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Developments in Marine Propulsors
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Developments in Marine Propulsors

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (10 July 2022) | Viewed by 11482

Special Issue Editor

Prof. Dr. Kourosh Koushan

E-Mail Website
Guest Editor
SINTEF Ocean and Department of Marine Technology, Norwegian University of Science and Technology, Otto Nielsens vei 10, N-7491 Trondheim, Norway
Interests: propulsors (propellers, thrusters, waterjets); cavitation; ventilation of propulsors; rotating marine renewable energy devices
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Marine propulsors are key components of the many thousands of ships operating in oceans, lakes, and rivers around the world. The performance of the propulsors is vital for the efficiency, environmental impact, safety, and comfort of ships. New types of propulsors, with electric drive, flexible blades, and multi-stage propellers, require new knowledge and improved tools. Innovative propulsor types using renewable energy from waves or wind are also becoming commercialised. Rotating marine renewable devices are used to gain energy from water currents. The improvement of computational fluid dynamics presents new opportunities for advanced design and performance prediction, and new instrumentation and data collection techniques enable more advanced experimental techniques. This Special Issue of the Journal of Marine Science and Engineering is devoted to bringing the latest developments in research and technical developments regarding marine propulsors and marine renewable rotating devices to the benefit of both academia and industry.

Prof. Dr. Kourosh Koushan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Propellers
  • Waterjets
  • Unconventional propulsors (azimuthing, SPP, rim drive, etc.)
  • Cavitation
  • Noise and vibration
  • Numerical methods in propulsion
  • Propulsor–ice interaction
  • Propulsor dynamics
  • Propulsion in seaways
  • Propulsion in off-design conditions
  • Energy-saving devices
  • Renewable-energy-based propulsors

Published Papers (6 papers)

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Editorial

Jump to: Research

1 pages, 154 KiB  
Editorial
Developments in Marine Propulsors
by Kourosh Koushan
J. Mar. Sci. Eng. 2023, 11(10), 1930; https://doi.org/10.3390/jmse11101930 - 07 Oct 2023
Viewed by 602
Abstract
Marine propulsors are key components of the many thousands of ships operating in oceans, lakes, and rivers globally [...] Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)

Research

Jump to: Editorial

16 pages, 4513 KiB  
Article
Longitudinal Vibration of Marine Propulsion Shafting: Experiments and Analysis
by Wei Chu, Yao Zhao, Ganbo Zhang and Hua Yuan
J. Mar. Sci. Eng. 2022, 10(9), 1173; https://doi.org/10.3390/jmse10091173 - 23 Aug 2022
Cited by 3 | Viewed by 1867
Abstract
The longitudinal vibration of the propulsion shaft system is a challenging issue for marine noise management. We conducted various static and dynamic tests on our built test rig for the shafting system, presenting the results in this paper. By combining experimental data and [...] Read more.
The longitudinal vibration of the propulsion shaft system is a challenging issue for marine noise management. We conducted various static and dynamic tests on our built test rig for the shafting system, presenting the results in this paper. By combining experimental data and the particle swarm optimization algorithm, we identified the structural parameters that are difficult to obtain. With these parameters we establish a completed theoretical model of a shaft system containing branches, analyze how and why static thrust affects vibration, and give quantitative results of the force transmissibility. Our work provides a reference for subsequent researchers. Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)
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21 pages, 6270 KiB  
Article
Sharp Profile for Icebreaking Propellers to Improve Their Ice and Hydrodynamic Characteristics
by Alexander Vladislavovich Andryushin, Sergey Vladimirovich Ryabushkin, Alexander Yurievich Voronin and Egor Vladimirovich Shapkov
J. Mar. Sci. Eng. 2022, 10(6), 742; https://doi.org/10.3390/jmse10060742 - 28 May 2022
Cited by 3 | Viewed by 1728
Abstract
Stern-first operation under severe ice conditions (ridges) is one of the most effective modes to increase the operating efficiency of icebreakers and ice ships. However, when a ship overcomes the ridge astern, the propellers continuously interact with ice blocks, and ice moment affects [...] Read more.
Stern-first operation under severe ice conditions (ridges) is one of the most effective modes to increase the operating efficiency of icebreakers and ice ships. However, when a ship overcomes the ridge astern, the propellers continuously interact with ice blocks, and ice moment affects the propeller and the main engine. This leads to propeller speed drop and propeller thrust reduction. Propeller stop is also possible. This is the reason why the propeller ice moment needs to be decreased. Blade profiles with a sharp leading edge are used for this purpose because their thickness is significantly less than that of a traditional icebreaking profile. The application of sharp profiling makes it possible to significantly reduce the ice moment (ice loads) on the propeller, reduce the drop in its speed, and increase the hydrodynamic thrust. The main task when installing blades with sharp profiles is to ensure the strength of their leading edges exposed to ice pressure. In this article, the authors tackle upon some methods of assigning integral and local ice loads on propellers. Solutions for ensuring the local strength of the blade edges were developed and presented. The influence of sharp profiling on the hydrodynamic and cavitation characteristics of ice propellers was considered. The article presents examples of calculating the hydrodynamic propeller thrust and moment, as well as ice loads on a propeller with a sharp and traditional profile, when an ice ship moves through a ridged ice isthmus with its stern first. Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)
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22 pages, 37130 KiB  
Article
A Measurement System to Monitor Propulsion Performance and Ice-Induced Shaftline Dynamic Response of Icebreakers
by Alessandro Zambon, Lorenzo Moro, Jeffrey Brown, Allison Kennedy and Dan Oldford
J. Mar. Sci. Eng. 2022, 10(4), 522; https://doi.org/10.3390/jmse10040522 - 09 Apr 2022
Cited by 5 | Viewed by 2410
Abstract
Polar navigation entails challenges that affect the continuation of ship operations in severe ice conditions. Due to ice-propeller interaction, propulsion shafting segments are often at a high risk of failure. Efficient methods for shaft line design are hence needed to ensure the safety [...] Read more.
Polar navigation entails challenges that affect the continuation of ship operations in severe ice conditions. Due to ice-propeller interaction, propulsion shafting segments are often at a high risk of failure. Efficient methods for shaft line design are hence needed to ensure the safety of ice-going vessels and propulsion reliability. To this end, full-scale measurements have proven essential to support the development of ship-design tools and updated safety regulations for ice-going vessels. This paper presents a unique integrated measurement system that employs measuring equipment to monitor Polar-Class vessel performance and shaft line dynamics during ice navigation. The system was installed on board the Canadian Coast Guard (CCG) icebreaker Henry Larsen. This experimental concept aims to monitor the shaft’s torque and thrust fluctuations during ice navigation to obtain information about the ship’s propulsion efficiency. In the paper, we describe the arrangement of the measurement system and the components it features. Finally, we present preliminary datasets acquired during two icebreaking expeditions. This work is framed into a broader research project, which includes the long-term objective to determine a correlation between sea ice conditions and the dynamic response of shaft lines. Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)
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14 pages, 3721 KiB  
Article
Analysis of Vibration Characteristics of Podded Propulsor Shafting Based on Analytical Method
by Yaqi Tian, Cong Zhang, Lei Yang, Wu Ouyang and Xincong Zhou
J. Mar. Sci. Eng. 2022, 10(2), 169; https://doi.org/10.3390/jmse10020169 - 27 Jan 2022
Cited by 6 | Viewed by 2274
Abstract
Podded propulsors are widely used in warships and cruise ships, which have a higher requirement of vibrational and acoustic design. Therefore, studying vibration characteristics and the transmission mechanism of podded propulsor shafting is significant for reducing vibration and ensuring the safe operation of [...] Read more.
Podded propulsors are widely used in warships and cruise ships, which have a higher requirement of vibrational and acoustic design. Therefore, studying vibration characteristics and the transmission mechanism of podded propulsor shafting is significant for reducing vibration and ensuring the safe operation of ships. This paper establishes a model of podded propulsor shafting by analytical method. The shafting is simplified to a heterogeneous variable cross-section beam, while bearings are seen as springs. The podded propulsor shafting has one radial-thrust hybrid bearing and one radial bearing. The excitations from the propeller and cabin are considered. The influences of bearing stiffness, bearing location, and excitation on vibration characteristics of shafting are analyzed. The main conclusions are as follows: Based on the analysis of the area that resonance frequency is sensitive to the change of bearing stiffness, the resonance frequencies of the shafting can be adjusted to the proper range. The large span between hybrid bearing and radial bearing leads to low stiffness of shafting and low resonances frequencies. Under radial excitations, the low vibration always occurs at the hybrid bearing, motor shafting, or propeller end of shafting. This research provides theoretical support for the design and optimization of vibration reduction of podded propulsor shafting. Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)
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29 pages, 16822 KiB  
Article
Research on the Performance of Pumpjet Propulsor of Different Scales
by Jun Yang, Dakui Feng, Liwei Liu, Xianzhou Wang and Chaobang Yao
J. Mar. Sci. Eng. 2022, 10(1), 78; https://doi.org/10.3390/jmse10010078 - 07 Jan 2022
Cited by 3 | Viewed by 1743
Abstract
This study presents a numerical research on the open-water performance of a pumpjet propulsor at different scales. Simulations were performed by an in-house viscous CFD (Computational Fluid Dynamic) code. The Reynolds-averaged Navier–Stokes (RANS) method with SST k-ω turbulence model is employed. A dynamic [...] Read more.
This study presents a numerical research on the open-water performance of a pumpjet propulsor at different scales. Simulations were performed by an in-house viscous CFD (Computational Fluid Dynamic) code. The Reynolds-averaged Navier–Stokes (RANS) method with SST k-ω turbulence model is employed. A dynamic overset grid is used to treat the relative motion between the rotor and other parts. The numerical results are compared with the model test data and they agree well. Comparisons for the open-water performance between the pumpjet propulsors with two scales are carried out. The results indicate that the total thrust coefficient of the large-scale pumpjet propulsor is greater than that of the small-scale one while the torque coefficient is smaller. Therefore, the efficiency of the large-scale pumpjet propulsor is about 8~10% higher than that of the small-scale pumpjet propulsor. The open-water performance of the rotor, pre-swirl stator and duct is obtained separately to estimate the discrepancies on the thrust and torque coefficients between different scales. To analyze the scale effect from different parts, the research on flow field and pressure distribution are carried out. The variation of total thrust and torque coefficient comes mainly from the rotor, which is caused by the flow field, influenced by the duct and stator. Full article
(This article belongs to the Special Issue Developments in Marine Propulsors)
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