted propulsors

Performance of ducted propulsors
in open water assessed

In the meantime a corrected, improved and enlarged version
of the paper, originally prepared for SMP '11 at Hamburg,
has been submitted under the title

• On the merits of ducted propulsors
  for eventual publication in the special issue
  on 'Marine Propulsors and Current Turbines:
  State of the Art and Current Challenges'
  of the 'International Journal of Rotating Machinery'.
  
  Subsequently the author has been informed that the paper
  has been rejected based on the following
• Review report.
  
  Last update: 2012.04.03
  
  Following a personal discussion with Dr.Steden
  various explanatory remarks,
  
• diverse Erläuterungen,
  have been added to explain the post scriptum to the paper
  submitted to SMP '11, in particular the Bernoulli equation
  and the theory of ideal propulsors.
  
  Further correspondence resulted in additional explanations, in
  
• weiteren Erläuterungen,
  and in further remarks, in
  
• noch weiteren Erläuterungen,
  hopefully putting an end to the dispute.
  
  Last update: 2011.10.27
  
  A Paper on 'Ducted Propulsors in Open Water',
  
• Performance assessed by basic principles,
  to be presented at the Second International Symposium on Marine Propulsors,
  smp '11, to be held at Hamburg, Germany, June 15-17, 2011,
  has been reviewed, revised accordingly and upgraded, where necessary.
  
  For ready reference
• The review
  and
• An answer
  are documented here.
  
  Finally, on May 30, the
• Paper has been rejected.
  
  The paper is published here together with
• A preliminary re-design of a propulsor
  for discussion before and after the Symposium, while a Presentation will not
  (yet) be available due to the rejection of the paper and its presentation.
  
  Last update: 2011.06.07
  
  Contributions to the discussion are invited and very welcome.
  They will be duly acknowledged and published on the website of the author.
  
  The extended in-depth
• Discussions with Dr. Klaus Wagner,
  preceding the publication and already acknowledged in the paper,
  are published here for ready reference.
  
  Further in-depth re-design and evaluation of the
• Propulsor designed by Dr. Steden
  are published here for ready reference as well.
  
  The paper is a rigorously revised update of the earlier
• Theoretical analysis.
  As before the illustrating data have been taken from the
• Numerical analysis
  of the deeply submerged waterjet, subject of the paper
  by Jürgens and Heinke and of the author's contribution
  to the discussion.
  
  Last update: 2011.03.29
  
  

A ducted propulsor discussed

On occasion of the 101st Annual Meeting of STG at Hamburg, November 22-24,
2006, a written contribution on
• A deeply submerged waterjet: discussed
  has been submitted, based on an earlier, eight years old (!) publication
  by Dr. Dirk Jürgens of Voith Turbo at Heidenheim and Michael Bohm of SVA
  at Potsdam, provided in the absence of preprints.
  
  The goal of the contribution was to bridge the gap between the conceptions
  of propeller and pump designers on ducted propulsion systems.
  
  Following the contributor's continued analysis of the 'preliminary' data
  at hand Dr. Jürgens invited for an oral discussion, which took place
  at Heidenheim on February 13, 2007. Subsequently the contributor has undertaken
  a detailed analysis of the data published in the paper by Jürgens and Heinke
• A deeply submerged waterjet: numerically analysed
  and prepared a corresponding theoretical paper
• A deeply submerged waterjet: theoretically analysed,
  both together providing references for the update of his contribution
• A deeply submerged waterjet: finally discussed,
  suggested by STG to be published together with the response of the authors
  in HANSA.
  
  The continued discussion and the theoretical paper, finished March 16, 2007,
  together with the basic numerical analysis, and since available on this website,
  as noted in the STG Proceedings, had been due to be published in a February
  edition of HANSA 146 (2009), though without final comments of the authors,
  both being tied up in urgent project work.
  
  For reasons not disclosed the publication has been delayed until the discussion
  is no longer of current interest, at least not for readers of HANSA.
  The theoretical paper on the evaluation of the open-water performance of
  ducted propellers will be published elsewhere.
  
  Last update: 2009.09.14
  
  Closely related to the industrial development of Voith Marine at Heidenheim
  is the academic development at the Mercator University at Duisburg.
  The following is the final version of
• A contribution to the discussion
  of a paper presented by Max Steden at the Annual Meeting of STG
  held at Berlin, November 21-23, 2007.
  
  Subsequent to
• The final correspondence on the contribution
  Prof. Moustafa Abdel-Maksoud submitted
• The final response to the contribution.
  
  Last update and additions: 2008.10.19